| Task | Every 20h / 1 month | Every 50h / 3 months | Every 100h / 6 months | |------|--------------------|----------------------|-----------------------| | Change engine oil | ✔ | | | | Clean air filter (foam) | ✔ | | | | Check chain tension | ✔ | | | | Inspect spark plug | | ✔ | | | Adjust valves (0.05–0.08 mm) | | | ✔ | | Replace oil | | | ✔ | | Check brake pads | | | ✔ |
The electrical system on a 125cc ATV relies on a simple CDI (Capacitor Discharge Ignition) network. If your machine loses spark, check these components in order: hb atv 125 service manual
Spray the entire length of the chain with a high-quality motorcycle chain lube. 5. Valve Clearance Adjustment | Task | Every 20h / 1 month