Yamaha YZ450F 2019 Maintenance Schedule
The 2019 Yamaha YZ450F maintenance schedule below covers the manufacturer's recommended service intervals for valve clearance, drive chain maintenance, general maintenance, oil, spark plugs, coolant, brake fluid, tires, battery and air filter. Intervals are shown in kilometres by default and can be switched to miles.
449ccEngine size
51Maintenance items
Official manufacturer manual
Sourced from ManualsLib (Yamaha YZ450F 2021 Owner's Service Manual) (this document covers model years 2018–2025): manualslib.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Valve clearance inspection & adjustment | Every 600 km · Every 2 operating hours | Advanced | Check the valve clearances. |
| Valve seat & valve face inspection | Every 12 operating hours | Advanced | Check valve seats and valve faces for wear; replace as required. |
| Valve spring inspection | Every 12 operating hours | Advanced | Check the free length; replace as required. |
| Valve lifter inspection | Every 12 operating hours | Advanced | Check for scratches and wear; replace as required. |
| Camshaft & decompression system inspection | Every 12 operating hours | Advanced | Inspect camshaft surface; inspect decompression system; replace as required. |
| Timing chain inspection | See notes | Advanced | Check for damage and sticking; replace as required. |
| Timing chain tensioner replacement | See notes | Advanced | Replace timing chain tensioner as required. |
| Camshaft sprocket inspection | Every 12 operating hours | Advanced | Check for wear on the teeth and for damage; replace as required. |
| Piston inspection | Every 12 operating hours | Expert | Inspect crack; inspect and eliminate carbon deposits; replace piston, pin, clip and rings as a set as required. |
| Piston ring inspection & replacement | See notes | Expert | Check piston ring end gap; replace as a set as required. |
| Piston pin inspection | See notes | Expert | Replace piston, pin, clip and rings as a set as required. |
| Cylinder head decarbonization | Every 12 operating hours | Expert | Check coolant passages for corrosion; inspect and eliminate carbon deposits; check for warpage and replace gasket as needed. |
| Cylinder inspection | See notes | Expert | Inspect score marks; inspect wear; replace as required. |
| Oil filter element replacement | Every 12 operating hours | Easy | Replace oil filter element. |
| Oil strainer cleaning | Every 12 operating hours | Easy | Clean oil strainer. |
| Clutch inspection & adjustment | Every 2 operating hours | Moderate | Inspect housing, friction plate, clutch plate and spring; replace as required. |
| Transmission inspection | Every 12 operating hours | Expert | Inspect; replace bearings as required. |
| Shift fork / shift cam / guide bar inspection | Every 12 operating hours | Expert | Inspect for wear. |
| Generator rotor nut torque check | Every 7 operating hours | Moderate | Check tightening torque. |
| Exhaust system inspection & cleaning | Every 7 operating hours | Easy–Moderate | Check for exhaust leaks and tightening torques; clean; replace fiber when exhaust sound becomes louder or performance drops. |
| Crankshaft inspection & cleaning | Every 12 operating hours | Expert | Inspect and clean. |
| Throttle body inspection | Every 12 operating hours | Moderate | Inspect throttle body. |
| Spark plug inspection & replacement | Every 2 operating hours | Easy | Check electrodes and terminals for wear; replace. |
| Cooling system inspection | Every 2 operating hours | Easy | Check coolant level and leakage; check radiator cap operation and attachment; inspect hoses. |
| Coolant replacement | Every 24 months · Replace every 24 months | Easy–Moderate | Replace coolant. |
| Engine guard inspection | See notes | Easy | Replace engine guard as required. |
| Frame cleaning & inspection | Every 2 operating hours | Easy | Clean and inspect frame. |
| Fuel tank & fuel pump inspection | Every 2 operating hours | Easy | Inspect fuel tank and fuel pump. |
| Fuel hose inspection & replacement | Every 48 months | Moderate | Inspect; replace as required. |
| Front fork leg service | Every 2 operating hours | Advanced | Clean; inspect and adjust; clean and grease oil seals and dust seals. |
| Front fork oil & oil seal replacement | Every 7 operating hours | Advanced | Replace fork oil; replace oil seal as required. |
| Front fork protector guide replacement | See notes | Moderate | Replace fork protector guide. |
| Rear shock absorber service | Every 2 operating hours | Advanced | Inspect and adjust; grease pillow balls and bearings (after rain ride); retighten mounting torques. |
| Brake lever/pedal, pivot & disc inspection | Every 2 operating hours | Moderate | Check tightening torques; adjust lever position and pedal height; lubricate pivot point; check brake disc surface; check fluid level and leakage; retighten disc/caliper/master-cylinder/union bolts. |
| Brake pad replacement | See notes | Moderate | Replace brake pads. |
| Brake fluid replacement | Every 12 months · Replace every 24 months | Moderate | Replace brake fluid. |
| Swingarm inspection | Every 2 operating hours | Moderate | Inspect, lube and retighten. |
| Relay arm / connecting rod (linkage) service | Every 2 operating hours | Moderate | Inspect, lube and retighten. |
| Steering head bearing service | Every 2 operating hours | Moderate | Inspect free play and retighten; clean and lube (after rain ride); replace bearings as required. |
| Tire, wheel & spoke inspection | Every 2 operating hours | Easy–Moderate | Inspect air pressure, wheel runout, tire wear and spoke looseness; retighten sprocket bolt. |
| Wheel bearing service | Every 12 operating hours | Moderate | Check bearing; lubricate; replace as required. |
| Drive chain maintenance | Every 2 operating hours | Easy | Clean, lubricate, check slack and alignment; replace as required. |
| Drive chain guide inspection | Every 2 operating hours | Easy | Inspect for wear. |
| Drive chain guide & support replacement | See notes | Easy–Moderate | Replace drive chain guide and drive chain support. |
| Cable routing, check & lubrication | Every 2 operating hours | Easy | Check routing/connection; check and grease; check throttle cables at throttle body for dirt and wear. |
| Clutch lever free play adjustment | See notes | Easy | Adjust clutch lever free play. |
| Brake pedal, footrest lubrication | Every 2 operating hours | Easy | Lubricate brake pedal and footrest pivots. |
| Chassis nuts & bolts torque check | Every 2 operating hours | Easy–Moderate | Retighten per Torque-Check Points. |
| Battery inspection | See notes | Easy | Check terminals for looseness and corrosion. |
| Engine oil change | Every 300 km · Every 2 operating hours | Easy | Check engine oil amount; replace engine oil. |
| Air filter cleaning & oiling | Every 100 km · Every 2 operating hours | Easy | Clean and lubricate; replace as required. |
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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