Yamaha MT-03 321 2020 Maintenance Schedule
The 2020 Yamaha MT-03 321 maintenance schedule below covers the manufacturer's recommended service intervals for oil, general maintenance, spark plugs, air filter, tires, coolant, valve clearance, brake fluid and drive chain maintenance. Intervals are shown in kilometres by default and can be switched to miles.
321ccEngine size
44Maintenance items
Official manufacturer manual
Sourced from Yamaha MT03P Owner's Manual B5W-F8199-13, LIT-11626-36-61 (US market) (this document covers model years 2020–2024): library.ymcapps.net
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Engine oil & filter change | Every 5,000 km (first at 1,000 km) | Easy | Change engine oil (warm engine before draining). |
| Fuel line inspection | Every 5,000 km · Every 6 months | Easy | Check fuel hoses for cracks or damage; replace if necessary. |
| Spark plug check, gap adjustment and cleaning | See notes | Moderate | Check condition, adjust gap and clean spark plugs. |
| Crankcase breather system check | Every 5,000 km · Every 6 months | Easy | Check breather hose for cracks or damage; replace if necessary. |
| Fuel injection synchronization adjustment | Every 5,000 km · Every 6 months | Moderate | Adjust synchronization. |
| Exhaust system check | Every 5,000 km · Every 6 months | Easy | Check for leakage; tighten if necessary; replace gasket(s) if necessary. |
| Evaporative emission control system check | See notes | Easy | Check control system for damage (California only); replace if necessary. |
| Air induction system check | See notes | Easy | Check the air cut-off valve, reed valve, and hose for damage; replace any damaged parts. |
| Diagnostic system check | Every 5,000 km (first at 1,000 km) · Every 6 months | Moderate | Perform dynamic inspection using Yamaha diagnostic tool; check error codes. |
| Air filter element replacement | See notes | Easy | Replace air filter element. |
| Air filter check hose cleaning | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Clean the air filter check hose. |
| Clutch operation check | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy–Moderate | Check operation; adjust or replace cable. |
| Front brake inspection | Every 5,000 km (first at 1,000 km) · Every 6 months | Moderate | Check operation, fluid level, and for fluid leakage; replace brake pads if necessary. |
| Rear brake inspection | Every 5,000 km (first at 1,000 km) · Every 6 months | Moderate | Check operation, fluid level, and for fluid leakage; replace brake pads if necessary. |
| Brake hose inspection | Every 5,000 km · Every 6 months | Moderate | Check for cracks or damage, correct routing and clamping. |
| Brake hose replacement | Every 48 months · Replace every 48 months | Moderate | Replace brake hose. |
| Wheel inspection | Every 5,000 km · Every 6 months | Moderate | Check runout and for damage; replace if necessary. |
| Tire inspection | Every 5,000 km · Every 6 months | Moderate | Check tread depth and for damage; replace if necessary; check air pressure and correct if necessary. |
| Wheel bearing inspection | Every 5,000 km · Every 6 months | Moderate | Check bearings for smooth operation; replace if necessary. |
| Swingarm pivot bearing check | Every 11,000 km | Moderate | Check bearing assemblies for looseness. |
| Swingarm pivot bearing lubrication | Every 21,000 km | Moderate | Moderately repack with lithium-soap-based grease. |
| Steering bearing check | See notes | Moderate | Check bearing assemblies for looseness. |
| Steering bearing repack | See notes | Moderate | Repack steering bearings with grease. |
| Chassis fastener check | Every 5,000 km · Every 6 months | Easy | Check all chassis fitting and fasteners; correct if necessary. |
| Brake lever pivot shaft lubrication | Every 5,000 km · Every 6 months | Easy | Apply silicone grease lightly. |
| Brake pedal pivot shaft lubrication | Every 5,000 km · Every 6 months | Easy | Apply lithium-soap-based grease lightly. |
| Clutch lever pivot shaft lubrication | Every 5,000 km · Every 6 months | Easy | Apply lithium-soap-based grease lightly. |
| Shift pedal pivot shaft lubrication | Every 5,000 km · Every 6 months | Easy | Apply lithium-soap-based grease lightly. |
| Sidestand pivot check and lubrication | Every 5,000 km · Every 6 months | Easy | Check operation; apply lithium-soap-based grease lightly. |
| Sidestand switch check | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Check operation; replace if necessary. |
| Front fork inspection | Every 5,000 km · Every 6 months | Moderate | Check operation and for oil leakage; replace if necessary. |
| Shock absorber inspection | Every 5,000 km · Every 6 months | Moderate | Check operation and for oil leakage; replace if necessary. |
| Engine oil level check | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Check oil level and vehicle for oil leakage. |
| Engine oil filter cartridge replacement | Every 10,000 km (first at 1,000 km) | Easy | Replace engine oil filter cartridge. |
| Cooling system inspection | Every 5,000 km · Every 6 months | Easy–Moderate | Check hoses for cracks or damage; replace if necessary. |
| Front and rear brake switch check | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Check operation. |
| Control cable lubrication | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Apply Yamaha cable lubricant or other suitable cable lubricant thoroughly. |
| Throttle grip check, adjust and lubricate | Every 5,000 km · Every 6 months | Easy | Check operation and free play, adjust if necessary; lubricate cable and grip housing. |
| Lights, signals and switches check | Every 5,000 km (first at 1,000 km) · Every 6 months | Easy | Check operation; adjust headlight beam. |
| Spark plug replacement | Every 10,000 km (first at 11,000 km) · Every 12 months · Replace every 10,000 km | Moderate | Replace spark plugs. |
| Valve clearance inspection | Every 42,000 km | Advanced | Check and adjust valve clearance when engine is cold. |
| Brake fluid replacement | Every 10,000 km · Every 24 months · Replace every 24 months | Moderate | Change brake fluid. |
| Coolant replacement | Every 10,000 km · Every 24 months · Replace every 24 months | Moderate | Change coolant. |
| Drive chain maintenance | Every 800 km | Easy | Check chain slack, alignment and condition; adjust and lubricate with a special O-ring chain lubricant. |
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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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