Nishiro Nrg ii User manual

NRG II 27.5" Electric

Bicycle

User Manual

[Revision 2.0 April 2018]

READ THIS MANUAL CAREFULLY BEFORE USE – FAILURE TO DO SO MAY RESULT IN INJURY,

PROPERTY DAMAGE AND MAY VOID WARRANTY. • KEEP THIS MANUAL FOR FUTURE REFERENCE.

• Products covered by this manual may vary in appearance, assembly, inclusions, specifications, description

and packaging.

NRG II 27.5" Electric Bicycle

Safety

•Riding can be a hazardous activity. Certain conditions may cause the equipment to fail without fault of

the manufacturer. The product can and is intended to move, and it is therefore possible to lose control,

fall-off and/or get into dangerous situations that no amount of care, instruction or expertise can eliminate.

If such things occur, you can be seriously injured or die, even when using safety equipment and other

precautions. RIDE AT YOUR OWN RISK AND USE COMMON-SENSE. FAILURE TO USE COMMON-

SENSE AND HEED ALL SAFETY WARNINGS AND RECOMMENDATIONS INCREASES RISK OF

INJURY. USE THE PRODUCT ONLY WITH APPROPRIATE CAUTION AND SERIOUS ATTENTION

TO SAFE OPERATION.

•Before riding on the road, take time riding in an enclosed area to familiarise yourself with the

controls and behaviours of an electrically assisted bicycle. Try all settings so you are familiar

with the results.

•Before every ride, check bicycle condition and ensure that no fasteners are loose, particularly

axles, pedals, seat and handlebars. Ensure that the tyres are inflated to within specification

(printed on the tyre sidewall), and that the brakes are operating correctly.

•Maximum load capacity = 120kg.

•Understand and obey any local laws or regulations which may affect locations where the product may be

used. Ride defensively.

•This product is manufactured for performance and durability but is not impervious to damage. Stunts or

other aggressive riding can over-stress and damage the product, and the rider assumes all risks

associated with how the product is looked after.

•Keep fingers and other body parts away from moving components.

•Always wear suitable protective equipment, such as an approved safety helmet (with chin strap securely

buckled). A helmet may be legally required by local law or regulation in your area. Wear suitable

footwear for bicycle riding and clothing that helps make you visible to others.

Battery and Charging

•Never modify the electrical system. Alterations could cause a fire resulting in serious injury and could

also damage the electrical system.

•Charge with the supplied or recommended charger only. Use of the wrong charger could cause a fire or

explosion resulting in serious injury.

•Ensure the voltage and frequency of the charger is compatible with mains electrical supply.

•Use the battery charger in dry locations only.

•Regularly check the charger for damage to the electrical cord, plug, enclosure and other parts. If any

damage or malfunction occurs, do NOT use the charger until repaired or replaced.

•Use caution when charging.

•Do not operate the charger or charge batteries near flammable materials.

•Do not clean or perform any maintenance on the product when it is being charged.

NRG II 27.5" Electric Bicycle

Table of Contents

Safety...................................................................................................................................................2

Introduction........................................................................................................................................4

Parts Identification and Assembly...................................................................................................5

Tools Required for Assembly.....................................................................................................................5

Assembly ...................................................................................................................................................6

Handlebars..........................................................................................................................................6

Seat.....................................................................................................................................................7

Front Wheel.........................................................................................................................................8

Pedals..................................................................................................................................................9

Ancillary Parts............................................................................................................................................9

Operation ..........................................................................................................................................10

Pedal Assistance .....................................................................................................................................11

Using Pedal Assistance.....................................................................................................................11

Understanding the Control Panel and Display...................................................................................12

Special Functions..............................................................................................................................13

Guidelines for Using Pedal Assistance..............................................................................................14

Using Gears.............................................................................................................................................14

Using Brakes............................................................................................................................................15

Suspension..............................................................................................................................................16

Batteries and Battery Charging......................................................................................................17

Maintenance .....................................................................................................................................18

Battery Storage........................................................................................................................................19

Battery Fuse......................................................................................................................................19

Brakes......................................................................................................................................................20

Cable Adjustment ..............................................................................................................................20

Pad Adjustment .................................................................................................................................20

Pad Replacement..............................................................................................................................21

Tyre Pressures.........................................................................................................................................21

Chain Care...............................................................................................................................................22

Torque Settings........................................................................................................................................22

Frequently Asked Questions.............................................................................................................23

Troubleshooting...............................................................................................................................24

Specifications...................................................................................................................................25

NRG II 27.5" Electric Bicycle

Introduction

Congratulations on purchasing a Nishiro pedal assisted bicycle. We hope you enjoy years of satisfactory

and safe riding.

Read the manual.

This manual is provided to help you to get the best performance, comfort, enjoyment and safety from

your bicycle. The manual describes specific care and maintenance procedures that help protect your

warranty and ensure trouble-free use. Please pay particular attention to the section on battery charging

and maintenance.

Read the manual before assembling and riding your bicycle.

Note that the manual is not intended to be an extensive reference source for servicing, maintenance

and/or repairs. For additional assistance, contact an authorised Nishiro service centre.

In the interests of your safety and the safety of others, it is highly recommended to have

your bicycle assembled and serviced / adjusted by a skilled bicycle mechanic.

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NRG II 27.5" Electric Bicycle

Parts Identification and Assembly

No. Name No. Name

1 Bicycle Assembly (Frame, Forks, Handlebar,

Crank, Chain, Battery, Motor, Rear Wheel etc) 8 Parts / Tools / Accessories:

Quick-Release ("skewer") (front wheel)

Mudguard Bracket / Screws (rear wheel)

Bicycle Spanner

4 / 5 / 6mm Allen Key

Screwdriver

Pump / Drink Bottle and Bottle Bracket (may be

included)

2 Front Wheel

3 Rear Mudguard

4 Seat Post / Seat

5 Pedal (Left and Right)

6 Front Mudguard

7 Battery Charger and Connection Cables

Tools Required for Assembly

The bicycle may come supplied with some tools. Tools required for general assembly and maintenance may

include, but are not limited to, the following:

•Bicycle torque wrench.

•8mm / 10mm / 13mm / 15mm / 19mm spanners.

•2.5mm / 4mm / 5mm / 8mm Allen keys.

•Pliers.

•Phillips head screwdriver.

1

8

4

3

6

5

2

7

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NRG II 27.5" Electric Bicycle

Assembly

Before riding, ensure that all required fasteners are tightened to the correct torque. • Ensure

that the tyres are inflated to within specification (printed on the tyre sidewall), and that the

brakes are operating correctly. • Assembly may require 2 people. • Do NOT allow children to perform the

assembly. • Additional tools to those supplied (if any) may be required for assembly, such as a torque

wrench, pliers etc.

The bicycle comes with some minor assembly required, and may include some necessary tools.

Handlebars

1. Carefully place the bicycle assembly on a flat surface so that

it rests on the front fork and rear wheel.

2. The handlebar clamp (A) comes pre-assembled and should

not require any adjustment, however, may be facing the rear

of the bike (for shipping reasons). Loosen (rotate left) the 2

clamp screws (B) using a 5mm Allen key, then rotate the

handlebar clamp so it is facing forward. Note that the fork

brace (C) faces forward. Firmly tighten (rotate right) the

clamp screws.

3. Check for any forward –

backward movement in the

steering stem by holding the

forks firmly and pulling-pushing

the handlebar clamp. If any

rocking can be seen or felt,

remove the rubber cap (D) at

the top of the steering stem (E),

then using a 5mm Allen key,

tighten (rotate right) the top screw (F) sufficiently to remove

any movement. Ensure that the top screw is not so tight as to

bind the handlebar and make it difficult to rotate.

4. Remove (rotate left) the 4 handlebar yoke screws (G) using a

4mm Allen key, then remove the yoke (H).

5. Place the handlebar assembly (I) centrally into position in the

clamp. Rotate it so it is in a comfortable position and the

levers / controls are in easy reach of your fingers, then re-

install the yoke. Note that the display faces rear and the

brake levers face forward. Using a 4mm Allen key and torque

wrench, tighten the yoke screws to the specified torque.

6. Loosen (rotate left) the 2 handlebar clamp screws (B)

slightly, then rotate the handlebar assembly, as required,

so it is aligned "square" to the front fork. That is, the

handlebar will be at 90° to the bicycle frame when the

front wheel is straight, then using a 5mm Allen key and

torque wrench, tighten the handlebar clamp screws to

the specified torque.

C

A

B

F

H

G

I

A

H

90°

D

E

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NRG II 27.5" Electric Bicycle

The orientation of the front fork is correct when the

axle is facing forward. The orientation of the

handlebar is correct when the control cables and brake levers are

facing forward. It is ESSENTIAL that the fork and handlebar are

assembled correctly. The adjacent image shows correct fork /

handlebar assembly.

Seat

When setting seat height, it is important to ensure that the resulting ride position is not only

comfortable, but also safe. You should be able to remain stable and properly handle the bicycle

when at a standstill, touch the ground etc. You should also be able to comfortably reach the pedals

when riding and comfortably and safely operate the handlebars and all controls. A good reference height for

the seat is at hip height. Do NOT have the seat raised enough so you can see the maximum height marker

on the seat post. • Ensure that when the seat is clamped, you cannot rock it back and forth or rotate it.

1. Insert the seat post/seat assembly (J) into the bicycle frame and lower it to a comfortable position – do

NOT have the seat raised enough so you can see the maximum height marker (K) on the seat post.

2. Rotate the clamp lever (L) from the unlock position (AA) to the lock position (BB). If the seat post is not

clamped firmly, increase pressure by unlocking the clamp, then rotating the adjustment knob (M) right

(clockwise) a ¼ turn, then re-test and adjust as necessary.

The seat angle can also be adjusted, again for best comfort. To

adjust angle, using a 13mm spanner, loosen (rotate left) the seat

clamp nuts (CC) on either side of the seat until the front of the

seat can be moved up/down. Set the angle as required, then

tighten the nuts securely.

Note that small changes in seat position can have a substantial

effect on comfort. It is recommended to make seat adjustments in

small increments and test the position, then re-adjust as

necessary.

J

K M

L AA

L

BB

CC

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NRG II 27.5" Electric Bicycle

Front Wheel

It is ESSENTIAL that the wheel quick-release mechanism is installed and adjusted

correctly. Failure to do so will render the bicycle as dangerous. If you are in any way

unsure about installing and adjusting the quick-release, take the bicycle to an authorised service

centre or qualified bicycle mechanic. • For bicycles with disc brakes, install the quick-release so the lever

is NOT on the brake side.

1. Turn the bicycle over so it is resting on the handlebar and seat – ensure it is not resting on the

console.

2. Install the front wheel (N) by lowering it into the fork legs, so that the hollow axle (O) rests in the slots

at the bottom of the fork legs. Ensure that the brake disc (P) is on the same side as the brake caliper

(Q) and that the disc enters the caliper.

3. Remove the nut (DD) and spring (EE) from the quick-release (R) ("skewer"), then insert the quick-

release through the axle from the non-brake side.

4. On the threaded end of the quick-release, re-install the spring, small diameter first, and nut. Screw the

nut on, then rotate the quick-release lever (FF) toward the locked position – you should feel resistance in

the lever starting at about the halfway point in its rotation. The resistance is the ends of the quick-release

pushing the forks against the wheel axle. Continue rotating the lever to the fully closed position – it

should take some force to do this – if you cannot push the lever to the fully closed position, or it is very

easy to do so, adjust the quick-release nut (DD) as required until the is (a) wheel is fully secured by the

quick-release when the lever is in the closed position, and (b) the quick-release lever requires

reasonable force to reach the fully closed position.

To remove the wheel, rotate the quick-release lever to the fully unlocked position, then carefully pull the

wheel out from the bicycle forks.

P

Q

FF

DD

N

O

R

EE

DD

UNLOCK

LOCK

EE

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NRG II 27.5" Electric Bicycle

Pedals

It is critical that you follow the pedal to crank arm attachment procedure carefully to ensure

correct assembly. • During assembly, do NOT use excessive force to screw the pedals into the

crank arms – this may indicate misalignment of the pedals or mis-matched threads. If the pedal does not

"feel right" when being screwed in, STOP immediately and check that it is the correct pedal and that it is

aligned properly with the crank arm. Failure to follow the instructions here or take due care may

damage the equipment and void any product warranty.

1. Starting with the right-hand crank arm (S), identify the right-hand pedal assembly (T), which is identified

by having the pedal bolt stamped "R".

2. Very carefully begin screwing the pedal bolt into the crank arm (rotate right / clockwise). If the bolt does

not "feel right" when being screwed in, STOP immediately and check that it is the correct bolt and that it

is aligned properly with the crank arm. Screw the pedal bolt in fully, then tighten to the specified torque

using a 15mm spanner and torque wrench.

3. Repeat the above procedure for the left-hand crank arm, noting that the pedal bolt and crank arm

thread is left-hand (rotate left / anti-clockwise to tighten) and that the pedal bolt is stamped "L".

Ancillary Parts

•Attach the headlight (U) and front mudguard (V) (if applicable) to the

fork brace (W) using the 6mm bolt and nut. Firmly tighten the fastener

using a 10mm spanner, then rotate the headlight to a suitable angle.

•Attach the rear mudguard bracket (X) to the rear frame brace (Y) using

the 6mm bolt and nut. Firmly tighten the fastener using a 10mm

spanner. Using a screwdriver, attach the mudguard (Z) to the bracket

using the 2 mudguard screws (A1).

Assembly is complete. The bicycle should resemble the following

image (mudguards not shown).

T S

V

W

Z

Y

U

X

A1

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NRG II 27.5" Electric Bicycle

Operation

Before riding, ensure that all required fasteners are tightened to the correct torque. • Charge

the battery prior to use. • Ensure that the pedal assistance system is switched OFF when

the bicycle is not in use. • Always wear a helmet and appropriate safety equipment and always keep both

hands on the handlebars and both feet on the pedals whilst riding. Read, understand and follow all safety

recommendations before riding. • Avoid riding in damp conditions, rain etc as this may affect operation or

possibly damage the bicycle electronics.

No. Name No. Name

1

Frame

11

Battery Pack (inside frame)

2 Front Wheel 12 Front Brake Lever

3

Rear Wheel and Drive Motor

13

Rear Brake Lever

4 Seat Post / Seat 14 Display

5

Pedal (Right)

15

Headlight / Horn Controls

6 Pedal (Left) 16 Rear Derailleur

7

Chain

17

Front Fork

8 Pedal Assistance / Gear Change Controls 18 Brake Disc / Caliper (Front and Rear)

9

Crank Assembly (Bottom Bracket)

19

Gear Cluster

10 Handlebar 20 Chain Wheel

18

1

4

3

2

5 6

7

8

9

13

11

12

10

14

15

16

19

18

20

17

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NRG II 27.5" Electric Bicycle

Pedal Assistance

Charge the battery prior to use. • Pedal assistance is not mandatory for riding – normal bicycle riding

("pedal power") alone can be used. It is recommended to use pedal assistance when necessary,

and not rely on it solely. When using pedal assistance, also pedal for best efficiency. • The bicycle must be

moving, or have sufficient pressure placed on the pedals (in a forward direction) to activate pedal assistance.

• If you apply the brakes when pedal assistance is active, the drive provided by the motor reduces in

proportion to how much braking pressure you apply. Once the bicycle reaches a sufficiently slow speed or

stops completely, pedal assistance automatically deactivates. • Pedal assistance deactivates when a speed

of 25km/h or greater is reached. • The way pedal assistance operates may vary depending on how some

special functionsare set-up.

The bicycle pedal assistance system ("PAS") comprises an electric motor (A) built into the rear wheel hub, a

battery pack (B) (internal to the frame) and charging port (C), speed control twist-grip (D), control panel (E),

and display (F).

Using Pedal Assistance

1. Press and hold the "M" button on the control panel until the display illuminates.

2. Select the level of pedal assistance required on the control panel.

3. Begin moving using pedal power, then rotate the twist-grip downward to activate the motor. The further

you rotate, the more pedal assistance is provided.

4. To stop using pedal assistance, release the twist-grip.

Pedal assistance automatically deactivates when a speed of 25km/h or greater is reached.

A

B

C

D

E

F

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NRG II 27.5" Electric Bicycle

Understanding the Control Panel and Display

Control Description

A ON / OFF – Press and hold to activate / deactivate the control panel / pedal assistance system.

Also used for special functions.

B Increase Pedal Assistance – Press to increase the level of pedal assistance. The range of

values depends on special functions P05and P10. The current value is displayed (see F).

Press and hold to change the ride information (see H) display. Also used for special functions.

C Decrease Pedal Assistance – Press to decrease the level of pedal assistance. The range of

values depends on special functions P05and P10. The current value is displayed (see F). Also

used for special functions. Press and hold to activate / deactivate "walk assist" (see G).

D Horn – Press to activate the horn.

E Headlight – Press to activate / deactivate the headlight. When on, a "lamp" icon displays.

F Pedal Assistance Level – Indicates the currently selected level of pedal assistance (see B/C).

G Walk Assist – Press and hold Cwhen the bicycle is not moving to activate / deactivate. Walk

assist engages pedal assistance at a low speed to help when pushing the bicycle up steep hills

etc, if required. When active, a "person" icon shows in the display and the motor engages.

Cruise-Control – Press and hold Cwhen pedal assistance is active and the bicycle is moving to

activate / deactivate. Cruise-control maintains the current speed until deactivated or the brakes

are applied. When active, a "speedometer" icon shows in the display.

H Battery Charge – This indicates current battery charge, where 1 is minimum (battery charging

required) and 6 is maximum. When battery charge is sufficiently depleted, pedal assistance is no

longer available. Also shows as a percentage value.

I Ride Information – Indicates current speed, or maximum speed for the current trip, or average

speed for the current trip. Press and hold Aand Bsimultaneously to switch displays.

J Trip Information – Indicates various trip information including total distance travelled ("ODO") /

trip time (starting at when the control panel was last activated) / trip distance (starting at when

the control panel was last activated) / battery voltage / electrical current draw on the batteries.

Press and hold Aand Csimultaneously to switch displays.

K Status Icons

Twist-grip error detected. Battery low. Charge battery.

Motor error detected. Brake in use.

Controller error detected. Pedal assistance in use.

C

B

A

D

E

I

F

G

H

E J

K

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NRG II 27.5" Electric Bicycle

Special Functions

Changing the settings for some functions may cause the bicycle to operate abnormally or in a way

that may appear to be a fault. Take extra care when using any special function to avoid making a

setting that may adversely affect bicycle operation or how you want it to operate. • Changing

settings that may affect electrical components of the bicycle or render it unsafe may void warranty.

The bicycle has a range of special "program" functions that can be accessed by switching the unit ON, then

pressing and holding the Increase Pedal Assistance and Decrease Pedal Assistance buttons together

until the display changes to "PXx", where "Xx" is a number representing a particular setting. Step between

settings by pressing the ON / OFF button. Change values using the Increase Pedal Assistance and

Decrease Pedal Assistance buttons. Settings are:

•P00– Factory use only. Do NOT change.

•P01– "Display backlight". Sets display backlight intensity. "0" = darkest to "2" = brightest.

•P02– "Speed units". Sets the speed and distance unit of measure. "0" = kilometres / "1" = miles.

•P03– "System voltage". Sets the system voltage of the electrical system. Do NOT change this value

from "36" or performance will be affected, and electrical system components may be damaged.

•P04– "Auto-OFF timer". Sets how long the bicycle will remain ON when left idle and not being ridden. "0"

= indefinitely (not recommended), "1" = 1 minute, "2" = 2 minutes etc.

•P05– "Pedal assistance limiter". Sets a combination of how much pedal assistance is available and how

many steps can be selected. The settings are displayed as "0 0 3", "0 0 5", "0 0 9", which is 3, 5 and 9

levels respectively. This setting may be affected by P10.

•P06– "Wheel diameter". Sets the wheel diameter (in inches), and is used to calculate speed, distance

etc. For example, for 27.5" wheels, ensure setting is "27.5". Incorrect values will cause display errors.

•P07– Factory use only. Do NOT change this value from "1".

•P08– "Speed limiter". Sets a speed where pedal assistance is automatically "cut-off". Note that the

system does this automatically at approximately 25kmh, therefore values above "25" are

inconsequential. "0" = no pedal assistance, "5" = 5km/h etc.

•P09– "Pedal start". Sets if the rider must be pedalling for pedal assistance to engage. "0" = OFF / "1" =

ON. This setting is affected by P10.

•P10– "Pedal assistance mode". Sets how pedal assistance operates.

•"0" = Automatic – the level of pedal assistance is controlled electronically by the selected pedal

assistance value (P05). In this mode the twist-grip is not required, but the rider must be pedalling. In

this mode, cruise-control is not available.

•"1" = Full pedal assist – the level of pedal assistance is controlled by the twist-grip, however, the pedal

assistance level must be set to "0" (over-rides P05). In this mode, pedalling is not required. In this

mode, cruise-control is available.

•"2" = Semi-pedal assist – the level of pedal assistance is controlled by the twist-grip, however, the

pedal assistance level must be set to "0" (over-rides P05). In this mode, pedalling is required. In this

mode, cruise-control is available.

•P11– Factory use only. Do NOT change value.

•P12– "Pedal assistance sensitivity". Determines how quickly pedal assistance ramps up from 0 to

100%. The higher the value, the quicker the change is. "0" = slowest to "5" = quickest.

•P13– Factory use only. Do NOT change this value from "12".

•P14– Factory use only. Do NOT change this value from "12".

•P15– Factory use only. Do NOT change.

•P16– "Odo reset". Press and hold Increase Pedal Assistance button for >5 seconds to reset odometer.

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NRG II 27.5" Electric Bicycle

Guidelines for Using Pedal Assistance

To get the best performance and service life from the pedal assistance system, understand and apply the

following techniques:

Note that some characteristics of how pedal assistance functions may differ from that described

here as a result of some special function settings.

•When pedal assistance is active, the drive motor engages to provide assistance only while the bicycle is

in motion and you are pedalling. The amount of assistance provided depends on your pedalling force

and the level of pedal ride assistance currently selected (where applicable) and / or being applied.

•Pedal assistance progressively reduces as bicycle speed increases, and stops completely when the

current speed exceeds 25kmh. Pedal assistance re-engages when speed drops below 25kmh (provided

you are pedalling).

•Start moving from stationary by pedalling as per a normal bicycle. Using pedal assistance only when

"pushing off" places undue loads on the system and uses a lot of energy.

•It is recommended to pedal as per a normal bicycle when riding up inclines. Using pedal assistance only

when climbing uses a lot of battery energy.

•Pedal assistance automatically reduces or disengages whenever the brakes are activated (and / or when

you stop pedalling).

•Always switch OFF pedal assistance when you have finished riding, or are stopped for a period.

Using Gears

Some model bicycles are equipped with gears. Gears are used to change the

ratio between rotations of the rear wheel and the crank set. This enables you

to pedal less and travel faster on flat or downhill sections, or pedal faster and

travel slower to climb hills. Gearing is independent to pedal assistance, so

pedal assistance operates the same regardless of selected gear. Remember,

however, that pedal assistance is "governed" by overall speed.

The selectable gears (A) are located on the rear wheel, known as a "gear

cluster" or "cassette". The larger the gear, the less number of rotations per

rotation of the crank. The largest gear is the "lowest" and is referred to as "1".

As each gear becomes smaller, it is a "higher" gear then the previous and is

numbered sequentially. The number of gears may vary between different

models. Beneath the gear cluster is the derailleur mechanism (B), which

moves the chain so it runs on different gears. The derailleur is operated by

the rider using controls mounted on the handlebars. The gear change is

"indexed" so each gear selection positively engages – this is factory set and

should require no adjustment. There may be slight variations between bicycle

models in method to change gear "up" (from a lower gear to a higher gear), or

to change gear "down" (from a higher gear to a lower gear). The image shows

a "6-speed" type that uses a button (C) for changing up gears (push button to

activate derailleur), and a lever (D) for changing down gears (rotate lever

forward to activate derailleur).

A

B

C

D

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NRG II 27.5" Electric Bicycle

Guidelines for Using Gears

To get the best performance and service life from the gear change system, understand and apply the

following techniques:

•You MUST be pedalling during gear changes.

•Do not attempt to change multiple gears in a single action. Allow each gear change to complete fully

before the next change.

•Always use an appropriate gear for your speed, the terrain and incline. This helps you ride most

efficiently.

•Keep the chain and gears properly lubricated and clean.

•If you notice noise after changing gear or an ability to select a gear or the chain not running smoothly,

have the gear system inspected and adjusted by a bicycle mechanic or suitably qualified person.

Using Brakes

All bicycle models are equipped with a front and rear wheel braking system. Brakes are used to slow the

bicycle down. The braking systems may use different mechanics, however, the functionality is the same, and

that is to change the energy of the moving bicycle into heat energy ("friction"):

•For disc brakes, this means pads made from a special friction material pinching against a disc mounted

to the centre of the bicycle wheel.

•For rim type "caliper" or "noodle" brakes, this means rubber blocks pinching the outer rim of the bicycle

wheel (not the tyre).

•For drum brakes, this means pushing sections (known as "shoes") of special friction material against the

inside of cylinder fixed to the centre of the bicycle wheel.

Typical Disc Brake Typical Rim Brake Typical Drum Brake

The brakes are operated by the rider through levers mounted to the

handlebars. The left-hand lever operates the rear brake, the right-

hand lever operates the front brake. The ability of the rider to

adequately slow and/or stop the bicycle depends largely on the skill

of the rider, the surface being ridden on and other factors such as

rain, tyres, adjustment and condition of the brake parts etc.

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NRG II 27.5" Electric Bicycle

Guidelines for Using Brakes

To get the best performance and service life from the brake system, understand and apply the following

techniques:

•In wet conditions, which reduces friction, always provide additional distance for braking and

adjust how quickly you apply the brakes.

•When applying the brakes, particularly the front brake, use a lower pressure to start with until you feel

the brakes starting to "bite", then increase pressure as required. Do NOT over-apply the brakes and

cause the wheel to stop rotating – this may result in loss of control.

•Maintain the brake friction components (pads, shoes, rubbers) in good condition and replace when they

reach the wear limit.

•Maintain brake adjustment so that the brakes perform effectively, the levers are comfortably positioned,

and there is not excessive play in adjustable components.

•If the brakes are not performing effectively, making abnormal noise or any part is not serviceable or

cannot be adjusted correctly, have the brakes inspected and adjusted by a bicycle mechanic or suitably

qualified person.

•If the brake cables become frayed or otherwise damaged, have them replaced by a bicycle mechanic or

suitable qualified person.

Suspension

Some bicycle models are equipped with a front suspension system that may include some adjustment

features:

•Suspension "lock-out" (A). When the lever is in the sideways position (as shown), there is no suspension

movement – this setting is suitable for riding on smooth surfaces. When the lever is rotated so it faces

forward, suspension is active – this setting is suitable for rougher surfaces.

•Suspension "pre-load" (B). Rotate the "nut" anti-clockwise (left), to reduce spring preload and make the

suspension action more sensitive. Rotate the "nut" clockwise (right), to increase spring preload and

make the suspension action less sensitive.

Lock-Out

Active

Reduce

Pre-Load

Increase

Pre-Load

A

B

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NRG II 27.5" Electric Bicycle

Batteries and Battery Charging

Never modify the electrical system. Alterations may cause a fire, resulting in serious injury

and could also damage the electrical system. • Charge with the supplied charger only. Use of

the wrong charger may cause a fire or explosion, resulting in serious injury. • Ensure the voltage and

frequency of the charger is compatible with mains electrical supply. • Use the battery charger in dry locations

only. • The battery must be charged before first use. • For maximum battery performance and service life,

charge the battery after each use, and charge at temperatures between 0 and 40°C (32 and 104°F). • Battery

charging generally takes up to 8 hours from discharged to fully charged. Do NOT charge the battery

continuously for more than 24 hours. • If the bicycle has not been used for over 4 weeks, charge the battery

before use. • Always switch the bicycle OFF after each use.

The battery pack can be recharged repeatedly. However, rechargeable batteries eventually need to be

replaced. A significantly reduced operating period after charging indicates that the battery is no longer

serviceable and should be replaced. Discard old batteries in an environmentally responsible manner.

The battery charger has a charge status LED indicator:

•Red - Battery charging.

•Green - Battery fully charged.

To charge the battery:

1. Lift the protective cover from the battery charging port (A), located

near the crank, then plug the charger connector into the charging port.

2. Connect the charger to a mains electrical supply and switch ON. The

indicator LED on the charger illuminates red to show the battery is

charging.

3. When the battery is charged (approximately 8 hours), the charger

indicator LED illuminates green. Disconnect the charger from the

electrical supply, then disconnect it from the bicycle. Be sure to place

the protective cover over the bicycle charging port.

A

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NRG II 27.5" Electric Bicycle

Maintenance

Some maintenance activities described may be beyond the scope of some users. Do NOT

attempt procedures that you are not comfortable with, or do not have the necessary tools,

experience or knowledge for – take the unit to an authorised service centre or qualified technician for

servicing. Items in the maintenance schedule below that are recommended to be performed by a qualified

technician are highlighted yellow. • Failure to follow the maintenance recommendations, using incorrect

or non-compatible accessories or replacement parts, or general negligence may result in making the

product warranty void. Improper adjustment or service may result in damage to the bicycle or make it

hazardous. • Maintenance requirements may be affected by any number of factors from your riding style to

geographic location. • When new, parts of the bicycle may "break-in" over the course of the first approximate

100km of riding, possibly including the stretching of cables, spoke tension changes etc. It is recommended to

have the bicycle inspected and serviced at an authorised service centre or by a qualified technician. • The

bicycle components are subject to wear and stress. If a component is weakened through stress, age etc, it

may fail without warning. It is important to regularly inspect the bicycle for any signs of component fatigue –

look for cracks, fraying, discoloration etc, as this may indicate that a part is near the end of its useful life and

should be replaced.

•Clean the bicycle with a soft, damp cloth – do NOT use high-pressure water cleaners or hoses,

pressurised air, solvents, abrasives etc. For the console, battery and motor, do NOT use any liquids.

•When transporting in a vehicle, it is recommended to have the battery out of the bicycle during transport.

•Store the bicycle where it will be protected from rain, sun etc to help prevent corrosion, fading etc.

•For safety, longest possible service life and reliability, maintain the bicycle properly. Use the maintenance

schedule below for guidance. It is very important that you check certain systems and components before

each and every ride. The proper condition and function of these systems is critical to your safety.

Maintenance Schedule

Component / Condition

Check Before

Every Ride

*Check

Periodically

Clean /

Lubricate

Adjust / Tighten /

Replace as Required

Tyre Pressure ■■

Tyre Wear / Damage ■■

Brake Adjustment ■■

Handlebar Tightness ■■■

Controls and Displays ■

Seat Post Tightness ■■

Fasteners / Mounting Hardware ■

Brake Pads ■■

Brake Cable Wear ■■

Chain ■■■

Reflectors ■

Battery / Charger ■■

Steering Head Bearings ■■■

Derailleur ■■■

Wheel Spoke Tension ■■

Wheel Trueness ■■

Wheel Bearings ■■■

Bottom Bracket (Crank) Bearings ■■■

*Every 5 to 10 rides depending on ride length and conditions.

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NRG II 27.5" Electric Bicycle

Battery Storage

When storing the batteries for a long period of time:

•Charge the batteries at least every 30 days to avoid capacity loss. Batteries slowly self-discharge when

unused over a long period. If the battery cells are left at a critically low charge state, the lifespan and

capacity will be permanently reduced.

•Always disconnect the charger from the mains electrical supply and battery before storing the battery.

•Avoid storing batteries in extreme temperatures, whether hot or cold. The recommended battery

storage temperature is between 0 and 25°C (32 to 77°F). Avoid exposing batteries to temperatures at

or above 40°C (104°F) for extended periods.

•Batteries are best kept in a cool, dry place. Do not allow batteries to accumulate condensation, as this

may cause shorting or corrosion.

Battery Fuse

Use fuses of the same type only – the rating (in Amperes) is printed on the end of the fuse. • If the

fuse "blows" regularly, have the bicycle inspected at an authorised service centre.

The bicycle battery / electrical system may feature fuse protection to prevent damage in the event of a short-

circuit, overload or over-current situation. For example, if the electrical system is exposed to excessive

moisture. On some model bicycles, the fuse is accessible and can be easily replaced. If the fuse is "blown",

the bicycle electronics will not be available until the fuse is replaced. To replace the fuse:

1. Using a suitable screwdriver, remove (rotate left) the fuse holder (A) on the battery pack until fully

unscrewed, then pull the fuse holder and fuse (B) from the bicycle.

2. Discard the blown fuse. Insert the replacement fuse into the fuse holder.

3. Insert the fuse and fuse holder to the bicycle, and re-install (rotate right) the fuse holder until fully seated.

A

B

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NRG II 27.5" Electric Bicycle

Brakes

Cable Adjustment

The brake levers are fitted with cable adjusters to compensate for cable stretch and/or adjust how much

lever travel is required to activate the brake. A looser cable requires more lever travel to activate the brake, a

tighter cable requires less lever travel to activate the brake. Do not over-tighten the brake cable as this may

cause the brake to drag when not being pulled, which will affect the performance. Set brake adjustment so

there is enough free-play at the lever for a comfortable reach and brake action, however, NOT so much that

the lever can be pulled back to the handlebar. The brake can be adjusted at the lever and at the brake

caliper:

1. Rotate the lock nut (A) on the brake lever (B) to the left (anti-

clockwise) to loosen it, then rotate the cable screw (C) left

(anti-clockwise) to tighten the cable, or right (clockwise) to

loosen the cable, as required.

2. When adjustment is complete, tighten the lock nut (rotate

right). Check that the wheel can spin freely when the brake is

not being applied, and that it cannot be rotated when the brake

is applied.

If the cable cannot be adequately adjusted at the lever, further

adjustment can be made at the brake caliper.

1. Rotate the lock nut (D) on the brake caliper (E) left (anti-

clockwise) to tighten the cable, or right (clockwise) to loosen

the cable, as required. Check that the wheel can spin freely

when the brake is not being applied, and that it cannot be

rotated when the brake is applied.

If the cable cannot be adjusted using the lever/brake caliper, re-

adjust them so the brake cable is fully slack. Using a 5mm Allen

key, loosen the cable bolt (F) sufficiently so that the cable can be

pulled through it. Pull the cable through the cable bolt until close

to being taught, then tighten the bolt to the specified torque

using a torque wrench. Check adjustment, and re-adjust if

necessary as described above.

Pad Adjustment

As brake pads wear, the distance between the friction material

of the pad and the disc increases. The calipers feature an

adjustment screw (G) that can be used to reduce excessive

clearance. Brake pad clearance should minimised, however, not

so that the pads touch the disc when the brakes are not being

applied. Brake pads should be changed when the brake pad

friction material is 0.5mm or less.

1. Using a 4mm Allen key, rotate the adjustment screw right

(clockwise) to reduce clearance; rotate left (anti-clockwise)

to increase clearance (for example, after replacing the

pads).

B

A

C

F

D

E

G

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NISHIRO NRG II User manual

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