# 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](https://wiki.cemotoride.com/link/389) |
| **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](https://wiki.cemotoride.com/link/323). 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](https://wiki.cemotoride.com/link/332).

| 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](https://wiki.cemotoride.com/link/382).

---

## 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](https://wiki.cemotoride.com/link/380) with your own weight, terrain and temperature in mind. See [Battery Care & Charging](https://wiki.cemotoride.com/link/321).

---

## 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](https://wiki.cemotoride.com/link/378) |
| **Error code history** | If a code was displayed, note it here and in the fault history table above |
| **Warranty registration confirmation** | See [Warranty Registration](https://wiki.cemotoride.com/link/390) |

---

## Related pages

- [Maintenance Schedule](https://wiki.cemotoride.com/link/323)
- [Torque & Fastener Reference](https://wiki.cemotoride.com/link/325)
- [Battery Care & Charging](https://wiki.cemotoride.com/link/321)
- [Cleaning & Storage](https://wiki.cemotoride.com/link/322)
- [Spare Parts & Compatibility](https://wiki.cemotoride.com/link/382)
- [Warranty Claims](https://wiki.cemotoride.com/link/389)