aventon SINCH User manual

SINCH OWNER’S MANUAL
(THROTTLE ON DEMAND)

AVENTON SINCH OWNER’S MANUAL
Thank you for purchasing an Aventon Sinch ebike! Before riding,
please take a moment to review these instructions.
ASSEMBLY INSTRUCTIONS
To view the assembly instructions to your Aventon ebike, visit the
product page on our website, there you will find a step by step
assembly video. If you aren’t comfortable with the steps shown,
you can use a local bicycle shop or mobile repair and assembly
service, like Velofix, or Velotooler to assemble the bike for you.
We recommend Aventon Elite bike shops, you can find that list on
our website, but any qualified bike shop can help.
Need service or support? Visit our website (www.aventon.com) for
quick answers, manuals, and live chat support. Or give us a call
and we’ll find you a solution.
Aventon Bikes
1950-B S. Grove Avenue
Ontario, CA 91761 USA
Phone: [phone]
Email: [email protected]
Version 1.1.2 (August 1, 2020)
Latest version can be found: www.aventon.com

CONTENTS
Display / Control Specifications
Getting Started
What’s on the Display?
Using the Controls
Customizing the Display
• Function 01P Backlight Brightness
• Function 02P Unit of Measure
• Function 03P Battery Voltage
• Function 04P Wheel Size
• Function 05P Speed Limit
Battery and Charging
Adjusting Suspension Fork
Maintenance and Service
Safety
Safe Starting & Stopping
Error Codes and Troubleshooting
Battery Troubleshooting
Frequently Asked Questions
Notes
1
2
3
4
5
5
5
5
6
6
7
9
10
11
12
14
20
22
24

SINCH OWNER’S MANUAL
1
DISPLAY / CONTROL SPECIFICATIONS
• 48 Volt Power Supply
• Current Rated: 10mA
• Maximum Operating Current: 30mA
• Power O Leakage Current < 1uA
• Operating Current to Controller: 50mA
• Operating Temperature: -18º to 65ºC
• Storage Temperature: -30º to 80ºC
Display Panel
Control Pad
(Side View)
(Side View)

SINCH OWNER’S MANUAL 2
GETTING STARTED
The Sinch is operated using the control pad on the handlebars.
The control pad is located near the left-hand brake lever.
Press and hold the “M” button on the handlebar controls to turn
and hold “M” for 3 seconds.
pedal assist, simply start pedaling, then tap the “U” or “D” arrows
to increase or decrease the amount of pedal assist from 0-5.
Pedal assist will engage at speeds up to 20 MPH / 32 KPH.
The Sinch ebike is equipped with a throttle, which is mounted
near the rider’s left thumb, to propel the bike without pedaling.
You can engage the throttle anytime including from a complete
stop while in PAS 1 through 5. However, we strongly encourage
you to pedal first before engaging the throttle. The throttle can
propel you at speeds up to 20 MPH.
The motor stops when you: stop pedaling, squeeze the brake
levers, or release the throttle. Simply start pedaling again to re-
engage the motor.

SINCH OWNER’S MANUAL
3
WHAT’S ON THE DISPLAY
While you are riding, you can use the display to monitor your
speed, the amount of pedal assist, battery life remaining, and
other data.
As shown below, your Sinch uses a LCD display screen that looks
like this:
SPEED INDICATOR
(Current / Max / Average)
5 LEVELS OF ASSIST
(0: No Assist. 5: Max Assist)
WALK MODE
(On / O)
DISTANCE INDICATOR
(Current Trip / System Mileage)
ERROR CODE INDICATOR
(In the Event of a Problem)
BACKLIGHT INDICATOR
(On / O)
ENERGY BAR
(Displays Battery Charge Level)
VOLTAGE OUTPUT INDICATOR
(Real-Time)

SINCH OWNER’S MANUAL 4
USING THE CONTROLS
To turn on your bike, press and hold the “M” button for 3 seconds.
To turn o, press and hold the “M” button for 3 seconds. The
display and battery have an energy-saving feature, if there is no
activity for 10 minutes, they will turn o automatically to preserve
battery life.
Tap the “U” or “D” arrows to change the level of pedal assist.
Hold “U” and “M” for 3 seconds to switch between showing real-
time speed, average speed, and max speed.
Tap “M” to toggle between the display of the Odometer, Trip
Distance, Voltage, and Elapsed Time.
Press and hold “U” for 3 seconds to enable the backlight on the
display. Press and hold “U” again for 4 seconds to turn it o.
To enable walk mode, first come to a complete stop and stand
next to the bike. Press and hold “D” for 3 seconds. The bike will
slowly move forward at 3.5 MPH / 6 KPH as long as you hold the
“D” button. This feature is useful for pushing the bike up a hill or
walking through a crowd, where you cannot safely ride.
To use the walk mode, set the pedal assist to level 1-5. Walk mode
will not engage at pedal assist level 0.

SINCH OWNER’S MANUAL
5
CUSTOMIZING THE DISPLAY
You can use the settings features of the display to customize the
Sinch for your use. To enter the “Settings” mode, hold the “U” and
“D” buttons at the same time for 2 seconds.
You can customize 4 out of the 5 dierent functions on the
display. Tap the “M” button to move from function to function, and
use the “U” and “D” arrows to adjust each to your preferences.
When you are finished, press and hold the “M” button to
save your changes. Note: The system will save your changes
automatically after 8 seconds.
FUNCTION 01P - BACKLIGHT BRIGHTNESS
You can control how bright you’d like the display backlight
to be. 1 being the dimmest and 3 is the brightest.
FUNCTION 02P - UNIT OF MEASURE
You can toggle between miles or kilometers, based on your
preference.
FUNCTION 03P - BATTERY VOLTAGE
This function sets the battery voltage of the system. On the
Sinch, this function is locked at 48V to match the battery
and motor, and cannot be changed.

SINCH OWNER’S MANUAL 6
FUNCTION 04P - WHEEL SIZE
This function can be used to change the wheel size to
16, 18, 20, 22, 24, 26, 27.5, or 28” wheels. The Sinch
comes stock with 20” wheels, which is the default and
recommended setting. Note: Selecting the incorrect
wheel size will aect the accuracy of the bike’s speed, the
odometer, and the functionality of its pedal assist.
FUNCTION 05P - SPEED LIMIT
The Sinch is a Class II ebike. This designation carries a
pedal assist limit of 20 MPH (32 KPH). You can pedal faster
without assist, but the motor will stop providing assist
when the speed limit is reached. You can use the Speed
Limit function to change the speed limit based on your
preferences and the law in your area. The Speed Limit
function can be set from 20-51 KPH (for reference, that is
12.4 - 31.7 MPH) and is always set in KPH. You should only
set the Speed Limit to a value that is safe and legal in your
community. This function does not aect the max speed on
throttle, which is locked at 20 MPH (32 KPH).

SINCH OWNER’S MANUAL
7
BATTERY AND CHARGING
The Sinch uses a Lithium-Ion battery which can be charged on
or o the bike. We recommend charging the battery indoors, in
moderate temperature conditions. To charge the battery, plug the
charger into the charging port and then connect the charger to a
wall outlet. The LED indicator light will be red when charging and
will turn green when charging is complete. When finished, unplug
the the charger from the wall outlet.
Take care of the battery to ensure a long service life:
• Charge and store the battery indoors if possible. The
battery can be removed from the bicycle for this purpose.
• Avoid extreme hot and cold temperatures.
• DO NOT submerge your bike or any of the components in
water. This action will void the warranty.
To optimize the performance of the battery over time, try and use
it (discharging and charging) at least monthly. But if you won’t
be riding your Sinch for a long period of time, it’s best to store
the battery fully charged. After many charging and discharge
cycles, runtime and range will be reduced. Replacement batteries
are available from Aventon to extend the life of your ebike. The
lifespan of the battery is about 500 charge / discharge cycles.
The Sinch internal battery slides onto a track inside the frame.
When installing the battery, take care to ensure the rails on the
bottom of the battery correctly engage to the track of the frame.

SINCH OWNER’S MANUAL 8
When you install the battery on the Sinch, lock it into place with
the supplied key. To unlock it for removal, use the key. Do not
ride the bicycle if the battery rattles or moves - it should be firmly
attached.

SINCH OWNER’S MANUAL
9
ADJUSTING THE SUSPENSION FORK
Sinch features an RST Guide suspension fork to help you ride
with more comfort and control. The fork features two adjustments
to fine-tune its performance. You can use these adjustments to
suit various rider weights and riding styles.
PRELOAD ADJUSTMENT
You can find the preload adjustment knob on the top of the
left (from the rider’s perspective) side of the fork crown.
Turn the knob clockwise to increase the spring preload and
counter-clockwise to decrease the spring preload. Bigger,
heavier riders will want more spring preload, and lighter,
more cautious riders need less. As a general guideline, if
the fork doesn’t move much on bumps, less spring preload
is needed; if the fork frequently bottoms out (reaches the
end of its travel) then more spring preload is needed.
LOCKOUT
The lockout knob is located on top of the right (from the
rider’s perspective) side of the fork crown. Engaging
the lockout stops the fork from moving at all. This is
useful on smooth roads or extended uphill pavement
when no suspension is needed. If you find the fork
movement undesirable for the conditions, turn the knob
counterclockwise to engage the lockout. Turn the knob
clockwise to disengage the lockout when done. Avoid
riding the bike on rough terrain with the lockout engaged.

SINCH OWNER’S MANUAL 10
MAINTENANCE AND SERVICE
Properly maintaining your Sinch ensures its longevity and smooth
operation. Before assembling your bike, please watch the
“How To Assemble” video we’ve prepared for you. If you have
questions during the assembly process, please contact Aventon
at [phone] or email [email protected].
Once you’re up and running, please make sure to:
• When cleaning your bike, use a damp cloth and gentle dish
soap. Note: DO NOT use a pressure washer or sprayer.
• Periodically apply a light bicycle lubricant to moving parts,
including the links of the chain, derailleur pivots, and shifter
cable inner wire where it enters the cable housing.
• If you ride in wet / humid environments clean and dry
electric connections and apply an anti-corrosive.
All bicycles will need a periodic tune-up or adjustments by a
professional. An annual “check-up” is beneficial. Your bike’s
service schedule will depend on the frequency of its use. In
between expert services at a bike shop, we suggest:
• Keep tires inflated to their recommended pressure found
on the sidewall and check weekly.
• Clean the drivetrain and lubricate the chain (monthly)
For more information about further recommended maintenance,
we suggest the excellent video series oered by Park Tool on
Youtube.

SINCH OWNER’S MANUAL11
SAFETY
You should wear an approved bicycle helmet every time you
ride a bicycle, regardless of the legal requirement to do so.
Additionally, some jurisdictions require helmet use when riding
Class II ebikes like the Sinch. You should comply with local law
when riding your Aventon bicycle.
Your Sinch comes with reflectors and we encourage you to install
and use them. Reflectors are not a substitute for lights, which are
not included with your bicycle. You should purchase, install, and
use front and rear lights when riding in dim or dark conditions.
Some jurisdictions restrict where ebikes can and cannot be
ridden. These limits may include specific speeds and motor
wattages. Your Sinch is a Class II ebike, 500 watts with pedal
assist up to 20 MPH and throttle up to 20 MPH. You should only
ride it where it’s legal and safe.
Your Sinch will run without the throttle plugged in. You can
remove the throttle to comply with local regulations if needed.
With throttle on demand, you can throttle the bike form a
complete stop. This feature is to help give you that extra push
when you need it on a steep hill, when hitting multiple stops
signs, etc. However, we strongly recommend to pedal first and
throttle second to ensure proper stability and preparedness.

SINCH OWNER’S MANUAL 12
SAFE STARTING & STOPPING
Remember that if pedal assist is turned on, the motor will turn on
and begin to push you forward anytime the pedals rotate (even if
you rotate the pedals unintentionally.) That could be unsafe if you
weren’t expecting the motor to turn on.
You should turn o pedal assist (by setting the display to level
zero) when you are not using it to prevent accidentally engaging
the motor on your ebike.
The Sinch throttle can be engaged anytime while on PAS 1
through 5. Keep hands and fingers away from the throttle to
prevent accidental engagement.
The motor interrupt brake levers on Aventon ebikes stop
the motor from running when they are squeezed. This adds
an additional measure of safety - when you are sitting on, or
straddling the bike, but not moving, (for example, when stopped
at a stoplight) get into the habit of squeezing the brake levers.
This habit stops you from accidentally engaging the motor.
Release the brake levers when you begin riding and intend to
use pedal assist again.
The motor interrupt brake levers can also be used to control your
speed in areas where pedal assist is not desired. For example, if
you are riding at slow speed through a farmer’s market or
downtown pedestrian mall, you can pedal to propel the bike
forward, while simultaneously lightly dragging the brakes. This
allows you to ride without the motor turning on at all.

SINCH OWNER’S MANUAL
13
When you’re completely done riding your bike, power o to
prevent accidentally engaging the motor while parking. Never
leave your ebike powered on when parking, hanging from a hook
in the garage, or while loading your ebike onto a car or truck rack
for transport.
If your ebike ever needs repairs or maintenance (for example:
to fix a flat tire) always completely power down the ebike before
starting work.

SINCH OWNER’S MANUAL 14
ERROR CODES AND TROUBLESHOOTING
In the event of a problem with the electrical components of your
bike, the display will show an error code. Compare the code with
this list below and HOW TO RESOLVE:
CODE ERROR HOW TO RESOLVE
21
Current
Error
Current Limit
Exceeded
or
Damaged
Cable
1. Stop riding and let the bike cool
down for 2 minutes to see if the
error code disappears. If the error
code persists, check to confirm that
the motor and controller cables are
properly connected, also check cables
for damage or wear and tear on the
connectors.
2. If a second Aventon compatible ebike
is present, connect the motor to a
known-good working controller see if
motor works correctly. If the motor runs
normally on a dierent controller, then
replace the controller on the aected
bike. If the motor doesn’t work with the
known-good working controller, then
replace the motor.
22
Throttle
Error
Damaged
Throttle Cable
or
Throttle Hall
Sensor
When you press and release the
throttle, it should return to the original
position. Remove any obstructions.
Check the throttle and throttle cable for
damage, such as a cut or frayed cable.
Disconnect and re-connect the throttle
cable, if this fails to resolve the error
code, replace the throttle assembly.

SINCH OWNER’S MANUAL
15
23
Motor Phase
Error
Damaged
Motor Phase(s)
or
Damaged
Controller
Check the cable that connects the rear
hub motor to the rest of the system
and make sure it is free from grit or
contaminants and is firmly connected.
This error might appear if you don’t
reconnect the cable after removing
the rear wheel (for example, after
changing a flat tire.) At least one of the
motor phase wires has been damaged
or is disconnected. If checking the
connection doesn’t resolve the error,
replace the motor; replace controller if
a new motor doesn’t solve the issue.
24
Motor Hall Sensor
Error
Motor Cable
Not Connected
or
Damaged
Motor Hall Sensor
If you have confirmed that the motor
cable is properly connected, service or
replace the rear hub.
25
Brake
Error
Loose
Brake Inhibitor Sensor
or
Brake Has Been Engaged
for More Than 5 Secs
The Sinch uses special brake levers
that stop the motor when you apply
the brakes - built in “magnetic reed
switches” disengage the motor’s power
when the lever is squeezed. If the lever
is damaged (for example, following a
crash), it might need to be replaced.
26
Overheat
Protection
Overheated
Due to Heavy Use
Turn o the bike, allow the components
to cool, then try again to see if the
error code disappears. If this does not
resolve the issue and the error code
remains even when the bike is cool,
replace the controller.

SINCH OWNER’S MANUAL 16
27
Motor Lock
Protection
Hub Motor
Encounters Resistance
Remove the bike from the obstacle,
power o, and power on again to
resume riding.
28
Low
Voltage
Voltage Too Low
to Operate
The voltage supplied by the battery is
too low to operate the bike. Charge
the battery and try again. If the issue
persists, check the voltage output on
the battery terminals using a volt meter.
If a fully-charged battery does not
output the correct voltage on the volt
meter, battery needs to be replaced.
29
Over
Voltage
Battery Supplying Too Much
Voltage to Controller
Make sure you are using the correct
battery for your bike. For example, the
48V Pace 500 battery cannot be used
to power the 36V Pace 350 ebike, even
though they look similar.
30
E1E
Communication
Error
Controller Has No or
Poor Connection to Display
Check all cable connections between
the controller and the display and that
the connectors are undamaged and not
contaminated with grit. If this does not
resolve the issue, replace the display. If
the bike does not work correctly with a
new display, replace the controller.

SINCH OWNER’S MANUAL
17
38
Battery Voltage
Error
Low Voltage from Battery
or
Wrong Battery
Use the display to view the real-time
voltage being output from the battery
to confirm it is correct. It can also be
checked at the battery terminals using
a volt meter. If the battery is old and has
been charged/discharged many times, it
may need to be replaced.
NO
CODE
No
Pedal Assist
Damaged
Cadence Sensor
Confirm all cables are connected, then
test the bike by using walk mode. If
the motor works when using walk
mode, but not pedal assist, replace the
cadence sensor found under the left-
side crankarm.