Yamaha YS125 2020 Maintenance Schedule
The 2020 Yamaha YS125 maintenance schedule below covers the manufacturer's recommended service intervals for general maintenance, spark plugs, valve clearance, air filter, brake fluid, tires and drive chain maintenance. Intervals are shown in kilometres by default and can be switched to miles.
125ccEngine size
29Maintenance items
Official manufacturer manual
Sourced from Yamaha YS125-5C Owner's Manual BT4-F8199-E0 (this document covers model years 2017–2022): manualslib.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Fuel Line Hose Inspection | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy–Moderate | Check fuel hoses for cracks or damage; replace if necessary. |
| Spark Plug Clean and Regap | Every 12,000 km (first at 6,000 km) | Easy–Moderate | Check condition; adjust gap and clean spark plug. |
| Spark Plug Replacement | See notes | 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. |
| Engine Idle Speed Check | Every 6,000 km (first at 1,000 km) · Every 12 months | Easy–Moderate | Check and adjust engine idle speed (fuel injection). |
| Exhaust System Check | Every 6,000 km (first at 1,000 km) | Easy | Check exhaust system for leakage; tighten if necessary; replace gasket if necessary. |
| Diagnostic System Check | Every 6,000 km (first at 1,000 km) · Every 12 months | Moderate | Perform dynamic inspection using Yamaha diagnostic tool; check the error codes. |
| Air Filter Element Clean/Replace | Every 12,000 km (first at 12,000 km) | Easy | Clean air filter element; replace as needed. |
| Air Filter Case Hose Cleaning | Every 6,000 km (first at 1,000 km) | Easy | Clean air filter case check hose. |
| Clutch Operation Check and Adjust | Every 6,000 km (first at 1,000 km) | Easy–Moderate | Check clutch operation; adjust as needed. |
| Front Brake System Check | Every 6,000 km (first at 1,000 km) · Every 12 months | Moderate | Check front brake operation, fluid level, and for fluid leakage. |
| Front Brake Pad Replacement | See notes | Moderate | Replace front brake pads if necessary. |
| Rear Brake Check and Pedal Free Play Adjust | Every 6,000 km (first at 1,000 km) · Every 12 months | Moderate | Check rear brake operation; adjust brake pedal free play. |
| Rear Brake Shoe Replacement | See notes | Moderate | Replace rear brake shoes if necessary. |
| Brake Hose Inspection | Every 6,000 km (first at 6,000 km) · Every 12 months | Moderate | Check brake hose for cracks or damage. |
| Brake Hose Replacement | Every 48 months · Replace every 48 months | Moderate | Replace brake hose. |
| Brake Fluid Change | Every 24 months · Replace every 24 months | Moderate | Change brake fluid. |
| Wheel Runout and Damage Check | Every 6,000 km (first at 6,000 km) | Moderate | Check wheel runout and for damage; replace if necessary. |
| Tire Tread Depth and Damage Check | Every 6,000 km (first at 6,000 km) · Every 12 months | Moderate | Check tread depth and for damage; replace if necessary. Also check and correct tire air pressure. |
| Wheel Bearing Check | Every 6,000 km (first at 6,000 km) | Moderate | Check wheel bearing for looseness or damage. |
| Swingarm Pivot Bush Check | Every 6,000 km (first at 6,000 km) | Moderate | Check swingarm pivot bush assemblies for looseness. |
| Swingarm Pivot Bush Lubrication | Every 12,000 km (first at 12,000 km) | Easy–Moderate | Lubricate swingarm pivot bushes 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 thoroughly with a special O-ring chain lubricant. |
| Steering Bearing Assembly Check | Every 6,000 km (first at 1,000 km) | Moderate | Check steering bearing assemblies for looseness. |
| Steering Bearing Repack | Every 24,000 km (first at 24,000 km) | Moderate | Moderately repack steering bearings with lithium-soap-based grease. |
| Chassis Fastener Torque Check | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy–Moderate | Make sure that all nuts, bolts and screws are properly tightened. |
| Brake Lever Pivot Shaft Lubrication | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate brake lever pivot shaft with silicone grease. |
| Brake Pedal Pivot Shaft Lubrication | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate brake pedal pivot shaft with lithium-soap-based grease. |
| Clutch Lever Pivot Shaft Lubrication | Every 6,000 km (first at 6,000 km) · Every 12 months | Easy | Lubricate clutch lever pivot shaft with lithium-soap-based grease. |
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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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