Yamaha MT-125 2021 Maintenance Schedule
The 2021 Yamaha MT-125 maintenance schedule below covers the manufacturer's recommended service intervals for general maintenance, spark plugs, valve clearance, air filter, brake fluid, tires, drive chain maintenance, oil and coolant. Intervals are shown in kilometres by default and can be switched to miles.
124ccEngine size
43Maintenance items
Official manufacturer manual
Sourced from Yamaha MT-125 2023 Owner's Manual (doc EAU71021/EAU71041/EAU71344) (this document covers model years 2020–2025): manualslib.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Fuel line - check for cracks or damage | Every 6,000 km (first at 6,000 km) · Every 12 months | Moderate | Check fuel hoses for cracks or damage. |
| Spark plug - check condition, clean and regap | Every 12,000 km (first at 6,000 km) | Easy–Moderate | Check condition; clean and regap. |
| Spark plug - replace | Every 12,000 km (first at 12,000 km) · Replace every 12,000 km | Easy–Moderate | Replace spark plug. |
| Valve clearance - check and adjust | Every 6,000 km (first at 6,000 km) | Advanced | Check and adjust valve clearance. |
| Fuel injection - check and adjust idle speed | Every 6,000 km (first at 1,000 km) · Every 1 month | Moderate | Check and adjust engine idle speed. |
| Exhaust system - tighten and check gaskets | Every 6,000 km (first at 1,000 km) | Moderate | Check for leakage; tighten if necessary; replace gasket if necessary. |
| Evaporative emission control system - check (California only) | Every 12,000 km (first at 12,000 km) | Moderate | Check control system for damage; replace if necessary. |
| Diagnostic system - dynamic inspection and error code check | Every 6,000 km (first at 1,000 km) · Every 1 month | Moderate | Perform dynamic inspection using Yamaha diagnostic tool; check the error codes. |
| Air filter element - replace | Every 12,000 km (first at 12,000 km) · Replace every 12,000 km | Easy | Replace air filter element. |
| Air filter case check hose - clean | Every 6,000 km (first at 1,000 km) | Easy | Clean. |
| Clutch - check operation and adjust | Every 6,000 km (first at 1,000 km) | Easy–Moderate | Check operation; adjust. |
| Front brake - check operation, fluid level and leakage | Every 6,000 km (first at 1,000 km) · Every 12 months | Moderate | Check operation, fluid level, and for fluid leakage; replace brake pads if necessary. |
| Rear brake - check operation, fluid level and leakage | Every 6,000 km (first at 1,000 km) · Every 12 months | Moderate | Check operation, fluid level, and for fluid leakage; replace brake pads if necessary. |
| Brake hoses - check for cracks or damage | Every 6,000 km (first at 6,000 km) · Every 12 months | Moderate | Check for cracks or damage. |
| Brake hoses - replace | Every 48 months · Replace every 48 months | Moderate | Replace brake hoses. |
| Brake fluid - change | Every 24 months · Replace every 24 months | Moderate | Change brake fluid. |
| Wheels - check runout and for damage | Every 6,000 km (first at 6,000 km) | Moderate | Check runout and for damage. |
| Tires - check tread depth, air pressure and for damage | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Check tread depth and for damage; check air pressure; correct/replace if necessary. |
| Wheel bearings - check for looseness or damage | Every 6,000 km (first at 6,000 km) | Moderate | Check bearing for looseness or damage. |
| Swingarm pivot bearings - check operation and play | Every 6,000 km (first at 6,000 km) | Moderate | Check operation and for excessive play. |
| Swingarm pivot bearings - lubricate | Every 24,000 km (first at 24,000 km) | Moderate | Lubricate with lithium-soap-based grease. |
| Drive chain - check, adjust and lubricate | Every 1,000 km (first at 1,000 km) | Easy | Check chain slack, alignment and condition; adjust and lubricate chain with a special O-ring chain lubricant thoroughly. |
| Steering bearings - check for looseness | See notes | Moderate | Check bearing assemblies for looseness. |
| Steering bearings - repack | See notes | Moderate | Moderately repack with lithium-soap-based grease. |
| Chassis fasteners - check tightness | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Make sure that all nuts, bolts and screws are properly tightened. |
| Brake lever pivot shaft - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate with silicone grease. |
| Brake pedal pivot shaft - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate with lithium-soap-based grease. |
| Clutch lever pivot shaft - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate with lithium-soap-based grease. |
| Shift pedal pivot shaft - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate with lithium-soap-based grease. |
| Sidestand - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate with molybdenum disulfide grease. |
| Sidestand switch - check operation | Every 6,000 km (first at 1,000 km) · Every 1 month | Easy | Check operation and replace if necessary. |
| Front fork - check operation and oil leakage | Every 6,000 km (first at 6,000 km) | Moderate | Check operation and for oil leakage; replace if necessary. |
| Shock absorber assembly - check operation and oil leakage | Every 6,000 km (first at 6,000 km) | Moderate | Check operation and for oil leakage; replace if necessary. |
| Rear suspension relay arm and connecting arm - check operation | Every 6,000 km (first at 6,000 km) | Moderate | Check operation. |
| Rear suspension relay arm and connecting arm pivots - lubricate | Every 12,000 km (first at 12,000 km) | Moderate | Lubricate with lithium-soap-based grease. |
| Engine oil - change | Every 3,000 km (first at 1,000 km) · Every 12 months | Easy | Change engine oil (warm engine before draining). |
| Engine oil filter element - replace | Every 6,000 km (first at 1,000 km) | Easy | Replace oil filter element. |
| Cooling system - check coolant level and leakage | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Check coolant level and vehicle for coolant leakage. |
| Cooling system - change coolant | Every 36 months · Replace every 36 months | Easy–Moderate | Change coolant. |
| Front and rear brake switches - check operation | Every 6,000 km (first at 1,000 km) · Every 1 month | Easy | Check operation. |
| Moving parts and cables - lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate. |
| Throttle grip housing and cable - check free play, adjust and lubricate | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Check operation and free play; adjust the throttle cable free play if necessary; lubricate the throttle grip housing and cable. |
| Lights, signals and switches - check operation and adjust headlight | Every 6,000 km (first at 1,000 km) · Every 1 month | Easy | Check operation; adjust headlight beam. |
No maintenance items match your search.
Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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