oset 20.0 User manual

OWNERS MANUAL
OSET 20.0
OSET CORP
146 W. Irvington Place,
Denver, CO 80223. USA.
303 990-2390.
http://www.OSETBIKES.com
[email protected]

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INTRODUCTION:
A WORD ABOUT THIS OWNER’S MANUAL AND SAFETY:
Firstly, thank you for purchasing an OSET Electric Mini Trials Bike. This is a
serious piece of machinery designed for use by children in fully controlled and
safe environments. As the purchaser/owner of the machine, YOU are the
responsible adult with the task of keeping the rider(s) safe at all times. If you
defer this task to another adult, it is YOUR RESPONSIBILITY to pass this
owners manual and all relevant information to whoever will take on this role, and
ensure without question that the rider is controlled and taught in a safe manner.
Your OSET is very adjustable and can be specifically set up for the rider. Please
do not allow the machine to be used or adjusted by other children or adults.
There are likely to be many children asking for a ride. DO NOT ALLOW THIS TO
HAPPEN. It is likely you know the abilities, levels of concentration and attention
span of the child you purchased the machine for. EVERY CHILD IS DIFFERENT
and it is impossible for you to properly supervise other children.
Your OSET is driven by a powerful electric motor. The speed button/switch
MUST be adjusted to suit the abilities of the rider. Please remember that even
when the speed is set to a slow setting, the torque on these motors is virtually
instant. This means that opening the throttle will propel the machine to the set
speed very quickly. For developing good riding skills this is a wonderful feature,
as it will teach the rider throttle control at a very early age. In a ‘panic’ situation,
riders tend to open the throttle more. This could result in a crash, serious injury or
death, as well as damage to the machine. Your OSET has great capabilities, and
can grow with the skills of the rider to very high levels, but it is IMPERITIVE that
the responsible adult controls the entire learning process and gives full attention
at all times. IT IS YOUR RESPONSIBILITY TO FORESEE ALL POTENTIAL
SITUATIONS AND CONTROL THE RIDING ENVIRONMENT ACCORDINGLY.
This means not just the machine and the rider, but also the riding terrain and
environment.
Our machines are virtually silent, and can be used in many places that gasoline
bikes can not. They are brilliant for practicing in back yards, front yards, garages,
and even indoors!
OSET Mini Bikes are designed for off road use only and must not be used on
public roads or sidewalks. Please check and obey all local laws. OSET’s may
only be ridden in safe areas where all laws are being followed and all required
permissions are given.
OSET’s are amazingly capable, and can be used from the earliest stages of
learning to ride all the way through to National Children’s Motorcycle Trials
Competitions. The secret of learning to ride well is being able to ride a lot.
OSET’s enable this to happen, and can make the learning process very gratifying
for both the children and the adults. Thanks again for purchasing an OSET, and
we hope you, and your child, will enjoy the ride!
Ian Smith. President, OSET CORP.

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PLEASE READ THIS OWNER’S MANUAL
PRIOR TO OPERATION!
To ensure optimum performance from your new OSET, and to ensure
safe operation, it is important to fully understand the features of the
machine. This manual contains IMPORTANT INFORMATION that every
owner must fully understand.
PARENTS/GUARDIANS
If a child will operate your OSET, it is YOUR
RESPONSIBILITY to set up the machine, and make sure it is operated
correctly and safely. Your OSET 20.0 features a speed switch that sets
top speed to either 100% or 75%. It also has a throttle response ‘map’
dial. This will set the throttle response from very slow, up to very fast.
The OSET controller is capable of outputting 100 amps, which is a lot of
power. At a slow response setting, it will not pull the maximum power on
flat ground, but will use what is necessary on inclines. This is a great
feature. BUT, the power must be learned. ALWAYS start the rider at the
slowest speed and slowest response settings. Even with a slow
response, a lot of power is available, and the rider must learn how to
control it. These controls must be set by the responsible supervising
adult. Never allow the child to alter the setting, or to ride without suitable
supervision. Instructing and practicing in a controlled situation will allow
the child to learn how to operate the machine safely, and under control.
The child’s enjoyment will be greatly enhanced if they feel safe during
the initial learning process. Please follow the instructions contained in
this manual before operating the machine.
SERVICE/WARRANTY
For all questions regarding your OSET Mini Bike, please contact your
local retailer/distributor.
See distributor contact information on the osetbikes.com web site.
OFF ROAD USE ONLY!
OSET Mini Bikes are designed for off road use only and must not be
used on public roads or sidewalks. Please check and obey all local laws.

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Important Symbols and Terms
This Owner’s Manual uses the following symbols and terms to call
your attention to Warnings, Cautions and Notes:
Term: WARNING
Meaning: This term calls attention to a Warning. A Warning indicates a
potentially hazardous situation which, if not avoided, could result in bodily injury
or death, in addition to property damage. Read the text accompanying the
warning to be aware of the specific hazard.
Term: CAUTION
Meaning: This term calls attention to a Caution. A Caution indicates a potentially
hazardous situation which, if not avoided, may result in damage to equipment or
inadvertent system failure. Read the text accompanying the Caution to be aware
of the specific hazard and avoid damage or system failure.
Term: NOTE:
Meaning: This term calls attention to a Note. The text accompanying a Note
provides helpful or other important related information.
Please read, understand and follow all Warning, Caution and Note
notices on your OSET electric bike and those included in this
Manual. If you do not understand any of this important information,
please contact your selling dealer/distributor or the OSET Customer
Service Department.

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WARNING: OFFROAD USE ONLY.
It is illegal and hazardous to use this vehicle on streets and thoroughfares. Use
on streets exposes the rider to hazards from motorists and other vehicles. Use
on streets can lead to accidents resulting in death or serious injury, and property
damage. Check local laws and regulations to find out where and how you
may use this product legally.
WARNING: ADULT SUPERVISION REQUIRED.
This vehicle must be used in the presence of adult supervision to ensure that
safe riding practices are established and followed. Even though a child is of the
recommended age to use this vehicle, not all children have the strength, skills or
judgment needed to operate this vehicle safely. A parent should supervise their
child’s operation of this vehicle at all times. Parents should permit continued use
of this vehicle only if they determine that their child has the ability and judgment
to operate the vehicle safely.
WARNING: FOLLOW SAFE RIDING PRACTICES.
• OPERATOR ONLY! NO PASSENGERS!
• Long hair, loose clothing or items worn by the rider must be covered to prevent
entanglement in moving parts of the vehicle or surroundings while riding.
• Do not exceed the weight limit. Heavier riders may significantly reduce
performance and/or render the vehicle unstable and/or over-tax the brakes and
other control devices. Heavier riders may cause structural damage not covered
by the warranty.
• Do not touch any moving or hot parts.
• Do not ride at night or under other low visibility conditions.
• Do not immerse this vehicle in water.
• Do not ride on steep or uneven surfaces. Steep or uneven surfaces greatly
increase the likelihood of loss-of-control and a fall.
• Do not ride faster than conditions permit for safe operation. Excess speed
greatly increases the likelihood of loss-of-control and a fall.
• The rider should be securely seated on the vehicle ready to ride with the
kickstand up before turning on the vehicle.
WARNING: WEAR PROTECTIVE EQUIPMENT,
ESPECIALLY A HELMET AND EYE PROTECTION.
A high quality helmet approved by your country’s governing body is the single
most effective way to reduce the severity of an injury in the event of an accident.
ALWAYS use an approved helmet when riding this vehicle. As this vehicle is
intended for OFF-ROAD use, there is a very high likelihood that dirt and other
debris will be thrown into the air, presenting the risk of eye injury if protective
eyewear is not used.
OFF-ROAD riding presents many hazards such as loose dirt and gravel,
obstacles and other difficult-to-see-and-avoid conditions. The possibility of a fall
is high. Wear gloves, wrist, knee and elbow protection. Motorcycle leathers can
prevent abrasion injuries in the event of a fall. Failure to use appropriate safety
equipment greatly increases the likelihood of death or serious injury in the event
of an accident.

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WARNING: PROPER MAINTENANCE OF THIS VEHICLE
IS REQUIRED.
Failure to maintain this vehicle in proper operating condition can lead to an
accident resulting in death or serious injury, and property damage. If you have
any questions about the proper care and maintenance of this vehicle, consult
your selling dealer/distributor or contact OSET Customer Service at
[email protected]. Before each ride, make sure that all bolts and nuts are
fastened securely and that the tires are properly inflated. Before each ride, check
that the throttle and brake controls are operating freely. Adjust and lubricate the
drive chain as necessary. See pages 19-30 of this manual for additional details
regarding service, repair and maintenance. Check the OSET web site for
maintenance guides. This vehicle should be returned for periodic maintenance to
your selling dealer AT LEAST once per year, but more frequently if used under
severe conditions.
WARNINGS!
Failure to obey all of the warnings & instructions contained in this
manual may result in serious injury or death and permanent
damage to your OSET.
Safety Responsibilities
It’s up to you. We’ve done everything we can to supply you with a safe and
reliable product. Please read, understand and practice the following guidelines
for safe operation of your OSET electric Trials Bike:
• Always follow the Pre-Ride Checklist before every ride.
• Do not operate your OSET if any damage is apparent. Immediately contact
your local retailer/distributor or OSET Customer Service.
•Supervision: Riders must be supervised by responsible adults at all times.
The rider should never be beyond eye and voice range. An adult must ALWAYS
assess and approve the riding conditions and the bike preparedness before the
bike is ridden. Always ensure the rider is cautious, maintaining complete control
and a reasonable speed. Ensure the terrain is suited to the skills of the rider.
• Helmets & Safety Attire: There is no single factor that works better at reducing
the severity of injuries sustained in accidents more than a quality helmet. Please
don’t ever allow your OSET to be ridden without one. Riders should also wear
suitable riding gear - gloves, eye protection and boots. Boots should NOT HAVE
LACES. Shoe laces and loose clothing, or even long hair could potentially get
caught in wheels, chains, or sprockets.
• One Rider Only: Your bike was engineered to carry one rider and no (0)
passengers. Carrying a passenger would overload the machine and alter the
handling. Do not allow this to happen.
• Do not overload the bike: OSET’s are designed for small, lightweight riders.
Exceeding the weight limitations will adversely affect the handling of the
machine, and potentially cause damage.

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• It’s the law; obey it: Obey all laws. OSET’s are for OFF-ROAD USE ONLY.
OSET bikes can not be used on public roads or sidewalks. The purchaser,
owner, and/or riders of this machine are directly responsible to know and obey all
local, state, and federal laws regarding the riding and use of this machine.
• Weather & Riding Conditions: Bike brakes don’t work well when they’re wet.
Don’t ride in the rain or snow. Please be aware that distance to stop may double
or triple over the distance that it takes under dry conditions. Ride more slowly,
and anticipate your stops by applying the brakes MUCH earlier. Don’t allow
children to ride on slopes that are too steep for their ability.
• Night time: Don’t ride after dark or in low light conditions.
• Maintenance: It worked fine when we put it in the box: Please maintain your
bike. There are instructions here in this manual. We haven’t figured out how to
make a bike that takes care of itself. Check the brakes and the tires and the
tightness of all those important fasteners before each and every ride. Pretend
that you’re a pilot doing a walk-around of his airplane before taking-off. The pilot
knows that his life depends on the airworthiness of his airplane; the rider’s life
depends on the preparedness of your bike. Please have your bike checked by a
qualified mechanic AT LEAST once a year. It’s a small investment in the well-
being of the rider.
• Batteries: We have equipped your OSET electric bike with sealed lead acid
batteries. We have devoted an entire chapter of this manual to the batteries.
Please read and understand this important information. As always, if you
have any questions, please don’t hesitate to contact us.
- Read this manual cover to cover: There is a lot of important information that
you need to know. Do not guess how to adjust the machine, charge it or ride it.
We have recommendations that will instruct how to set –up, maintain, and ride
your OSET. Please read them thoroughly.
- Call us with questions or problems: We can be reached at the numbers
listed on the back cover of this manual. You can also get assistance from the
OSET dealers.
IN SUMMARY:
1. SUPERVISION. A responsible adult must supervise at all times.
2. WEAR A HELMET & SAFETY GEAR. The rider must wear a helmet
& appropriate safety gear EVERY TIME.
3. NO PASSENGERS.
4. DO NOT EXCEED THE WEIGHT LIMITATIONS OF THE MACHINE.
5. OBEY ALL LAWS
6. RIDING CONDITIONS. Braking and traction are significantly
reduced in wet or slippery conditions. Terrain varies, so be
responsible!
7. DO NOT RIDE in low light conditions.
8. PLEASE MAINTAIN YOUR BIKE.
9. CARE FOR YOUR BATTERIES.
10. READ, STUDY AND UNDERSTAND THIS ENTIRE MANUAL.
11. If you don’t understand any aspect of the use and care of your
bike, PLEASE call OSET Customer Service.

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WARNING!
The OSET 20.0 is designed to operate at 48 volts only. Use of any battery
voltage higher than 48 volts will result in motor failure. OSET CORP
considers such modifications and/or changes to its products to be a
material alteration of any such products, thereby voiding any warranties
and/or guarantees in their entirety and will not be responsible for any
and/or all injuries, death and/or other damage(s) caused by any such
modifications.

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INDEX

Introduction: - Page 2
Please Read: - Page 3
Warnings, Cautions and Notes: - Page 4
Contents: - Page 9
Specifications – OSET 20.0: - Page 10
Key Components - Page 11
Unpacking and Assembly: - Page 12
COMPONENT DETAILS:
Switches, dials and indicators - Page 15
Key Switch - Page 15
Charge port - Page 15
Handlebar switch - Page 15
Speed switch - Page 15
Power response dial - Page 16
Charge indicator: - Page 16
Drive Train: - Page 17
Chain Adjustment
Motor Performance: - Page 18
Suspension: - Page 18
Daily Maintenance and Cleaning: - Page 19
Cleaning: - Page 19
Front Wheel Removal/Installation: - Page 20
Rear Wheel Removal/Installation: - Page 20
Brake Adjustment - Page 21
Battery Use, Care and Maintenance: - Page 23
Charging Instructions: - Page 24
Important Notes about Charging - Page 25
Battery Removal and Installation - Page 27
Long Term Storage: - Page 27
Battery Disposal: - Page 27
Wiring & wiring diagram - Page 28
Setting Up Your OSET for Riding: - Page 30
Riding Instructions and Safety Tips: - Page 32
1. Stationary Learning: - Page 32
2. First Ride: - Page 33
3. Learning to Stand Up: - Page 34
4. Learning Some Technique: - Page 35
Contact Us: - Page 36
Limited Warranty: - Page 37

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SPECIFICATIONS – OSET 20.0
Performance:
- Maximum Speed - 15/20mph
- Maximum Range - 10 miles
- Weight Limit (Rider) - 100lbs
(45.5kg)
NOTE!
Many factors affect speed and range capabilities. Terrain, average speed, rider
weight, tire pressures, wind, hills etc all have an impact.
Chasis:
- Frame - Steel
- Suspension (Front) - Telescopic air fork. Adjustable rebound
- Suspension (Rear) - Spring & oil type, adjustable rebound.
- Wheels - 19” aluminum alloy, 36H hubs.
- Tires - 2.5” x 20” wide front & rear.
- Brakes - Hydraulic disc, 160mm.
- Foot pegs - Alloy.
- Handlebars - Alloy.
Motor:
- 1200 watt brush type. 48 volt.
- Gearing – 10T front sprocket, 86T rear. #219 chain.
Controller:
- 48 volt, 100 amp pulse width modulating, with inline relay and fuse.
- External speed button (75% & 100%) and throttle ‘map/response’ dial.
Throttle:
- Twist type with LED battery charge indicator.
Batteries:
- 4 X 12 volt 10 amp hour sealed lead acid AGM. 4 batteries in series.
- Dimensions - 151mm x 65mm x 110mm (each).
Keys, Dials and Ports:
- Key Switch. Optional handlebar switch.
- Speed switch (75% & 100%).
- Throttle map/response dial. Tunable response.
- 48 Volt Charger Port.
Size:
- Wheelbase - 41.5” (1040mm)
- Seat Height - 21.5 ” (545mm)
- Ground Clearance - 10.5” (265mm)
- Handlebar Height - 37” (985mm)
- Weight (without batteries) - 49 lbs (22.2kg)
- Weight (with batteries) - 79 lbs (35.8kg)

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KEY COMPONENTS:
The key switch and charge port are located
beneath the ‘tank’ area. As the rider sits, the key
switch is on the right and the charge port on the
left. Each is covered to protect from the elements.
See page 15 for further details.
The maximum speed switch and throttle response
dial are located underneath the rubber bung in the
‘tank’ area.
The OSET 20.0 features front and rear hydraulic
disc brakes. A disc guard protects the front disc.

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UNPACKING AND ASSEMBLY:
WARNING!
Failure to properly assemble and adjust your bike prior to use may result in an
accident resulting in death, serious injury and/or property damage. If you are
uncertain about any aspect of the assembly and adjustment of your bike, seek
help from a qualified mechanic or the OSET Customer Service Department.
WARNING!
There are no user serviceable elements incorporated into the motor, motor
controller, batteries, battery charger, throttle, or wiring harness of your OSET
electric bike. DO NOT ATTEMPT TO DISASSEMBLE OR ADJUST ANY OF
THESE COMPONENTS. Doing so may cause extensive damage to these
components, will void your warranty, and may cause a hazardous condition. If
you cannot resolve a problem using this owners manual, contact your OSET
authorized dealer, or call the OSET Customer Service Department for
assistance.
NOTE!
If you purchased your OSET at a local retailer your machine may be fully
adjusted and ready to ride. If you purchased your OSET in the carton, please
carefully follow the instructions below and any supplemental instructions to finish
the assembly and adjustment of your OSET.
OSET 20 inch
1. Remove your OSET & Accessory pack from the box and check contents
against the following list:
1/ Bike less front wheel
1/ Front wheel
1/ Accessory Box containing:
1/ Front mudguard (fender)
1/ Rear mudguard
1/ Battery charger c/w power lead & manual
1/ Battery bag
3/ Battery link wires
1/ Disc guard
1/ Disc guard clamp washer
1/ Number board
4/ Black cable ties
1/ Spring1000lb
2/ Front wheel spacer (these maybe all ready attached to front wheel
and secured with cable tie)
1/ Hex Key set (Allen keys)
1/ Manual for air forks
1/ Manual for rear shock
2. Place your OSET on a solid & level stand, with both wheels off the ground.

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3. Remove all the packing materials.
4. Using the supplied allen wrench, make sure the steering stem is in the forward
facing position and tighten the top and side bolts securely and evenly. Secure the
handlebars tightly in the steering stem. Double check tightness and alignment.
Adjust the brake lever positions and reach to suit the rider. See page 21.
5. Fit front mudguard using the bolts, nuts & spacers provided (picture 1).
6. Fitting Front Wheel.
Using the 8mm allen wrench remove the axle by first unscrewing and removing
locking allen bolt (picture 2). This is on left side when facing the front of the bike
and unscrews clockwise (left hand thread). Remove axle from the fork legs. This
is unscrewed anti clockwise (right hand thread – picture 3).
1. 2. 3.
7. Remove disk pad spacer (picture 4 - this item is used for transport only).
8. Loosen top caliper allen bolts (Picture 5 - 5mm wrench) - so it will move side to
side so as to aid fitting of wheel.
4. 5. 6.
Position wheel between forks being careful not to dislodge hub spacers. If
spacers are not fitted find these from accessory box & fit to wheel ensuring outer
retaining washer with O-ring is pressed right home. Now put disc clamp washer
on axle and partially re-insert axle but leaving at least 15mm proud (picture 6).
8. Fit disc guard making sure the guard retaining washer is in correct position.
Push axle home and screw in tight. Replace locking bolt in opposite side.
9. Spin the front wheel and apply the front brake. Do this twice. While holding the
front brake on - tighten caliper bolts. This will centre the caliper and help to give
even wear of the pads and free running of the front wheel.
10. Adjusting rear caliper. Ensure rear wheel is clear of ground and turn by hand
and check brakes are not binding if they are loosen cap screws and adjust. Be

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aware that because the wheel can be moved back and forth for chain adjustment
the caliper does also - so make sure it does not rub on the outer diameter of disc.
11. Install the front number plate using the supplied ‘zip-ties’. This attaches to
the handlebars and the forks (picture 7).
7. 8. 9.
12. Check tire pressure of both tires and confirm they are properly inflated to 20-
40 psi. Light riders can use lower pressures.
13. Unpack batteries from box (shipped separately. Install the batteries as
indicated (picture 8 & 9). It is vital that connections are made correctly. The
battery bag should be installed before connecting the positive (red) and negative
(black) leads.
WARNING!
Failure to properly install the batteries may result in an accident resulting in
death, serious injury and/or property damage. If you are uncertain about any
aspect of the assembly and adjustment of your bike, seek help from a qualified
mechanic or the OSET Customer Service Department.
14. Unpack charger from its box and read manual. CHECK THAT THE
VOLTAGE SWITCH IS SET CORRECTLY FOR YOUR COUNTRY (120 or
240v). Charge the batteries while thoroughly reading the complete owners
manual. (See charging Instructions on pages 24).
15. Compress and check each brake lever in turn. The lever should not
compress completely to the bar. Each individual brake should hold the bike
securely when you push the OSET against the brake. If your brake needs
adjustment, follow the instructions on page 20. Learning riders should be aware
which lever operates which brake.
16. For maximum battery life, always fully charge before operating your OSET for
the first time and never store with discharged batteries. (See page 24 for
charging instructions).
17. While your batteries are charging, please Read Your Owners Manual
completely.

Now your OSET is fully assembled, adjusted and checked. Once the
batteries are fully charged, your OSET will be ready to ride safely.
WARNING!
The power must be switched to the off position before attaching and plugging in
the charger.

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SWITCHES, DIALS & INDICATORS:
The switch and charge port are under the ‘tank’ area, on the under side.
Key Switch:
The key switch turns the power on
and off. When the rider is sitting on
the bike, this is located underneath
them on the right side of the bike, at
the front. This location encourages
the rider to turn the key with their
right hand. The key is removable,
and should be removed when the
bike is not in use.
Charger Port:
When it’s time to recharge the bike,
the battery charger connector
attaches to this port. Before
attaching, ensure that the power is
switched to the off position. Please
refer to the battery and charging
section (page 23) of this manual for
more information.
Optional handlebar switch:
This switch is in addition to the key
switch and provides extra functionality.
The key switch MUST be in the ‘on’
position for the handlebar switch to
operate. With the key switch in the ‘on’
position, the handlebar switch can be
used to turn the bike on and off. The
responsible adult can remove the key
when the bike is not in use.
Speed switch:
The speed switch is located underneath
the rubber bung for convenience. This
must be altered/changed by a
responsible adult only. When pressed in
the ‘in’ position, the bike will have a
maximum speed set at 100%. When in
the ‘out’ position speed will be reduced to
75%.

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Power response dial:
This is the most important
adjustability feature on the bike. It
must be treated very carefully as
the range of adjustability is
enormous. THIS DIAL IS TO BE
ADJUSTED BY A RESPONSIBLE
ADULT ONLY. The function of this
dial is to adjust the ‘response’ of the
bike. Fully anti-clockwise will give
the slowest throttle response.
Fully clockwise will give the
quickest response. Refer to page xx
for instructions on setting these
controls
ALWAYS start with the slowest
setting, and make changes in very
small increments. It may appear
that the fastest response will be
suitable for a given rider, but it must
be understood that as the response
is made quicker, the power delivery,
and power quantity, is increased.
As an example - at the slowest
setting on flat ground the bike may
only pull 20 amps. At the fastest
response, it will pull 100 amps. This
is a lot of available power. It is a
great feature to have such a range
available, but it MUST be treated with
respect. ALWAYS adjust from lower to
higher, in very small increments.
PLEASE NOTE:
Even at low/slower settings the bike can
still provide 100 amps of power in certain
conditions. Again, this is a great feature.
If a rider is on a steep incline, a lot of
power can be delivered to get them up.
In effect, even if the response is slow, the
power can be high. This must be
understood, and the power treated with
caution and respect.
CHARGE INDICATOR:
The battery charge indicator is located on
the throttle assembly and shows the state
of the batteries. The indicator lights can
be checked at any time to determine if
the main power is off or on. Always turn
the power off and remove the key when
the bike is not in use.
WARNING!
It is very important to keep everyone clear of the bike when changing and
checking the speed and response settings. The dial is sensitive to small
adjustments. Do not guess at changes. Always check before the rider gets back
on to ensure the desired setting is correct for the abilities of the rider.

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DRIVE TRAIN:
Your OSET features a traditional chain and sprockets. It is direct drive, with no
gears. With the motor mounted in the swingarm, suspension movement has no
effect on tension. However, the chain does need to be checked and adjusted
regularly, especially when the bike is new. The chain must be checked before
every ride and adjusted as necessary. There should be very little slack in the
chain. Adjustment is done as follows:
1. Ensure power is turned off.
2. Loosen axle nuts.
3. Turn adjustment nuts evenly on both sides. Very small movements can
make a big difference. Do not tighten so much there is no slack at all. It
should be ‘taught’, not ‘tight‘.
4. Lubricate the chain & check the sprocket bolts for tightness.
5. Reverse the above procedure, ensuring all bolts are tight.
6. Check the wheel for alignment (see section 20), and the chain for tension.
These two pictures show the correct tension. When pushing up on the
chain, it should only move 5-10mm.
Axle Nut (15mm) Chain tensioner nut (10mm).

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WARNING!
Failure to maintain and adjust the chain and align the wheel correctly could result
in the chain jumping off the sprockets, causing a potentially dangerous and
damaging condition.
MOTOR PERFORMANCE & MAINTENANCE:
The OSET motor has been designed for high performance. Do not power wash
the motor. Check that the sprocket bolt is tight periodically. Water proof grease
can be applied around the shaft where it enters the motor for additional
protection from the elements. Similarly, a bead of silicone can be applied where
the casings join for additional weather protection.
WARNING!
The motor can get hot. It is designed to withstand high temperatures. However,
sustained maximum output is not recommended. The motor is designed to
withstand pulses of maximum output, not sustained.
SUSPENSION:
OSET’s feature adjustable front and rear suspension. The available adjustability
is a great feature. Separate owners manuals are provided. Please read for
further information on how to best set up the suspension.
Front Suspension:
The front suspension is an ‘air’ fork. A specific air pump is required to add
pressure. The fork is also adjustable for rebound with a simple dial.
Rebound dial. Fork air pump (not supplied)
Rear Suspension:
Your OSET is equipped with a single coil spring type rear shock. For a
harder/stiffer ride at the rear tighten the adjustment ring in a clockwise direction.
For a softer ride, loosen the adjuster by turning anti-clockwise. It also features a

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very effective rebound dial. Optional springs are available from OSET to adjust
the spring rate.
DAILY MAINTENANCE AND CLEANING:
- Keep your OSET clean and dry. Clean using the recommended
procedure.
- Check all components for tightness and adjustment, including
handlebars, levers, axles, chain, brakes.
- Check the wheel spokes for tightness. It is normal for spokes to
loosen in operation. PLEASE CHECK after every initial ride, and
then regularly afterwards. If you need guidance please consult a
skilled wheel builder or call OSET customer service.
- Check the speed setting and the response setting before each ride.
- Check the tires for proper inflation. Also, inspect the tires for
damage.
CLEANING:
Cleaning and maintaining your OSET correctly will provide a more enjoyable
ownership and riding experience. By hand cleaning the bike, you can
simultaneously inspect all of the components. We recommend cleaning be done
with a damp cloth and slow running water. Care must be taken when washing.
This is an electric machine, and water should never reach sensitive
components. If a hose is used, cover sensitive parts. Never use a power
washer as it may cause irreparable damage to sensitive components.
WARNING!
Water and electrical components do not mix! Do not get water onto the controller,
throttle or wiring. Failure to follow this instruction could result in permanent
damage, and could cause erratic machine behavior, leading to possible injury or
death.

20
FRONT WHEEL REMOVAL AND INSTALLATION:
Please refer to the section on assembling your OSET bike (page 12) for
information on installing the front wheel, and reverse the instructions for
removal.
REAR WHEEL REMOVAL AND INSTALLATION:
1. Ensure power is switched off and
the key removed.
2. Lift the bike onto a block or stand
so the wheels are off the ground.
3. Loosen the axle bolts.
4. Loosen the chain adjustment
nuts to the point where the wheel
can be pushed forward, and the
chain slipped off to the right of the
sprockets.
5. Pull back on the wheel to remove
it.
To re-install the wheel reverse the above
procedures. Ensure the chain is correctly
adjusted and lubricated, the wheel is
aligned, and all nuts and bolts are tight.