Maintenance & Care

Servicing, care and long-term maintenance for CEMOTO products.

Maintenance

Servicing, care and long-term ownership guidance for CEMOTO electric bikes and electric dirt bikes.

In this section

Page Contents
Maintenance Schedule What to check and when — daily, weekly, monthly and annual
Battery Care & Charging Charging practice, storage, temperature limits, transport and disposal
Torque & Fastener Reference Torque values and the fasteners that matter
Tires, Wheels & Suspension Tire pressure, wheel inspection, suspension setup
Cleaning & Storage How to wash the bike safely and prepare it for storage
Maintenance Log A template for recording service history

The core maintenance principles

CEMOTO's owner manual sets out a small number of maintenance rules that cover most of what matters:

1. Battery and charger Use only the included battery and the included battery charger. If either is discontinued or out of service, replace it immediately with the recommended part supplied for your model. Using a non-certified charger voids the battery warranty and creates a fire risk.

2. Wheels and drive system Wheels and drive system components wear normally with use. It is the rider's responsibility to systematically check the wheels for excessive wear and to properly adjust and replace drive system components as needed.

3. Spare parts Most common spare parts are available through CEMOTO distributors and the accessories range.

4. Electrical components are not user-serviceable The electrical elements can only be cleaned on the outside. There is no need to maintain the inside, and you should not open them yourself. Opening sealed electrical components voids the warranty on those parts.

5. Do not overload Overloading damages the electrical components — plastic parts can deform from high temperature, or the fuse socket can be damaged by heat. Overload damage is not covered by warranty.

6. Cut the power when not in use For safety, cut the power supply when the bike is not being used. Turn the power switch off when the motorcycle is not in use.

7. Clean only the exterior Never pressure-wash bearings, seals, connectors or the motor. See Cleaning & Storage.

Fastener check reminder

Fasteners settle after assembly and during the first rides. After your first 20–30 minutes of riding, re-check:

Use the values in Torque & Fastener Reference.

The chain tension rule

Chain slack should be approximately 15 mm. Check it frequently — chain tension affects drivetrain noise, wear rate and the risk of derailment. Adjustment procedure: loosen the rear axle nuts, adjust the tension screw, then retighten the axle nuts.

See Drive & Transmission.

Tire pressure rule

Check air pressure frequently. If the pressure is too low, rolling resistance increases and the riding range is reduced. Under-inflation also risks damaging the rim and pinching the inner tube.

Use a hand pump with an integrated pressure gauge and a Schrader-type valve. Do not use a pressurized gas-station air system — those are designed for car tires at much higher pressure and volume.

Serviceability by design

CEMOTO selects serviceable components deliberately: the range is built around standard, replaceable parts rather than proprietary assemblies, and compatible D-series parts and accessories are available through the CEMOTO accessories range. This means:

Local bike shops can generally service most components, since most are standard. For warranty-related repairs, contact CEMOTO first to ensure coverage is preserved.

Battery Care & Charging

Battery practice for CEMOTO lithium-ion packs — charging, storage, temperature limits, transport and disposal.

Safety first. Lithium-ion batteries can be dangerous if mistreated. Never open, puncture, crush or short a battery. Never charge a damaged or swollen pack. Never charge with a damp socket. Charge away from children, pets and flammable materials.

Charging

Procedure

  1. Insert the charger plug into the battery charging socket.
  2. Insert the charger power plug into the power supply.
  3. Charge fully: approximately 6 hours for 48V models, 7–8 hours for 72V models.
  4. Disconnect from the mains first, then from the battery.

First charge

The owner manual recommends an initial charge of up to 12 hours for the first charge cycle, with a maximum charge time thereafter of 8–9 hours.

Charging rules

Rule Reason
Use only the supplied compatible charger Non-certified chargers are the leading cause of battery damage and void the battery warranty
Do not charge when the socket is damp Water ingress in the charging circuit creates a short and fire risk
Use the correct power source for your market D-series U.S. chargers use a two-prong plug
Keep away from children, pets and flammable materials Fire safety
Charge in a dry, ventilated location Heat and hydrogen venting must be able to dissipate
Do not leave a charging battery unattended for long periods Fire safety
Do not charge a swollen, damaged or wet battery Fire safety

Charging temperature

Charge at a normal ambient temperature. Extreme cold or heat permanently damages the battery. Many BMS units refuse to charge below freezing or above a high temperature threshold — if charging will not start, allow the pack to reach room temperature and retry.

Temperature and capacity

Usable battery capacity falls significantly in cold weather. CEMOTO's owner manual gives these reference figures:

Battery temperature Approximate available capacity
14 °F ~70 %
32 °F ~80 %
70 °F ~90–95 %

This is normal lithium-ion behavior, not a fault. Expect a shorter range in winter on the same charge.

Storage and operating temperature

Never store the product frozen or at extremely high temperatures. The recommended storage temperature range quoted in the owner manual is approximately 68 °F (20 °C) down to 45 °F (7 °C). Extreme temperatures will permanently damage the battery.

In practice, for storage:

Storage

Situation Recommended action
Short-term (days) Leave the battery on the bike, powered off, at around 40–70 % charge
Long-term (weeks to months) Charge to approximately 50 %, remove the battery if removable, and store in a dry location within the recommended temperature range. Disconnect the battery from the bike so it does not slowly discharge
Storage off the bike Store in a dry place, out of reach of children, away from flammable materials
Before riding again Fully charge before use

Do not store a deeply discharged battery for an extended period — this causes irreversible capacity loss and may latch the BMS protection.

Do not leave the battery connected to the charger indefinitely.

Battery life

Detail
Average lifespan 1 to 2 years, depending on conditions and usage
Decline pattern Gradual capacity loss over the battery's life, accelerating with heavy use and temperature extremes
Replacement trigger Available capacity below 70 %, as measured by the discharge meter
Warranty term 12 months (D-series)

Practices that extend battery life

Transport

Battery transport is regulated because lithium-ion cells are classified as dangerous goods.

Mode Notes
Car / truck Transport upright and secure so the pack cannot be punctured or shorted. Do not leave in a hot vehicle. Bring to room temperature before charging at your destination
Courier / parcel Regulated. eBike batteries cannot be shipped to parcel stores or lockers — they must go to a physical address where someone can receive them. They may also be shipped separately from the bike body
Air Heavily restricted. Check with the carrier before traveling, and never carry a damaged pack aboard an aircraft
Never Never transport a swollen, punctured, wet or otherwise damaged pack in an enclosed passenger space

Disposal and recycling

This product contains sealed lithium-ion batteries and must be handled properly.

Many regions require lithium-ion batteries to be returned to a designated collection point. Many retailers also accept them.

Safety warnings

Reproduced from the CEMOTO owner manual:

WARNING: Do not dispose of the battery pack in fire. The battery pack could explode.

Do not mix old and new batteries. Do not mix alkaline batteries, standard (carbon zinc) batteries, or rechargeable (nickel cadmium) batteries.

The product contains lithium-ion batteries, which must be disposed of according to locally applicable battery regulations.

Additional safety guidance:

Battery warranty exclusions

Battery warranty does not cover failures caused by:

Covered: where the discharge meter detects less than 70 % of available capacity, or where the voltage is abnormal and the battery cannot be charged — subject to the exclusions above.

Note that an eligible battery defect will be repaired or replaced without extending the original warranty period, and battery replacement does not qualify for cash reimbursement.

See Warranty.

Maintenance Schedule

What to check, and when.

Before every ride

Check Detail
Brakes Lever feel firm; brake cuts motor power; pads not worn; no drag
Throttle Snaps back to zero immediately; housing intact
Tires Pressure correct; no cuts or embedded debris
Wheels Spin freely; no lateral play or scraping
Battery Sufficient charge for the planned ride; fully seated and latched
Frame and fork No cracks, breaks, worn or loose parts
Fasteners Axles, stem bolts and footpegs secure
Chain Slack approximately 15 mm
Display Illuminates; correct power reading; no error indicator
Lights and horn Operational

Full checklist: Pre-Ride Inspection.

After every ride (off-road use)

Task Why
Clean mud and grit from the chain, sprockets and tensioner Grit is the primary cause of drivetrain wear
Inspect the brakes for grit, glazing and pad wear Off-road braking accelerates pad wear
Wipe down the frame and suspension Prevents corrosion and lets you spot cracks
Check the tires for damage and embedded debris Off-road riding increases puncture risk
Allow the motor and brakes to cool before touching them These components get very hot and can burn skin
If ridden in wet or dusty conditions: lubricate the chain Prevents stiff links and rust

Weekly (or every few rides)

Task
Check and correct tire pressure
Check chain tension and adjust if necessary
Inspect brake pad thickness; adjust cable tension if applicable
Inspect the chain, sprocket and tensioner pulley for wear
Check the spoke tension and wheel trueness
Check the suspension for oil weeping and damaged seals
Re-check all fasteners, especially after any off-road ride on rough terrain
Clean the controller housing fins of mud so they can dissipate heat

Monthly

Task
Battery health check. Confirm the battery accepts and holds a full charge; note any decline in range
Inspect all electrical connectors for corrosion, water ingress and burned pins
Inspect the wiring harness for chafing where it passes the steering head, swing arm pivot and frame edges
Check the brake fluid level (hydraulic brakes) and look for leaks at the caliper, hose and master cylinder
Inspect the tires for sidewall cracking and tread wear; replace if worn
Check the suspension mounting bolts and shock pivots
Clean and inspect the chain; measure for elongation
Verify all lights, the brake light and the horn
Test the brake power cut-off function

Every 6 months

Task
Consider a professional service — bearings, suspension and hydraulic brakes benefit from specialist attention
Bleed hydraulic brakes if lever feel has softened
Inspect wheel bearings and replace if rough or noisy
Inspect the suspension for oil loss and consider a fork/shock service
Full inspection of the frame for cracks, particularly around the head tube and shock mounts
Review the maintenance log and schedule any outstanding work

Annually

Task
Full professional service, including bearings and suspension
Replace hydraulic brake fluid
Replace the chain and sprocket as a set if worn
Assess the battery's remaining capacity against a new pack
Check the frame, fork and swing arm for fatigue cracks
Replace worn cables and housings

Battery lifespan note: rechargeable batteries average 1 to 2 years of service, depending on conditions and usage. Plan for replacement. See Battery Care & Charging.

After specific events

Event Actions
Wet weather riding Dry the bike; lubricate the chain; inspect connectors for water ingress; check brake performance
Sand or salt exposure Rinse thoroughly with low pressure; lubricate the chain; check for corrosion, especially on fasteners and the frame
Deep mud Clean the drivetrain, wheels, brake calipers and controller fins
Storage See Cleaning & Storage — set the battery to a partial charge and disconnect it
Professional repair or wheel removal Re-verify axle torque, brake alignment and chain tension
Shipping or transport Inspect for damage before the next ride

Owner manual maintenance requirements

Reproduced from the CEMOTO owner manual:

  1. Battery — Use only the included battery. If it has been discontinued, replace it immediately with the recommended battery supplied with the electric motorcycle.
  2. Battery charger — Use only the included battery charger. If it is out of service, replace it immediately with the recommended charger supplied with the motorcycle.
  3. Wheels — Wheels and drive system components age or wear normally. It is the user's responsibility to systematically check the wheels for excessive wear and to properly adjust and replace drive system components if necessary.
  4. Spare parts — Most common spare parts are available through our distributors.

Additional requirements from the manual:

Tires, Wheels & Suspension

Tire pressure, wheel inspection and suspension setup for CEMOTO bikes.

Tire pressure

Check air pressure frequently. The owner manual is explicit: if the air pressure is too low, resistance increases and the riding range is reduced.

Why pressure matters

Pressure Effect
Too low Increased rolling resistance (shorter range); risk of rim damage and pinch flats; vague, unstable steering; increased tire heat
Correct Best balance of grip, comfort and efficiency
Too high Reduced grip, especially on loose off-road surfaces; harsh ride; increased puncture risk from sharp edges

Inflating correctly

Off-road pressure tuning

The D-series runs knobby off-road tires. Lower pressures improve traction on soft terrain but increase pinch-flat risk:

Surface Tendency
Soft sand, mud, loose gravel Lower pressure for a larger contact patch and better float
Hard-packed trail, rock Higher pressure to protect the rim and improve steering precision
Tarmac or sealed surface Higher pressure for efficiency and lower rolling resistance

Caution: pressures below the tire manufacturer's minimum risk rim damage and pinch flats on a heavy electric dirt bike. Do not go below the sidewall minimum.

Tire wear and replacement

Wear indicator Action
Knobs rounded or flattened Grip has dropped significantly — replace
Center tread worn away Replace
Sidewall cracking Replace — a safety risk
Cuts or exposed cords Replace immediately
Repeated punctures Inspect for embedded debris; replace if the casing is compromised

Tires and inner tubes are wear components excluded from warranty, but are available as replacement parts — see Spare Parts & Compatibility.

Tire options

CEMOTO supplies street tires for the D-series as an accessory, alongside the standard knobby off-road fitment:

Tread type Best for
Knobby (standard) Dirt, mud, loose and soft terrain
Street tire Hard-packed surfaces; lower noise and rolling resistance; longer tread life
Mixed-surface A compromise where a rider needs both

Confirm the correct size for your model before ordering. D-series sizes: 14"/12" (D02 Classic, D03 Pro) and 17"/14" (D02 Track, D03 Beast).

Wheel inspection

Check What to look for
Trueness Lift the wheel and spin it. Side-to-side wobble indicates a buckled rim or uneven spokes
Spoke tension Squeeze adjacent spokes — they should feel similar. A loose spoke produces a dull tone
Rim condition Dents, cracks, flat spots
Bearings With the wheel off the ground, feel for roughness, grinding or lateral play
Axles Secure, correct torque, wheel spins freely
Hub No cracks around spoke holes

Wheels and drive systems wear normally. It is the rider's responsibility to systematically check the wheels for excessive wear and to adjust or replace drive system components as needed.

Suspension

CEMOTO D-series bikes have full front and rear suspension — front fork and rear shock. The 72V performance models use pro off-road suspension front and rear. Suspension is what keeps the tires on the ground, which matters more for usable traction than peak power.

Front fork

Check Detail
Travel Compress the fork and confirm it moves smoothly through its range
Oil leakage A ring of oil on the fork tube indicates a failed seal — service required
Pitting or scratches Damaged stanchions tear seals; they must be replaced
Fork length (D02 Track) 29.53 in (75 cm)

Rear shock

Check Detail
Mounting bolts Secure and correctly torqued
Oil leakage A failed shock loses damping and can bottom out
Bushing play Lift the rear of the bike and check for lateral play
Spring preload Adjust to rider weight so the shock sits in the correct part of its travel

Setting sag for your weight

Sag is how far the suspension compresses under the rider's static weight. It should sit in a moderate part of the total travel — enough that the suspension can extend over dips as well as compress over bumps.

To measure:

  1. Lift the rear of the bike until the suspension is fully extended. Measure from the axle to a fixed point on the frame.
  2. Sit on the bike in riding position with both feet on the pegs. Have a helper measure again.
  3. The difference is the sag. Adjust spring preload to bring the sag into the recommended range for your weight.

If the sag cannot be set correctly within the preload range, a spring rate change is needed — this is a specialist job.

Suspension maintenance

Interval Action
Before every ride Visual check for leaks and damage; check that the travel is smooth
After off-road rides Clean mud from the fork wipers and shock; wipe the stanchions
Monthly Check mounting bolts; check for oil weeping
Every 6 months Consider a fork and shock service — oil and seals degrade with use
Annually Full suspension service

Do not use a pressure washer on fork seals, shock seals or bearings. High-pressure water drives grit and moisture past the seals.

Torque & Fastener Reference

Correct torque prevents two opposite failures: fasteners working loose, and components being crushed or cracked by overtightening.

Always use a calibrated torque wrench for safety-critical fasteners — axles, stem bolts, brake calipers and suspension mounts.

Published torque values

Fastener Torque Source
Rear rack fixing screw 16 N·m CEMOTO owner manual
Rear axle nuts Firm — wheel must be secure with correct chain tension Owner manual procedure
Handlebar stem bolts (M8, D-series) Tighten with 8 mm hex; firm, in a cross pattern Assembly procedure
Handlebar clamp bolts (M6, D-series) Tighten with 6 mm hex; do not crush the clamp block Assembly procedure
Front axle nut (D-series) Firm; wheel must spin freely with no lateral play Assembly procedure
Brake caliper mounting bolts Firm; recheck after the first ride Assembly procedure
Front fender screws (M5, D-series) Firm with 5 mm hex; fender must not move under pressure Assembly procedure
Front number plate bolt (M5, D-series) Firm with 5 mm hex Assembly procedure
Throttle / brake lever clamp (M4, D-series) Firm with 4 mm hex; throttle must snap back freely Assembly procedure
Pedals (eBikes) Firm — hand-start, then wrench finish Assembly procedure
Seat post clamp Tight enough that the saddle cannot be rotated by hand Assembly procedure

Note: CEMOTO does not publish a complete torque table for every fastener. Where a value is not published, tighten to the general guidance below and never exceed the marking on the fastener or component.

General tightening guidance

Fastener size Typical application Guidance
M4 Lever clamps, small brackets, plastics Light — these thread into aluminum or plastics and strip easily. Firm by hand plus a short wrench
M5 Fender screws, number plate, panels Firm, not forceful
M6 Handlebar clamps, brake calipers, disc bolts Firm with a standard-length wrench. A cross pattern where there are multiple bolts
M8 Stem bolts, larger brackets Firm with a longer wrench; use a cross pattern
Axle nuts Wheel axles Firm. The wheel must spin freely with no lateral play, and must not shift under braking or drive load
Suspension mounts Shock and fork mounts Follow the component guidance; these carry high loads

Tightening technique

  1. Clean the threads and remove any grit. Debris in a thread causes false torque readings.
  2. Apply the correct lubricant or threadlocker if specified. Never apply threadlocker to a nylon-insert self-locking nut.
  3. Start fasteners by hand to avoid cross-threading.
  4. Bring multiple bolts up gradually in a cross (diagonal) pattern. Fully tightening one bolt first distorts the component.
  5. Use a torque wrench for the final pass on safety-critical fasteners.
  6. Never reuse a self-locking nut whose locking feature has worn, or a bolt that has stretched.

Safety-critical fasteners

These fasteners should be checked after assembly, after the first ride, and at every service:

Fastener Consequence of failure
Front axle Wheel detachment — loss of control
Rear axle Wheel shift, chain tension loss, possible rear wheel lock
Handlebar stem and clamp bolts Bars rotate or detach — loss of control
Brake caliper mounting bolts Brake loss
Brake lever clamp Inability to brake
Suspension mounting bolts Structural failure
Pedal spindles Pedal detachment and crank damage
Motor mounting bolts Motor movement, chain misalignment, phase wire damage

Re-check after the first ride

Components seat and settle during the first 20–30 minutes of riding. Re-check every fastener above after your first ride — this is the single highest-value maintenance action on a new bike.

Threadlocker and lubricant guidance

Application Recommendation
Brake caliper bolts, stem bolts, suspension mounts Medium-strength threadlocker is commonly used. Apply to clean, degreased threads
Axle nuts with nylon insert No threadlocker. Replace the nut when the insert loses grip
Pedal threads Light grease. Never threadlocker — pedals must be removable
Seat post Light grease on the post, not on the clamp bolt
General bolts into aluminum Anti-seize if the bike is ridden in wet or salty conditions

Inspecting for loose fasteners

A fastener check takes a few minutes and catches most emerging problems. Look for:

Fastener maintenance intervals

Interval Action
After assembly Torque all safety-critical fasteners
After first ride (20–30 min) Re-check all safety-critical fasteners
Before every ride Visual check of axles, stem and pedals
Weekly / after rough off-road use Full fastener walk-around
Monthly Check suspension mounts and motor mounts
Every 6 months Full fastener inspection with a torque wrench

Cleaning & Storage

How to wash a CEMOTO electric bike or dirt bike without damaging it, and how to prepare it for storage.

Cleaning

The golden rule

Clean the exterior only. The owner manual is specific: the electric elements can only be cleaned on the outside. There is no need to maintain the inside, and do not open them yourself. Opening sealed electrical components voids the warranty on those parts.

What to protect

Component Why How
Motor Water ingress damages windings and bearings Never direct a jet at the motor or its cable exit
Controller Sealed electronics; the fins need airflow Never direct a jet at the controller or its connectors
Battery and charging port Water in the charging circuit is a fire risk Cover the charging socket; never wash with the battery port open
Display and connectors Water in connectors causes corrosion and intermittent faults Avoid directing water at the cockpit and connector blocks
Bearings (wheel, headset, bottom bracket) High pressure drives water past seals Never use a pressure washer
Fork and shock seals High pressure drives grit into the seals Never use a pressure washer
Brake discs and pads Contamination reduces braking and causes noise Avoid soaps and oils on braking surfaces
  1. Let the bike cool. Do not wash a hot motor or hot brakes.
  2. Remove the battery if your model allows, and cover the battery compartment and charging socket. If the battery is not removable, keep water away from the charging port.
  3. Rinse with low pressure, using a garden hose without a high-pressure nozzle. Work from the top down.
  4. Wash with a mild detergent and a soft brush or sponge. Use a separate brush for the drivetrain, which is greasy.
  5. Clean the drivetrain with a dedicated degreaser and a stiff brush. Rinse thoroughly, then re-lubricate the chain while it is still slightly damp so the lubricant penetrates the rollers.
  6. Clean the controller fins of mud so they can dissipate heat. Use a soft brush.
  7. Dry with a soft cloth and allow the bike to air-dry fully before riding.
  8. Wipe the fork stanchions and shock shaft clean to protect the seals.
  9. Check the brakes after washing. A short, gentle braking session warms and dries the discs.

What not to do

After wet-weather riding

Even if there is no mud, wet-weather riding leaves moisture in the drivetrain and connectors.

  1. Wipe the bike down and dry the chain.
  2. Lubricate the chain — this is the most important action after a wet ride.
  3. Check electrical connectors for water ingress; disconnect and reseat them if in doubt.
  4. Test the brakes and all lights before the next ride.

Storage

Short-term storage (days to a few weeks)

Action
Clean and dry the bike
Leave the battery at roughly 40–70 % charge
Turn the power switch off
Store in a dry location, out of direct sun, away from freezing
Avoid leaving a fully charged pack in a hot environment

Long-term storage (weeks to months)

Step Detail
1. Clean thoroughly Dirt left on the bike attracts moisture and causes corrosion. Clean, then dry completely
2. Protect the drivetrain Lubricate the chain generously
3. Set the battery charge Charge to approximately 50 %. A full charge stresses the cells over time; a flat pack can permanently lose capacity or latch the BMS protection
4. Disconnect the battery Remove it if the model allows, or disconnect it so it cannot slowly discharge. Even switched off, some systems draw a small parasitic current
5. Store the battery correctly In a dry location within the recommended temperature range — approximately 68 °F (20 °C) to 45 °F (7 °C). Never store frozen or at extremely high temperatures; extreme temperatures will permanently damage the battery
6. Reduce tire pressure slightly Particularly in freezing conditions, where a fully inflated tire is more vulnerable
7. Protect from corrosion Apply a protective spray to metal surfaces if the storage location is damp. Lubricate cables
8. Cover the bike Use a breathable cover. Avoid plastic sheeting that traps condensation
9. Do not rest the bike on flat tires Support it so the tires are not taking the full weight in one spot if stored for months

Bringing the bike out of storage

  1. Inspect the full bike for corrosion, fluid leaks, cracks and pest damage.
  2. Bring the battery to room temperature before charging.
  3. Fully charge the battery.
  4. Check and correct the tire pressure.
  5. Check the chain tension and lubricate the chain.
  6. Check the brakes — lever feel, pad thickness and free movement.
  7. Test the throttle, lights, horn and display.
  8. Check all fasteners — axles, stem, calipers, pedals.
  9. Complete the Pre-Ride Inspection before riding.
  10. Ride gently for the first few minutes and re-check after the first ride.

Storage temperature reference

Condition Guidance
Recommended battery storage temperature ~68 °F (20 °C) to ~45 °F (7 °C)
Avoid Freezing conditions
Avoid Extremely high temperatures, direct sun on the pack, hot vehicles
Consequence of extremes Permanent battery damage

Warning reminders

From the CEMOTO owner manual:

Submerging the motorcycle in water can damage electrical and drive components.

Also note: never touch the motor or brakes immediately after use. These parts get very hot and can burn skin. Allow them to cool before cleaning or servicing.

Maintenance Log

A service-history record for your CEMOTO bike. Keeping one makes warranty claims easier, preserves resale value, and helps you spot recurring faults.

Why keep a log

Reason Detail
Warranty claims A dated record of inspections and servicing is evidence that the bike has been maintained. See Warranty Claims
Fault patterns A problem that returns every 300 km tells you something a single incident does not
Resale value A documented service history is worth money to a buyer
Scheduling You can see what is due next rather than trying to remember
Safety Wear trends — brake pads, chain stretch, tire tread — are easier to judge against a baseline

Your bike

Fill this in once and keep it with the log.

Field Value
Model
Color / variant
Serial number
Battery serial (if shown)
Date purchased
Order number
Purchased from
Warranty expiry
Motor serial
Controller serial

Where to find the serial number: usually stamped on the frame head tube or on a label on the frame/battery housing. Photograph it and keep the photo with your purchase receipt — the receipt and the serial number together are what a warranty claim is built on.

Log entry template

Copy this block for each entry.

Date:
Odometer / hours:
Work performed:
Parts replaced (name + part number):
  -
Torque values used:
Conditions noted (noise, heat, error codes):
  -
Performed by:
Cost:
Next action due:

Worked example

Date: 2026-04-12
Odometer / hours: 412 km
Work performed: 6-month service. Chain cleaned and lubricated,
  tension set to 15 mm. Front and rear brake pads inspected
  (approx. 4 mm remaining). All fasteners re-torqued. Controller
  fins cleaned.
Parts replaced (name + part number):
  - None
Torque values used: Rear axle 16 N·m (rear rack fixing screw);
  axle nuts re-torqued to manual spec
Conditions noted (noise, heat, error codes):
  - Faint clicking from rear wheel under load after 380 km.
    Wheel bearings checked — no roughness detected. Monitoring.
Performed by: Owner
Cost: £0
Next action due: Annual service at 12 months. Re-check rear wheel
  bearing at next monthly check.

Quick-reference service interval table

Condensed from the Maintenance Schedule. Tick as you go.

Interval Task Done
Pre-ride Brakes, throttle, tires, wheels, battery, frame, fasteners, chain slack, display, lights ☐
Post-ride (off-road) Clean drivetrain; inspect brakes; wipe frame; check tires; cool before touching motor/brakes ☐
Weekly Tire pressure; chain tension; brake pad thickness; drivetrain wear; spoke tension; suspension seals; fasteners; controller fins ☐
Monthly Battery health; electrical connectors; wiring harness; brake fluid; tire sidewalls; suspension bolts; chain elongation; lights and horn; brake cut-off test ☐
6 months Professional service; brake bleed; wheel bearings; suspension service; frame crack inspection; review this log ☐
Annually Full professional service; replace brake fluid; replace chain and sprocket as a set; assess battery capacity; frame/fork/swing arm fatigue check; replace cables ☐

Fault history

Keep a running list of every fault you have observed, including ones that resolved themselves. Recurring codes are a diagnostic trail — see Display & Error Codes.

Date Odometer Error code Symptom What fixed it Recurred?

Parts replaced

Date Odometer Part Part number Source Price

Part numbers are listed in Spare Parts & Compatibility.

Battery health tracker

Rechargeable packs average 1 to 2 years of service. Tracking range decline gives you early warning of a failing pack.

Date Odometer Charge time (empty → full) Typical range observed Notes

Reading the table: a falling range combined with a shorter charge time usually means reduced capacity — the pack is accepting less energy. Compare against the published range figures with your own weight, terrain and temperature in mind. See Battery Care & Charging.

Warranty-relevant records

If you make a warranty claim, CEMOTO may ask for some or all of the following. Keep them together:

Document Why it matters
Purchase receipt / order confirmation Proves purchase date and that you are the original purchaser
Serial number photograph Links the claim to a specific unit
This maintenance log Evidence of proper care
Photographs or video of the fault The single most useful item — see Contact & Support
Error code history If a code was displayed, note it here and in the fault history table above
Warranty registration confirmation See Warranty Registration