Serfas Dart 350W

OWNER’S MANUAL

DART 350W E-BIKE

www.serfas.com

SERFAS DART 350W

OWNER’S MANUAL

Thank you for purchasing a Serfas Dart 350W e-bike!

Before riding, please take a moment to review these instructions.

Need service or support? Visit our website for quick answers, manuals, and/or give us

a call and we’ll find you a solution.

Dart 350W

Step-Through Frame

CONTENTS

Serfas, Inc

2333 W Utopia Rd

Phoenix, AZ 85027

Phone: 1-(800) 424-0047

Email: [email protected]

Using this manual/General Safety 4

Bicycle specifications

Battery charging

Display and controls

Maintenance and service

Functions

Error indicator

Settings

Lights

Walk assist

Storing your bike

Warranty policy

Error codes

USING THIS MANUAL

GENERAL SAFETY

This manual contains details, information, provides tips and instructions for basic operation, warranty,

and battery safety. This manual may contain warnings, and cautions concerning the safe operation and

use of your new bicycle.

All information in this manual should be reveiwed and followed carefully, should you have any questions

please contact Serfas immediately.

Serfas bicycles are only sold in authorized bicycle dealers and all assembly, and maintenance

proceedures should be completed by an authorized retailer, or certified bicycle mechanic.

This bike has been tested and passed to the UL-2849 standard. Any unauthorized modifications, and/or

use of non Serfas supplied e-bike system components will result in voiding of warranty, compliance to

UL-2849, and create an unsafe riding condition, damage to property, or result in serious injury or death.

INSTRUCTIONS PERTAINING TO RISK OF FIRE or ELECTRIC SHOCK

IMPORTANT SAFETY INSTRUCTIONS

WARNING! When using this product, basic precautions should always be

followed, including the following:

a)Read all the instructions before using the product.

b) To reduce the risk of injury, close supervision is necessary when the product is used near children.

c) Do not put fingers or hands into the product.

d) Do not use this product if the flexible power cord or output cable is frayed, has broken insulation,

or any other signs of damage.

e) This equipment is not intended to be used at ambient temperatures less than -4°F (-20°C) or above

ambient temperatures of 113°F (45°C).

f ) The battery is intended to be charged when the ambient temperature is between 32°F (0°C) and

104°F (40°C). Never charge the battery when ambient temperatures are outside this range.”

WARNING! It is your responsibility to comply with all trafﬁc related laws and to use proper

equipment. This includes appropriate cycling attire and bike maintenance.

Observe all local bicycle traffic laws and regulations.

Observe regulations about bicycle lighting, licensing riding on pavements/sidewalks, bike path and trail

use, helmet laws, child laws relating to cycling, and special bicycle traffic laws, it is your responsibility to

know and obey your local laws.

• When riding a bike, always wear a properly fitted helmet that covers the forehead. Many locations

require specific safety devices. It is your responsibility to familiarize yourself with the local laws, rules,

and regulations where you ride and to comply with all applicable laws, including equipping yourself and

your bike as the law requires.

• Unless otherwise stated, a rider’ s weight and luggage should not exceed 300lbs/136kg.

• Before you ride your bike, always check to make sure everything is working properly and correctly

aligned.

• Be familiar with the controls of your bicycle, such as brakes, pedals and shifting etc..

• Keep all body parts or any obtrusive objects away from the sharp chainrings when pedaling. Failure to

wear proper attire could lead to injuries.

• While riding, remember you are sharing the road or path with others. i.e. motorists, pedestrians and

other cyclists.

• Always be a defensive rider. Always assume that others do no see you and expect the unexpected

• Always be aware of your surroundings. Be alert and responsive to:

1)Motor vehicles of all types and in all directions.

2)Unexpected movement of obstacles.

3)Nearby pedestrians.

4)Children or animals in the area.

5)Imperfections of bike paths or paved roads including potholes, uneven surfaces, loose gravel construc-

tion and debris.

6)Warning, hazard and yield signs.

• Ride in designated bike lanes when available and always ride in the direction of traffic.

• Acknowledge and stop at ALL stop signs and traffic lights.

• When coming to a complete stop, look both ways at street intersections before continuing onward.

• Use hand signals for turning and stopping.

• Do not ride with headphones.

• Never hold onto another vehicle.

• Do not weave through traffic or make unexpected moves or turns.

• Rules that govern the right-of-way for motorists apply to cyclists. A bicyclist should always be

prepared to yield

• Do not ride while under the influence of alcohol or drugs.

• Avoid riding in bad weather when visibility is obscured, for examples dawn, dusk, or in the dark such

conditions increase the risk of accident.

Wet Weather

It is recommended to not ride in wet weather if avoidable. Ride in wet weather only if necessary.

Electric bikes are not meant for use in the heavy rain, or streams. Never immerse or submerge this

product in water or liquid as the electrical system may be damaged.

• In wet weather you need to take extra care when operating this bike.

• Decrease riding speed to help you control the bike in slippery conditions.

•Brake earlier since it will take longer to slow down and come to a stop than when operated in a dry

condition.

• Take care to be more visible to others on the road. wear reflective clothing and use approved safety

lights.

• Road hazards are more difficult to see when wet; proceed with caution.

NIGHT RIDING

Cyclists should exercise extra caution when riding at night. Bicyclists are very difficult for motorists and

pedestrians to see in the dark and in many cases, night riding can be more dangerous than day riding.

Individuals of an appropriate age who are aware of the increased risks should take extra care when

riding at drawn, dusk or at night. Please not that it is important to choose suitable apparel and special

ized equipment when riding in unfavoureable conditions to reduce the risk of injury.

Warning! Reflectors should not be used as substitute for required lighting. Cyclists are near to invisible

for other cyclists and motorists if the necessary lights and reflective gear are not used. If you ride at

night, take all required precautions to make yourself visible through the use of lights and reflectors. Lack

of adequate lighting measures may result in serious injury or death. As a moving cyclist, reflectors are

designed to reflect off of car and street lights to help you become more visible and recognizable when

riding.

Caution! Reflectors and their mounting brackets should be checked regularly to ensure they are clean,

straight and securely mounted. Check to be sure you comply with all local laws about night riding. The

followings are recommended.

• It is important you take steps to enhance your visibility by wearing light-colored, reflective clothing

and accessories. There are plenty of proper reflective gear option that can be worn :

Vests, armbands, leg bands, stripes on your helmet, and blinker attached to your body and or bicycle.

• Make sure your clothing or miscellaneous items do not obstruct the visibility of your reflectors and

lights.

• Make sure that your bicycle is equipped with reflectors for riding at dawn, dusk or at night

• Always ride slowly when riding at night.

Mandatory Equipment and Use Locations

Before riding, ensure you have all required and recommended safety equipment and are following all

laws pertaining to use an electric bike in your region. For example, these laws may specify the need for

mandatory equipment, use of hand signals, and where you can ride.

Changing Components or Attaching Accessories

The use of non-original components or spare parts can jeopardize the safety of your ebike, void your

warranty and, in some cases, cause your ebike to not conform with laws pertaining to your bike.

Safety Check Before Each Ride

Always check the condition of your bike before you ride in addition to having regular maintenance

performed. If you are unsure of how to conduct a complete check of the condition of your bike before

every ride, you should consult a certified, reputable bike mechanic for assistance.

Brakes

Ensure that the brakes and their system components are free from damage, properly secured and

working correctly. When fully squeezed, both front and rear brake levers should not be touching the

handlebar. Take your bike to a certified, reputable bike mechanic to have the brakes repaired if you find

a problem.

Battery Charged, Secured, and Unplugged

Ensure the battery is adequately charged and operating properly. Ensure the battery charger is

unplugged from the outlet, battery, then stored in a safe location before you ride. The battery MUST be

locked onto the frame battery mount properly before use. Do not operate the electrical system if the

battery is removed.Make sure push hard enough while installing the battery into the frame, and hear the

“CLICK” sound.

CHARGER SAFETY INFORMATION

• The charger should only be used indoors in a cool, dry, ventilated area, on a flat, stable, hard surface.

• Avoid charger contact with liquids, dirt, debris, or metal objects. DO NOT cover the charger while in

use.

• Store and use the charger in a safe place away from children.

• Fully charging the battery before each use can help extend the life of the battery and reduces the

chance of over-discharging.

• DO NOT charge the battery with any chargers other than the one originally supplied by Serfas Bikes or

a charger designed for use with your specific bike purchased directly from Serfas Bikes.

• The charger works on 110/240V 50/60 Hz standard home AC power outlets and automatically detects

and accounts for incoming voltage. DO NOT open the charger or modify voltage input.

• DO NOT yank or pull on the cables of the charger. When unplugging carefully remove both the AC

and DC cables by pulling on the plastic plugs directly, and not on the cables.

• The charger is expected to get relatively warmer as it charged. If the charger gets too hot to touch,

you notice a strange smell, or any other indicator of overheating, discontinue using the charger and

contact Aventon Support.

Charge the battery only with the charger originally supplied with the bike from Serfas Bikes, or

a charger purchased directly from Serfas Bikes, designed for use with your specific bike serial

number, as approved by Serfas Bikes. Never use an aftermarket charger, which can result in

damage, serious injury, or death.

Please take special care in charging your bike from Serfas Bikes in accordance with the

procedures and safety information detailed in this manual. Failure to follow proper charging

procedures can result in damage to your bike, the charger, or personal property, and/or cause

serious injury or death.

BICYCLE SPECIFICATIONS

General Warnings

Like any sport, bicycling involves risk of damage, injury, and death. By choosing to ride a bike, you assume

the responsibility for that risk, so you need to know, and practice the rules of safe and responsi ble riding

and the proper use and maintenance of this bike. Proper use and maintenance of your bike reduces risk of

damage, injury, and death.

Biking and controlled substances do not mix. Never operate a bike while under the inﬂuence of alcohol,

drugs, or any substance or condition that could impair motor functions, judgement, or the ability to safely

operate a bike or another vehicle.

The Dart 350W is designed for use by persons 18 years old and older. Riders must have the physical

condition, reaction time, and mental capacity to ride safely and manage traffic, road conditions, and

sudden situations, as well as respect the laws governing electric bike use where they ride, regardless of

age. If you have an impairment or disability such as a visual impairment, hearing impairment, physical

impairment, cognitive/language impairment, a seizure disorder, or any other physical condition that could

impact your ability to safely operate a vehicle, consult your physician before riding any bike.

A Note for Parents and Guardians

As a parent or guardian, you are responsible for the activities and safety of your child. Dart 350 is not

designed for use by children under the age of 18. If you are carrying a passenger in a child safety seat, they

should also be wearing a properly fitted and approved helmet.

Caution! Serfas is not reliable for accidents, injuries or product malfuctions that result from any unautho-

rized changes, modifications or tempering with any part of original specifications.

• Battery Capacity: 36v (13ah/468wh)

• Max Load Capacity: 300lbs / 136kg

• Motor: 36v 350w constant / 500w peak Brushless Hub Drive

• Water/ Dust Resistance: IPX4

• Bike Weight: 61lbs / 28

• Tire Size: 27.5 x 2.35

• Operating Temperature: -20º to 60ºC / -4º - 140ºF

• Charging Temperature: 0º to 45ºC / 32º-113ºF

• Charger Info: Max 42V DC 2.0A

• Max Range: Up to 60 miles (conditions, terrain, rider weight/load,

and motor/throttle useage dependant)

BATTERY CHARGING

The Dart 350W uses a Lithium-Ion battery which can be charged on or

off the bike. We recommend charging the battery off the bike

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

charger from the battery and from the wall outlet.

Take care of the battery to ensure a long service life.

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 Dart

350W for an extended period of time, it’s best to store the battery fully charged.

EVERY 2 MONTHS: Put battery on the charger to maintain optimum level.

After many charging and discharge cycles, runtime and range will be reduced.

Replacement batteries are available from Serfas to extend the life of your e-bike.

The lifespan of the battery is about 500 charge / discharge cycles for properly

maintained batteries.

When you install the baterry on the Dart 350W, it locks into place automatically. To

unlock for removal, use the supplied key.

DO NOT ride the bicycle if the battery rattles or moves - it should be firmly

attached.

• 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.

Throttle function

This bike has been programmed for continuous use of the throttle above

2mph. Throttle will not work until bike is moving above the 2mph threshold.

Once above threshold throttle will work with on demand.

DISPLAY AND CONTROLS

Power On the Display

The battery must be in the "I" position for the

system to power on.

When not using the bike place the battery in the "O"

position.

Power indicator Battery charge level shown in percentage and visual gauge.

Current speed and unit: shows the current riding speed, default unit is MPH.

Trip and ODO: default unit is miles, maximum Trip value is 9999, maximum ODO value

is 9999

Error code indicator: shows the error code accordingly in the function area.

6 power assist levels, including off level (off means no assist power).

Basic interface and operation

Trip function

ODO function

Range function

Average speed function

Max speed function

Error code indicator

Light control

Walk assist function

Touch pad buttons

Error code

MAINTENANCE AND SERVICE

STORING YOUR BIKE

• 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 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.

• Keep tires inflated to their recommend pressure (30-50 PSI /

2.0-3.5 BAR / 200-350 KPA) and check weekly.

• Clean the drivetrain and lubricate the chain (monthly).

All bicycles will need a periodic tune-up or adjustments by a profes-

sional. 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:

From time to time, you may wish to store your bike for an extended

period without riding. Proper storage can help prolong the life of

your e-bike components and battery.

To ready your bike for storage, first fully charge the battery. Then

remove the battery from the bike and store it separately. Removing

the battery from the bike puts it into a low-voltage state designed

for long term storage.

Keep both the bike ad the battery in a cool, dry place. Avoid both

very hot and very cold temperatures. Generally if the environment is

comfortable for humans, then it’s a good place to store your bike.

Store your bike away from sources of heat, UV light, and ozone - all

of which can prematurely age rubber tires and tubes.

All bicycle tubes slowly lose air over time and need to be regularly

topped off to maintain proper pressure. This does not mean that

your bicycle has a flat tire. Avoid allowing the tires to deflate

completely during storage.

LIMITED LIFETIME WARRANTY

The specific warranty covering your Serfas bicycle is governed

by the law of the state or country in which it was purchased,

and applies only to bicycles purchased from Authorized Serfas

Retailers.

FRAMES AND FORKS:

Serfas frames made from steel or aluminum (Dart e-bikes) are

warranted by Serfas Bikes, 2333 W. Utopia Rd., Phoenix, AZ

85027 against manufacturing defects in materials and/or

workmanship for 2 years to the original owner.

COMPONENTS:

All other components, frame fixtures, and finishes (paint and

decals) are warranted against manufacturing defects in

materials and/or workmanship for a period of one year from the

date of original retail purchase. Forks (other than those made

by Serfas - for example, a Rockshox suspension fork) are not

covered by this limited warranty, but are separately covered by

the stated warranty of their manufacturer. Stripped threads due

to user error are not covered by this warranty.

To qualify for warranty coverage, bike must be registered within

1 month of purchase at below address.