YOUNG ELECTRIC Bicycle Owner's Manual

Introduction

Thank you for choosing a YOUNG ELECTRIC bicycle! YOUNG ELECTRIC bikes are designed to make your riding experience a pleasure. Carefully read this Owner's Manual before assembly and first ride. It will provide all the information necessary for assembly, adjusting, and maintenance of your bike.

YOUNG ELECTRIC works hard to guarantee a properly assembled and correctly adjusted bicycle. If you have questions after reading this manual, please contact our Help Center. Our customer service staff can answer questions regarding assembly, performance, operation, service parts, or general service.

Email: ebike@forcome.com

About this Manual

YOUNG ELECTRIC is not liable for accidents or injuries due to improper use, failure to adhere to instructions, or product modifications. While efforts have been made to ensure accuracy, YOUNG ELECTRIC is not liable for errors or omissions. Keep this manual for future reference. Content is subject to change as products are refined.

This manual contains warnings, cautions, and notes for your safety. Read all information carefully and share it with others before operating the bike for the first time. Pay special attention to information preceded by warning or caution symbols, and notices.

Proper maintenance and care are essential for retaining the original quality and safety of your bicycle.

Maintenance, Adjusting, and Repairs

To reduce risks, regularly inspect your bicycle and have it repaired at authorized distributors or service shops. Assembly and adjustment may require special tools and skills. It is recommended that assembly and adjustment be completed by a certified, reputable bike mechanic.

Table of Contents

• YOUNG ELECTRIC BICYCLE OVERVIEW
• SAFETY PRECAUTIONS
• ASSEMBLY INSTRUCTIONS
• BATTERY CHARGING & STORAGE
• PRE-RIDING CHECK
• HMI CONTROL
• MAINTENANCE
• LIMITED WARRANTY

Bicycle Overview

The YOUNG ELECTRIC bicycle consists of the following main components:

• 1. Shift Lever: Controls gear changes.
• 2. Right Brake Lever: Operates the front brake.
• 3. Left Brake Lever: Operates the rear brake.
• 4. Handlebar: Steering control.
• 5. Suspension Fork: Supports the front wheel and provides suspension.
• 6. HMI (Human-Machine Interface): The display and control unit.
• 7. Front Light: Illuminates the path ahead.
• 8. Front Wheel: The front wheel assembly.
• 9. Frame: The main structural component of the bicycle.
• 10. Saddle: The seat for the rider.
• 11. Battery: Powers the electric motor.
• 12. Reflector: Enhances visibility.
• 13. Electric Motor: Provides power assistance.
• 14. Pedal: For rider propulsion.
• 15. Crankarm: Connects pedals to the bottom bracket.
• 16. Rear Derailleur: Shifts gears on the rear wheel.
• 17. Rear Wheel: The rear wheel assembly.
• 18. Kickstand: Supports the bike when stationary.

The handlebar unit features the HMI display, showing speed, battery level, assist level, and other information. It also includes control buttons for power, lights, and mode selection.

Safety Precautions

Safety signal words and symbols alert you to potential hazards. Failure to pay attention may result in property damage, injury, or death.

⚠️ WARNING: Indicates a hazard or unsafe practice that can result in severe injury or death if safety information is not followed.

⚠️ CAUTION: Indicates a hazard or unsafe condition that could result in minor injury if safety information is not followed.

ℹ️ NOTICE: Indicates information requiring special attention, not related to physical injury.

Always perform a complete check before riding and thoroughly read the safety section.

Electric Bicycles can be dangerous. The user assumes all risk of personal injuries, damage, or system failure.

Never disassemble, modify, or replace electrical parts.

Always wear an approved helmet. Familiarize yourself with and comply with all local riding laws.

Riding at Night or in Bad Weather

Wear reflective clothing and a reflective vest. Ensure the headlight and white reflector are in place and functional. Check rear red reflectors and wheel reflectors.

In rain, braking distances increase, and visibility and traction are reduced. Allow extra stopping distance and exercise extra caution on wet surfaces. Avoid riding on ice and in snow.

Access to Pathways, Responsible Riding, and Code of Good Riding

⚠️ WARNING: All frames and components should be checked regularly for signs of wear or breakage (cracks, corrosion, breaks) to prevent accidents and injuries.

Your behavior influences pathway accessibility. Limit skidding, avoid muddy areas, and be courteous to walkers and horse riders.

Assembly Instructions

This section provides a general guide for assembling your e-bike. For comprehensive details, consult a certified bike mechanic.

YOUNG ELECTRIC Bicycle Assembly Checklist

• 1. Main Bike Assembly
• 2. Kickstand
• 3. Left Pedal
• 4. Right Pedal
• 5. Tool Kit
• 6. Lever
• 7. Charger
• 8. Charger Cable
• 9. Key x 2
• 10. Master Carton
• 11. Accessory Box
• 12. Owner's Manual

Tool Kits Included: X1 Wrench, M6X1 Allen Wrench, M5X2 Allen Wrench, M4X1 Allen Wrench.

Step 1: Unboxing

Open the shipping carton and carefully remove the bike from the bottom tray. Place it on a soft surface to prevent scratches. Remove all zip ties and protective covers (scissors not included).

Step 2: Install Kickstand

The kickstand comes with 2 bolts. Remove the bolts using the M4 Allen wrench. Position the kickstand under the bike. Thread the bolts by hand into the kickstand and tighten with the M4 Allen wrench.

Step 3: Install Front Wheel

Remove the front axle bolt and shipping bracket from the front fork. Remove plastic caps from the front wheel hub. Insert the front wheel into the fork dropouts, ensuring the brake disc is centered in the caliper. Insert the quick release axle bolt into the front wheel hub and tighten firmly by hand. Do not over-tighten or use tools for leverage. Ensure there is no play in the front wheel.

⚠️ WARNING: Never touch the brake rotor, especially when the wheel is in motion. Fingers can be injured by sharp edges. Grease or oil on the rotor can reduce brake performance.

Step 4: Install Handlebars

Remove the handlebar clamp screws using the M5 Allen wrench. Insert the handlebar into the stem and reinstall the clamp. Align handlebars with the front wheel before tightening. Ensure the stem is not set above the maximum height indicator. Tighten all screws evenly in a crosswise pattern. Adjust handlebars to the preferred position before final tightening. Tighten the 2 bolts on the stem evenly for maximum stability.

⚠️ WARNING: Ensure all fasteners are torqued correctly. Loose handlebars can cause loss of control and serious injury. Do not extend any component beyond the minimum insertion mark.

Step 5: Install Pedals

Pedals are marked "L" (Left) and "R" (Right). Install the "R" pedal on the right crank arm and the "L" pedal on the left crank arm. Use the provided wrench to attach and tighten the pedals.

Step 6: Adjust Saddle Height

Open the seat post quick fastener lever. Adjust the saddle height as needed. Close the lever securely. For safety, the saddle should not be raised above the marker on the seat post.

ℹ️ NOTICE: Rider's leg should be slightly bent when the pedal is closest to the ground, with the ball of the foot on the pedal.

⚠️ WARNING: Always check that all latches, levers, and quick releases are properly secured and undamaged before every ride. Loose parts can lead to loss of control and injury.

Step 7: Install Battery

Slide the battery forward into the battery holder. Turn the key clockwise to lock the battery to the bike. The battery must be locked when riding to prevent it from falling out. The key does not need to be in the lock to operate the bike.

Step 8: Final Checks

Remove any remaining packaging or plastic caps.

Battery Charging & Storage

Battery Charging

Connect the charger to the battery. A red light on the charger indicates charging; a green light indicates the battery is fully charged. A completely discharged battery requires approximately 5.5 hours to charge. The battery can be charged on or off the bicycle.

Charging times:

• 50%: 2.5 hours
• 80%: 4.5 hours
• 100%: 5.5 hours

Battery Storage

⚠️ CAUTION: Deep discharge can cause internal short circuits. High temperatures can cause fire. Avoid deep discharge during use and storage. If not in use, charge the battery at least once every 3 months.

• Do not store the battery in environments below -20℃ (-4°F) or above 45℃ (113°F).
• Avoid fluctuating temperatures; ideal storage is 10℃ (50°F) to 25℃ (77°F).
• Protect against moisture to prevent corrosion of electrical contacts; store in a dry environment.
• Do not store near flammable items.

The battery enters offline mode if the e-bike is unused for 2 months, or if the battery is depleted and not charged for 3 months. Charge fully before returning to use.

Battery Information

To ensure longer battery life:

• Charge at ambient temperature close to 20℃ (68°F).
• Avoid frequent full discharge; partial discharge improves battery life.
• Lithium-Ion cells can reduce capacity over time due to usage and aging.
• Deep discharge causes irreversible damage. Charge at least every 3 months if unused.
• Do not immerse the battery in water.
• Do not attempt to repair or disassemble the battery or charger.
• Do not use a battery with a damaged case.
• Keep the battery away from children.
• Stop using the battery immediately if it becomes hot, emits odor, or has a distorted housing.

Battery Charging Information

⚠️ WARNING: Damaged, wet, or dirty power cables/sockets can cause fatal electric shock. Stop charging if the battery becomes too hot, emits odor, or shows signs of overheating. Ensure no flammable materials are near the battery during charging. Charge on a non-flammable surface.

Charger Information

The provided charger supports 100-240V and automatically detects the supply voltage. Unplug the charger when not in use.

⚠️ WARNING: Use only the original YOUNG ELECTRIC charger. Aftermarket chargers can cause damage, injury, or death.

Charger Connection

Place the battery and charger on a solid, non-flammable surface with ports horizontal. To check battery capacity, turn on the system. Unplug battery and charger when not in use.

Connect the charger to the battery. The indicator light is red when charging and green when fully charged. There is no switch on the charger; disconnect when complete. Do not pedal while charging. The battery can be charged on or off the bicycle.

Pre-Ride Check

Perform these checks every time before riding your bike:

Wheels and Tires

• Ensure tires are inflated to recommended limits.
• Inspect tires for good tread, bulges, cuts, or embedded objects.
• Ensure rims are undamaged, true, and not wobbly.
• Check all spokes are tight and unbroken.
• Make sure axle nuts or quick release levers are tight and secure.
• Ensure reflectors are securely positioned on both wheels.

Brakes

• Ensure front and rear brakes function properly.
• Test brake levers: they should move freely, be firm, and not touch handlebar grips when pulled fully.
• Ensure motor cutoff and brake light functions are correct.
• Check brake pads for correct positioning, free movement, and minimal wear.
• Inspect brake rotors for damage or tangled objects.
• Ensure brake cables are adjusted correctly, lubricated, and undamaged.
• Verify brake caliper fasteners are secure, not leaking fluid, and undamaged.

Steering

• Ensure handlebars and stem are correctly adjusted, fasteners tight, and they turn freely.
• Check handlebars and stem alignment with the front wheel.
• Ensure handlebar grips are secure and show minimal wear.

Chain

• Ensure the chain is clean, well-lubricated, and runs smoothly.
• Check for unusual chain noises or squeaks.
• Ensure no foreign material or corrosion is present in chain links.

Bearings

• Ensure bearings in the headset, lower bracket, pedals, and wheels turn freely.
• Inspect for excess movement, rough feeling, grinding, rattling, or noise.

Cranks and Pedals

• Make sure pedals are securely tightened to the crank arms.
• Ensure pedals turn freely and are not bent or damaged.
• Verify crank arms are securely fastened to the bottom bracket shaft and are not bent.

Rear Derailleur, Shifter, and Cable

• Check derailleur adjustment and function.
• Ensure shifter operates properly through all gears.
• Check chain for noise in all gears.
• Ensure derailleur moves freely, is free of tangled objects, and the shift cable is securely attached.
• Ensure shift cable is undamaged and properly adjusted.

Frame, Fork, and Seat

• Make sure the frame and front fork are not bent or damaged.
• Inspect frame and fork for paint cracks at welded joints, which may indicate damage or a broken weld.
• Ensure the seat is properly adjusted and the quick release is securely tightened.
• Ensure both wheels are evenly spaced in the front fork and rear frame.

Motor and Rear Wheel Assembly

• Ensure the hub motor spins smoothly in both directions.
• Check motor power cable for damage and secure attachment to the frame.
• Verify hub motor bolts are tight and dropouts show no damage.
• Ensure spokes are tight and undamaged.

Battery

• Make sure the battery is fully charged before use.
• Inspect battery for damage, ensure electrical connectors and mounting features are in good condition.
• Insert battery into lower mount and rotate into upper mount, ensuring it is held firmly by the lock.
• Pull lightly on the battery to confirm it is securely locked.
• Turn on the HMI display to confirm battery engagement and charge level.

Electrical Cables and Lights

• Inspect all visible electrical connectors for complete connection.
• Ensure cable grommets are properly positioned to prevent damage.
• Check cable insulation for damage and exposed wires.
• Inspect cables under the bottom bracket for damage.
• Turn on the bike to test headlight, taillight, and brake lights.

Accessories, Other, and PPE

• Ensure all reflectors are securely attached and visible.
• Verify rear rack and other accessories are securely fastened.
• Check fenders and mounting hardware are secure.
• Ensure the kickstand functions properly and fasteners are tight.
• Inspect helmet and other PPE for damage and proper function.
• Ensure the rider is wearing a helmet, required PPE, and is familiar with riding laws.

HMI Control

⚠️ WARNING: Using Power Assist or controls while riding can be distracting and reduce control, potentially causing injury. Access controls only under proper traffic conditions and after parking the bike safely. Changing Power Assist levels on slippery surfaces can cause loss of control; reduce speed and use extra caution.

Operation

• ON: Ensure battery is installed and locked. Press the power switch for over 3 seconds. The HMI display will activate, showing assistance level, speed, battery capacity, distance, etc.
• OFF: Press the power switch for over 3 seconds to turn off the screen.

HMI Display Indicators

• 6km/h Rear Wheel Boost: For walking assistance.
• Error Indicator: Lights up when a system failure is detected. Take the bike to an authorized service center.
• Battery Capacity: Indicated by a bar showing 5 levels (approx. 20% each). Flashes when capacity is below 5%. Charge before it flashes to maximize battery life.
• Pedal Assist: Shows the current assist level.
• Distance/Riding Time/ODO meter: Displays trip distance, riding time, or total distance.
• Diagnostic Toll Connect Indicator: For system diagnostics.
• Light "ON" Indicator: Shows when the front light is active.
• Power Indicator: Shows battery status.
• Speedometer: Displays current speed.

Control Buttons

The handlebar unit includes control buttons for the front light, mode selection (M button), and power.

Rear Wheel Boost Mode

Press the boost button for 3 seconds while walking to activate 6 km/h (3.7 mph) assistance. Use only while dismounted and with both hands on the handlebars. Keep a hand on a brake lever for quick motor cutoff.

Front Light

Press the light button for 3 seconds to turn the front light on and activate the light indicator. Press again for 3 seconds to turn it off.

Power Assist Modes

Press the ▲ or ▼ buttons to change the power assistance level (ECO, TOUR, SPORT, TURBO, BOOST). Higher levels increase power and acceleration but reduce riding range. Adjust levels based on riding conditions and preference.

Display Information

Press the M button to cycle through display information:

• Trip Ø Average Speed (KM/H): Average speed for the current trip.
• ODO/MAX: Total travel distance of the e-bike.

Interface Setting

Hold the M button for 3 seconds within 10 seconds of turning power on. Press M to cycle through settings, and ▲/▼ to adjust:

• Unit (km/mile): Set preferred unit of measurement.
• Backlight Intensity: Adjust display brightness.
• Sleep Time: Set display sleep timer.
• Time: Set the current time.

Carrying Loads

The maximum weight limit for the YOUNG ELECTRIC bike is 242 lb. (110kg), including rider and cargo. The rear rack limit is 59 lb. (27 kg.).

Always secure all items to prevent them from falling off. Carry cargo as low as possible to improve handling and balance. Ensure cargo does not interfere with bike components or drag on the ground.

Carrying loads involves additional risks. Braking, acceleration, and balance are affected. Practice riding with loads in a safe, open area. Never exceed weight limits.

⚠️ WARNING: Exceeding weight limits can damage the bike or rack and cause loss of control. Never carry passengers or oversized objects that may interfere with the rider.

Maintenance

Basic Bike Care

Proper maintenance ensures safe riding. Follow these guidelines and consult a certified mechanic regularly.

Maintain batteries by keeping them fully charged when not in use for more than two weeks.

• Never immerse the bike or components in water or liquid, as this can damage the electrical system and void the warranty.
• Periodically check wiring and connectors for damage and security.
• To clean, wipe the frame with a damp cloth, using a mild detergent if needed. Dry with a clean, dry cloth.
• Store the bike under shelter, avoiding rain or corrosive materials. If exposed to rain, dry thoroughly and apply anti-rust treatment to unpainted steel parts.
• Riding in coastal areas exposes the bike to corrosive salt. Wipe down frequently and use anti-rust treatment on unpainted parts. Corrosion damage is not covered by warranty.
• If hub and bottom bracket bearings have been submerged, they should be re-greased to prevent deterioration.
• If paint is scratched or chipped, use touch-up paint or clear nail polish to prevent rust.
• Regularly clean and lubricate moving parts, tighten components, and adjust as needed. Inspect hardware for proper torque and secure attachment.

Cleaning Your E-bike

⚠️ WARNING: Never immerse the bike or components in water or liquid. Never use high-pressure water jets. Always store the bike in a dry location and dry it thoroughly after riding in rain or washing.

• Remove the battery pack before cleaning.
• Use a damp cloth with mild soap to clean the battery exterior. Do not insert anything into the electrical connector.
• Clean the bike with a garden hose (low pressure), mild dish soap, and a damp cloth. Avoid spraying electronics, connectors, hub motor ends, rear cassette, or front sprocket.
• Rinse thoroughly with low-pressure water and dry completely, paying extra attention to electrical components. A hairdryer or shop vacuum can help dry hard-to-reach areas.
• Reinstall the battery securely after the bike is dry.

Tire Inflation and Replacement

Check tire sidewalls for proper size. Tires use a rubber inner tube. Replace tires with the same size and design. Properly inflated tires ensure optimal performance, range, and tire life.

Maintain tire pressure between 40-65 psi (2.8-4.5 bar). Never exceed the maximum pressure listed on the sidewall. Check tire pressure before each ride. Low pressure can damage wheels.

Always replace tires with equivalent ones featuring reflective sidewalls for better visibility in low light conditions. Keep tires clean to ensure reflective sidewall function.

Recommended Service Intervals

Regular inspection and maintenance are key. Intervals are guidelines; actual needs vary by use.

Troubleshooting

Bike does not work

• Possible Cause: Low battery, faulty connections, battery not seated, improperly turned on, blown fuse, brakes applied/stuck.
• Most Common Solution: Charge battery, clean/repair connector, reseat battery, review manual, replace fuse, disengage brakes.

Reduced Range / Irregular Acceleration / Motor not responding / Battery not charging / Strange noises

Refer to the following table for common issues and solutions:

Limited Warranty

WARRANTY REGISTRATION CARD

Owner Name: [Fill in]

Address: [Fill in]

City, State, Zip, Country: [Fill in]

Phone: [Fill in]

Model: [Fill in]

Color: [Fill in]

Electric bicycle Serial Number: [Fill in]

Battery Serial Number: [Fill in]

Model: [Fill in]

Color: [Fill in]

Dealer Name: [Fill in]

Address: [Fill in]

City, State, Zip, Country: [Fill in]

Date of Purchase: [Fill in]

Size: [Fill in]

Length of Warranty

This limited warranty covers manufacturing defects within the normal lifespan and use of the product. The serial number serves as proof for after-sales service.

Warranty Periods:

• Bike Frame: 5 year warranty
• All other mechanical components: 1 year warranty
• Electrical components: 2 year warranty

Warranty Conditions

This warranty applies only to the original owner and is non-transferable. The warranty period begins upon receipt and ends at the end of the period or upon sale/transfer of the bicycle.

For warranty claims, the e-bike must be assembled, clean, and accompanied by the original dated sales receipt.

This limited warranty is void if the bicycle is subjected to abuse, neglect, improper repair, improper assembly, lack of maintenance, alteration, modification, installation of incompatible parts, corrosion, accident, or improper use. It is also void if used in a rental or bike-sharing program.

Exclusions

Damage from normal wear and tear, fatigue, or shipping is not covered (though shipping damage claims may be processed if reported within 30 days with dated pictures and original packaging). Paint fading from UV exposure is not covered. Labor charges for warranty service are the owner's responsibility.

YOUNG ELECTRIC may elect to provide a comparable replacement for discontinued parts. All warranty determinations are at the sole discretion of YOUNG ELECTRIC.

The remedies stated are exclusive. Incidental, consequential, or punitive damages are excluded. No other warranties, express or implied (including merchantability or fitness for a particular purpose), extend beyond this warranty.

This warranty grants specific legal rights, which may vary by state or country.