Jasion EB5 Roamer Electric Bike User Manual

Congratulations on Your Purchase!

This user manual provides essential information for assembling and operating your new Jasion EB5 Roamer electric bike. Read all information thoroughly before riding.

NOTE TO ALL RIDERS UNDER 18 YEARS OF AGE: Parental permission is required before riding this electric bike.

Product Safety Notice

Do Not Ride Until You Read This:

Always wear a helmet.
Keep both unique keys properly; lost keys prevent bike activation or battery replacement. Spare keys are not provided by the manufacturer.
Ensure the battery is fully charged before riding.
Always be aware of and follow local road laws.
Do not ride under the influence of drugs or alcohol.
Always respect pedestrians.
Avoid riding in wet conditions as it can cause injury and damage electronics, voiding the warranty.

Warning Message

Avoid water: The electric bike is not waterproof. Water damage to electronics is not covered by warranty. Riding in wet conditions is dangerous.
Avoid prolonged exposure to sun or rain and storage in places with high temperatures or corrosive gas.
Abuse: Physical damage from negligent care or extreme riding is not covered.
Riding the Jasion Electric Bike carries risk of severe injury or death from loss of control, collisions, and falls. Ride with caution and at your own risk.
Do not modify the product from its original design.
Do not exceed posted speed limits and obey all traffic laws.
Avoid touching the charging port directly or letting it contact metal objects.
Keep hands and all body parts away from moving parts.
Before riding, check the electric bike for correct operation.
Before riding, check the braking system and ensure all safety labels are in place and understood.
Before riding, ensure all axle guards, chain guards, or other covers supplied by the manufacturer are in place and in serviceable condition.
Before riding, check tires for good condition, proper inflation, and sufficient tread.
Never exceed the 150 kg maximum load rating.
The electric bike should never be used by children under 18.
Maximum Speed: The electric bike has a maximum speed of 28 mph (45 km/h).
Additional insurance may be required. Contact an insurance company or broker for advice.
To conserve electricity, use assist mode, avoid zero starting, frequent braking, driving against wind, carrying heavy loads (including other people), and riding with insufficient air pressure.

Package Contents

Carefully check package contents. For missing or damaged items, contact Jasion customer service at service@jasionbikes.eu.

Unpack the bike by removing the small box inside first. With assistance, remove the bike from the box. Carefully remove all packaging material. Recycle cardboard and foam. Open the small box and set out all contents.

Contents List:

Manual Flyer x1
Stem Cover x1
Pedals x2
Front Wheel x1
Seat x1
Fender x1
Keys x2
Front Wheel Screw x1
Nylon Cable x3
2x Wrenches
5x Allen Key Wrenches
Charger x1
Kickstand x1
Rear Rack x1
Electric Bike x1

Product Overview

The Jasion EB5 Roamer Electric Bike features various components for operation and control.

Key Components:

LCD Display: Shows speed, power level, pedal assist level, riding information.
Shifter: For changing gears.
Grip: Handlebar grip.
Display Controls: Buttons for operating the LCD display.
Throttle: For acceleration.
Battery: Power source for the electric motor.
Stem: Connects handlebars to the fork.
Saddle: The seat.
Seat Post: Adjustable post for the saddle.
Front Light: Headlight for illumination.
Front Suspension Fork: Absorbs shocks for a smoother ride.
Wheel Chain: Drivetrain component.
Pedals: For pedaling.
Motor: Electric motor for assistance.
Crankset: Connects pedals to the chain.
Tire: Rubber outer part of the wheel.
Disc Brake: Braking system.

Assembly

Step 1 - Front Fork

If uncomfortable with assembly, seek a bike shop for assistance and inspection. If self-assembling, follow instructions, adjust gears and brakes, and set tire pressure.

Locate the quick-release lever. Open it and remove the thumb nut, safety hook, and cone spring (opposite the lever). Keep washer and other safety hook/cone spring on the lever side.
Align the fork with the axle at the center of the wheel. Ensure a spacer is between the fork and wheel on each side. Install safety hook, gasket, and nut.
Tighten the nut onto the fork with a No.15 wrench.
Install the front fork cover.

Note: When properly installed, the front wheel should be fully seated and centered in the dropouts of the front fork. The brake rotor should be between the brake pads in the brake caliper. The front fork nut must be fully and properly secured. Ensure the front wheel is secured before proceeding.

Step 2 - Front Fender & Headlight

Remove the nut, washer, and bolt from the top of the front fork to take off the fender.
Take out the headlights and screws (1xBolt, 1xWasher, 1xNut). Slide the fender through the fork. Reattach the bolt, washers, fender, headlight, and nut (in that order) with an 8mm wrench.
Remove the nut, washer, and bolt at the bottom of the front fork. Slide the fender through the fork. Reattach the lower fender screws.
Plug in the headlight. Locate the two sides of the orange, three-pin headlight connector. Align internal pins and notches and external arrows, then press directly together without twisting to fully seat the connection.

Step 3 - Stem

Loosen screws to remove the front fork sleeve.
Take out the stem and insert it into the front frame.
Tighten screws to fix the stem in place.
After ensuring the stem is aligned with the tire direction, tighten the clamping screws below the stem to fix the direction.
Tighten screws to fix the handlebar in place.
Cover the stem screw with Steam screw plugs for protection.

Step 4 - Kickstand

Take out the kickstand and loosen the two screws on top.
Ensure the kickstand is aligned with the two holes in the frame.
Tighten the screws to fix the kickstand in place.

Step 5 - Rear Rack & Taillight

Loosen the four screws in the seat stay.
Align the rear rack with the seat stay and tighten the screws.
Remove the nuts on the taillight.
Assemble the taillight into the rear rack by screwing the nuts.
Use a wrench to tighten the nuts.
For ride safety, secure the taillight cable to the seatstay with nylon cable ties.

Step 6 - Seat

Proper seat height is crucial for pedaling efficiency, safety, and comfort. Your leg length determines the seat position. When pedaling, hips should remain level, and legs should be almost fully extended at the bottom of the pedal stroke, but not over-extended.

To determine correct seat height, sit on the eBike with one pedal at its lowest point and place the ball of your foot on the pedal. Your leg should be almost fully extended (not locked out) with a slight bend at the knee.

Open the quick-release lever by swinging it open and outward fully.
Move the seat up and down by sliding the seatpost in or out of the seat tube. DO NOT raise the seatpost beyond the minimum insertion marking etched into the seatpost tube.
Adjust the seat so the head of the seat is parallel with the top tube.
Close the quick-release lever using your palm or finger.

Step 7 - Pedals

Locate the right-side ("R") and left-side ("L") pedals, which should have "R" or "L" stickers.
Thread the right pedal onto the right crank gently by hand, turning clockwise. Then tighten the pedal with an an Allen wrench.
Thread the left pedal onto the left crank gently by hand, turning counter-clockwise. Then tighten the pedal with an Allen wrench.
Check chain alignment. Rotate the right pedal and crank backward. Watch the chain to ensure it runs smoothly through the drivetrain (rear cog, chain tensioner, front chain ring).

Note: If the pedal/chain doesn't run smoothly or seems misaligned, contact Jasion Support at service@jasionbikes.eu.

Start-up Procedure

After proper assembly and inspection by a certified mechanic, turn on the bike and select a pedal assist level.

Familiarize yourself with battery power positions. Turn on the battery first and cover the rubber case.
Turn on the bike: With the battery locked in place, locate the LCD display controls (near left handlebar grip). Hold down the 'M' button for approximately 3 seconds until power is delivered to the LCD display and it turns on.
Turn on front or taillight: Long press the 'light' button (3 seconds). Long press again (3 seconds) to return to original brightness.
Select pedal assistance (PAS) level (1-3) using the '+' or '-' buttons on the LCD display. Level 1 is lowest, Level 3 is highest. Level 0 means inactive. Start in PAS level 0 or 1 and adjust.
Begin riding carefully with proper safety gear. On a flat surface, in a low gear (1 or 2), most riders can start pedaling with pedal assist level 0 or 1. Use the throttle to accelerate and maintain speed.
The throttle is used by slowly and carefully rotating it backward toward the rider. Do not use the throttle while dismounted.

Do not use the throttle while dismounted. Avoid accidental application of the throttle. Always power off the bike when moving it while dismounted to prevent accidental throttle application.

Remove the Battery

Insert the key into the lock and turn it to the left (unlocking direction).
When unlocked, the battery will pop down.
Prop up the battery with your left hand and remove it with both hands.

When installing, slowly align the battery tube and place it into the battery tube. Gently press with fingers to lock the battery. Ensure it's securely attached to the bike mount.

Charge Your E-Bike

Fully charge the battery before using the electric bike.

Ensure the battery is off by rotating the key to align with the off icon.
Remove the rubber cover on the charging port (opposite side of battery from key switch).
Plug the charger into the battery's charging port. Place the charger on a flat, secure surface. Connect the DC output plug from the charger to the charging port on the side of the battery (whether on or off the bike).
Plug the charger into a power outlet. Charging is indicated by a red LED charge status light on the charger. Once fully charged, the light turns green. Unplug the charger from the wall outlet first, then remove the charger output plug from the battery charging port.

Display and Setting

The LCD display provides various riding information and settings.

Display Elements:

Display Backlight: Indicates if backlight is on.
Error: Displayed when a fault is detected.
Speed: Shows average speed (AVG SPEED), maximum speed (MAX SPEED), real-time speed (RT SPEED).
Speed Unit: Km/h and MPH.
Power Level: Icon indicates battery life.
Pedal Assist Level: 0-3, displays current power assisted mode.
Riding Information: TRIP (single trip), ODO (odometer data), TIME (riding time), POW (power).

LCD Display Controls

Operation	Directions
Turn on bike	Press and hold 'M' button (2)
Turn off bike	Long Press 'M' button (2)
Increase pedal assist (PAS) level	Press '+' button (1)
Decrease pedal assist (PAS) level	Press '-' button (3)
Toggle odometer, trip odometer	Press once 'M' button (2)
Turn on walking mode	While dismounted, press and continue to hold '-' button (3)
Turn on headlight	Press once 'light' button (5)
Activate Electric Bell	Press once 'bell' button (6)

LCD Display Operations - Setting Mode:

When the bike is on, press and hold '+' and '-' buttons simultaneously to enter setting mode.

In the setting interface, short press '+' or '-' to add or subtract the setting value. The parameter will blink after modification. After selecting the set value:

Long press 'M' to save the current value.
Short press 'M' to switch to the next parameter and save the set value of the previous parameter at the same time.

LCD Display Settings:

Number	Set up the item	Specific	The screen appears (Description)
P01	Backlight brightness Setting	1 level darkest, 3 levels brightest	Display shows 'P01' and brightness level (e.g., 0002)
P02	Mileage unit Setting	0 for KM; 1 for MILE	Display shows 'P02' and unit (e.g., 0001 Mile)
P03	Voltage level Setting	Default voltage setting is 48V.	Display shows 'P03' and voltage (e.g., 0048)
P04	Sleeping time Setting	0 for no sleep, other numbers are sleep time. Range: 1-60 (minutes)	Display shows 'P04' and sleep time (e.g., 0011)
P05	Pedal assist Setting	The default mode is 0-3	Display shows 'P05' and assist level (e.g., 0001)
P06	Wheel diameter Setting	Do not change	Display shows 'P06' and diameter (e.g., 02 7.5)
P08	Speed limit Setting	Default setting is 63 km/h	Display shows 'P08' and speed limit (e.g., 0063)
P16	Restore factory Setting	Tune to menu P16, long press down key 5s	Display shows 'P16' and status (e.g., 0000 Mile)

Note: Do not change setting values of P09-P20. Contact Jasion at service@jasionbikes.eu for questions.

Daily Care and Maintenance

Cleaning and Storage

Wipe stains off the bike body with a damp cloth. For stubborn stains, use toothpaste and a toothbrush, then wipe clean with a damp cloth.

Notes: Do not clean with alcohol, gasoline, kerosene, or corrosive chemicals. Do not wash with high-pressure water spray. During cleaning, ensure the bike is off, charging cable unplugged, and rubber flap closed to prevent water leakage, electric shock, or other problems. When not in use, keep the bike indoors in a dry, cool place. Avoid prolonged outdoor exposure to sunlight, overheating, or overcooling, which accelerates battery pack lifespan.

Battery Maintenance

Use original battery packs only; other models/brands may cause safety issues.
Do not touch contacts, dismantle, or puncture casing. Keep contacts away from metal objects to prevent short circuits, battery damage, or injuries.
Use original power adapter to avoid damage or fire.
Mishandling of used batteries can harm the environment. Follow local regulations for proper disposal.
Fully charge the battery after every use to prolong its lifespan.

Storage and Disposal

Store the bike in a cool, dry place between 10°C-25°C (50-77°F). Extreme humid environments can cause condensation/water accumulation, damaging the battery. Devices are not intended for use above 2000m elevation. Prolonged exposure to UV rays, rain, and elements can damage enclosure materials. Store indoors when not in use.
Avoid recharging the bike after completely exhausting the battery. Charge it as soon as possible when low.
Charge the bike every other month to preserve the battery.

Recommended Service Intervals

Regular inspection and maintenance are key for optimal function and reduced wear. Service intervals are guidelines; actual wear varies with use. Inspections, service, and replacements should be performed at the time or mileage interval that comes first.

Interval	Inspect	Service	Replace
Weekly, 100-200 mi (160-321km)	Check drivetrain for proper alignment and function (chain, freewheel, chainring, derailleur). Check wheel trueness and quiet operation (no spoke noise). Check frame for damage.	Clean frame with damp cloth. Use barrel adjuster(s) to tension derailleur/brake cables if needed.	Replace any damaged components confirmed by Heybike Product Support or a certified mechanic.
Monthly, 250-750 mi (402-1207km)	Check brake pad alignment, brake cable tension. Check bike shifting, derailleur cable tension. Check chain stretch. Check brake and shifter cables for corrosion/fraying. Check spoke tension. Check accessory mounting (rack mounting bolts, fender hardware, alignment).	Clean and lubricate drivetrain. Check crankset and pedal torque. Clean brake and shift cables. True and tension wheels if loose spokes found. Balance the battery.	Replace brake and shift cables if necessary. Replace brake pads if necessary.
Every 6 Months, 750-1250 mi (1207-2011km)	Inspect drivetrain (chain, chainring, freewheel, derailleur). Inspect all cables and housings.	Standard tune-up by certified mechanic recommended. Grease bottom bracket.	Replace brake pads. Replace tires if necessary. Replace cables and housings if necessary.

Pre-Ride Safety Checklist:

Notice: Before every ride, and after every 35-50 miles (56km-80km), follow this checklist.

Safety Check Item	Details to Verify
1. Brakes	Ensure front and rear brakes work properly. Check brake pads for wear; ensure they are not overworn. Ensure brake pads are correctly positioned in relation to rims. Ensure brake cables are lubricated, correctly adjusted, and show no obvious wear. Ensure brake levers are lubricated and tightly secured to the handlebar. Test that brake levers are firm and that brake and brake light function properly.
2. Wheels and Tires	Ensure tires are inflated within recommended limits posted on sidewalls and hold air. Ensure tires have good tread, no bulges or excessive wear, and are free from other damage. Ensure rims run true and have no obvious wobbles, dents, or kinks. Ensure all wheel spokes are tight and not broken. Check axle nuts and front wheel quick-release for tightness. Ensure locking lever on quick-release skewer is correctly tensioned, fully closed, and secured.
3. Steering	Ensure handlebar and stem are correctly adjusted, tightened, and allow proper steering. Perform a handlebar twist test (see assembly step 3) to ensure stem clamp bolt security. Ensure handlebar is set correctly in relation to the fork and direction of travel.
4. Chain	Ensure the chain is clean, oiled, and runs smoothly. Extra care is required in wet, salty/corrosive, or dusty conditions.
5. Bearings	Ensure all bearings are lubricated, run freely, and display no excess movement, grinding, or rattling. Check headset, wheel bearings, pedal bearings, and bottom bracket bearings.
6. Cranks and Pedals	Ensure pedals are securely tightened to cranks. Ensure cranks are securely tightened and are not bent.
7. Derailleur and Mechanical Cables	Check that the derailleur is adjusted and functioning properly. Ensure shifter and brake levers are attached to the handlebar securely. Ensure all shifter and brake cables are properly lubricated.
8. Frame, Fork, and Seat	Check that the frame and fork are not bent or broken. Replace if bent. Check that the seat is adjusted properly, and seatpost quick-release lever is securely tightened.
9. Motor Drive Assembly and Throttle	Ensure hub motor is spinning smoothly and motor bearings are in good working order. Ensure all power cables running to hub motor are secured and undamaged. Ensure hub motor axle bolts are secured and the torque arm, torque arm bolt, and torque washers are in place.
10. Battery	Ensure battery is charged before use. Ensure there is no damage to battery. Lock battery to frame and ensure it is secured. Charge and store bike and battery in a dry location, between 10℃-25℃ (50-77°F). Let bike dry completely before using again.
11. Electrical Cables	Check connectors for full seating and freedom from debris/moisture. Check cables and cable housing for obvious signs of damage. Ensure headlight, taillight, and brake light function, are adjusted properly, and unobstructed.
12. Accessories	Ensure all reflectors are properly fitted and not obscured. Ensure all other fittings on bike are properly secured and functioning. Inspect helmet and other safety gear for damage. Ensure rider is wearing a helmet and other required riding safety gear. Ensure mounting hardware is properly secured if fitted with a front rack, rear rack, basket, etc. Ensure taillight and taillight power wire are properly secured if fitted with rear rack. Ensure fender mounting hardware is properly secured if fitted with fenders. Ensure no cracks or holes in fenders. If installed, ensure optional rear wheel lock is secured in unlocked position and key is removed before every ride.

Your cables, spokes, and chain will stretch after an initial break-in period of 50-100 mi (80-160 km), and bolted connections can loosen. Have a certified, reputable bike mechanic perform a tune-up after this period (depending on riding conditions). Regular inspections and tune-ups are important for safety and enjoyment.

Tire Inflation and Replacement

The EB5 Roamer uses 26"x1.95" rubber tires with inner tubes. Check tires before each use for proper inflation and condition to maintain operational characteristics and avoid unsafe conditions.

Jasion recommends 45-60 PSI for stock tires. Always stay within the manufacturer's recommended air pressure range listed on the tire sidewall.

It is critically important to maintain proper air pressure. Underinflation can cause loss of control; overinflation can cause tires to burst. Failure to maintain indicated pressure may result in tire/wheel failure.

Inflate tires from a regulated air source with an available pressure gauge. Unregulated sources can overinflate, causing a burst tire.

Even tires with flat-preventative liners can get flats. Replace worn or flat tires/tubes before operating the bike to prevent injury or damage.

When changing a tire or tube, ensure all air pressure is removed from the inner tube before removing the tire from the rim. Failure to do so can result in serious injury.

Using aftermarket tires or inner tubes not provided by Jasion may void your warranty, create unsafe riding conditions, or damage your bike. If required by law, ensure replacement aftermarket tires have sufficient reflective sidewall striping.

For more information on tire/tube replacement or inflation, visit jasionbikes.eu/pages/help-center or contact Jasion Product Support.

Email: service@jasionbikes.eu

Phone: +49 (211) 8694-2198

Troubleshooting

Symptom	Possible Causes	Most Common Solutions
The bike does not work	Insufficient battery power Faulty connections Battery not fully seated in tray Improper turn on sequence Brakes are applied Blown discharge fuse	Charge the battery Clean and repair connectors Install battery correctly Turn on bike with proper sequence Disengage brakes Replace discharge fuse
Irregular acceleration and/or reduced top speed	Insufficient battery power Loose or damaged throttle Misaligned or damaged magnet ring	Charge or replace battery Replace throttle Align or replace magnet ring
The motor does not respond when the bike is powered on	Loose wiring Loose or damaged throttle Loose or damaged motor plug wire Damaged motor	Repair and/or reconnect Tighten or replace Secure or replace Repair or replace
Reduced range	Low tire pressure Low or faulty battery Driving with too many hills, headwind, braking, and/or excessive load Battery discharged for long period of time without regular charges, aged, damaged, or unbalanced Brakes rubbing	Adjust tire pressure Check connections or charge battery Assist with pedals or adjust route Balance the battery; contact tech support if range decline persists Adjust the brakes
The battery will not charge	Charger not well connected Charger damaged Battery damaged Wiring damaged Blown charge fuse	Adjust the connections Replace Replace Repair or replace Replace charge fuse
Wheel or motor makes strange noises	Loose or damaged wheel spokes or rim Loose or damaged motor wiring	Tighten, repair, or replace Reconnect or replace motor.

Specifications

ITEM	SPECIFICATIONS
Model	EB5 Roamer
Product Dimensions	17206201200(mm)
Package Dimensions	1350220700(mm)
Max Load	150kg
Package Weight	78 Lbs (35kg)
E-Bike Weight	65 Lbs (29.5kg)
Max Speed	25km/h
Range	62 Miles (100km)
Battery	48V 11Ah
Charger	48V
Max Angle of Climb	14 Degrees
Charging Time	4-5 Hours
Tire Pressure	45-60 PSI
Bell/Horn	Electric Horn Installed
Motor	250W
Frame Material	Aluminum
IP Level	IPX 6

FAQs

Q1: What if the e-bike arrived missing an accessory or a broken part?: A1: Take a photo and send to Jasion Support Team via email: service@jasionbikes.eu. Jasion Support Team will reply and send correct accessory or part replacement.
Q2: Will my bike arrive assembled?: A2: Your bike will arrive mostly assembled. Tools and a comprehensive assembly video will be provided for the remaining assembly.
Q3: What can I do if something goes wrong with my e-bike during the warranty?: A3: Communication is the best way to solve problems. Contact Jasion in time. Describe the problem in detail and provide photos/videos with your order ID for quick resolution.

Error Code

Code	Condition
0	Normal condition
33	Current issue
34	Throttle issue
35	Motor phase issue
36	Motor Hall issue
37	Brake issue
30	Communication issue

Limited Warranty

14 Days Satisfaction Guaranteed Return Policy

Jasion's return policy allows product returns purchased on the authorization Channel within 14 days from receipt of shipment for a refund. Express shipping cost is non-refundable.

To be eligible for a return, the item must be in the same condition as received: unworn, unused, less than ten (10) miles on the odometer, free of wear/tear, dirt, dust, fragrance, or other signs of use. All original box contents (charger, keys, hardware, etc.) must be included.

Returns after 14 days are not acceptable; exchanges for new products or partial refunds may be accepted.

Jasion will deduct shipping fees or a $180/pc restocking fee for refunds of non-defective products or non-longer needed products.

Jasion is not responsible for lost packages or unverified products received for return requests.

Products with damage caused by the end-user may be subject to denial of the return request.

Limited Product Warranty

Jasion warrants the original purchaser that their Jasion product will be free from defects in materials and workmanship under normal use for a specified period. Jasion does not warrant uninterrupted or error-free product operation.

Only the original owner of an ebike purchased from Jasion online or physical storefront is covered. The Warranty Period begins upon receipt of the ebike and ends upon the earlier of the end of the Warranty Period or any sale/transfer of the ebike to another person. The Limited Warranty does not apply to subsequent owners.
The Limited Warranty is expressly limited to replacement of defective lithium ion battery ("Battery"), frame, forks, stem, handlebar, headset, seat post, saddle, brakes, lights, bottom bracket, crank set, pedals, rims, wheel hub, freewheel, cassette, derailleur, shifter, motor, throttle, controller, wiring harness, LCD display, kickstand, reflectors, and hardware (each a "Covered Component").
Covered Components are warranted to be free of defects in materials and/or workmanship during the Warranty Period.

Limited Warranty Does Not Cover:

Normal wear and tear of any Covered Component.
Consumables or normal wear and tear parts (including tires, tubes, brake pads, cables and housing, grips, chain, spokes).
Damage or defects to Covered Components resulting from failure to follow instructions in the ebike owner's manual, acts of God, accident, misuse, neglect, abuse, commercial use, alterations, modification, improper assembly, installation of parts/accessories not originally intended or compatible with the ebike as sold, operator error, water damage, extreme riding, stunt riding, or improper follow-up maintenance.
Jasion is not liable for damage, failure, or loss caused by unauthorized service or use of unauthorized parts.
Battery damage from power surges, improper charger use, improper maintenance, normal wear, or water damage.
Any products sold by Jasion that are not an ebike.

Contact Us

Contact Jasion for issues related to riding, maintenance, safety, or errors/faults.

Tel: +49 (211) 8694-2198

Support Email: service@jasionbikes.eu

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JASION LTD

Web: www.jasionbikes.eu
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