Yamaha YZ450F (2025)
Fluid capacities, consumables, drivetrain, tire pressure & wear limits
The Yamaha YZ450F (2025) takes 0.96 L of oil with a filter change (0.94 L without).
Fluid Capacities
Oil capacity (with filter)0.96 LWith oil filter removal/replacement
Oil capacity (without filter)0.94 LOil change only
Oil capacity (dry fill)1.2 LFull disassembly refill
Coolant (radiator)1.03 LRadiator including all routes — no separate reserve tank on this bike
Consumables
Engine oil gradeYamalube SAE 10W-40, 10W-50, 15W-40, 20W-40 or 20W-50, API SG or higher, JASO MA
Coolant typeYamaha coolant or equivalent high-quality ethylene glycol antifreeze for aluminum engines
Oil filter (OEM)5D3-13440-09Web-confirmed through MY2024; extended to MY2025 on an unchanged engine.
Air filter (OEM)BHR-14451-00Web-confirmed for YZ450F 2023-2026.
Spark plug (OEM)NGK LMAR8G
Drive chain520 non-sealed, 114 links
Front brake pads (OEM)Yamaha B2W-25805-00From current Yamaha parts catalog (thinner confirmation than the rear pad). Wear limit only — no standard thickness published.
Rear brake pads (OEM)Yamaha 1C3-W0046-50Web-confirmed for YZ125/250F/450F 2006-2023. Wear limit only — no standard thickness published.
Clutch free play7–12 mmAt clutch lever end, cable-actuated
Drivetrain
Chain size520
Chain links114
Chain slack50–60 mmMeasured with the bike on a maintenance stand
Front sprocket (OEM)13TDerived from secondary reduction ratio 3.769 (49/13)
Rear sprocket (OEM)49TDerived from secondary reduction ratio 3.769 (49/13)
Brakes & Tires
Front tire size80/100-21 51M, tube type
Rear tire size120/80-19 63M, tube type
Front tire pressure100 kPa
Rear tire pressure100 kPa
Brake fluid typeDOT 4
Wear Limits
Front brake disc (min)2.5 mm
Rear brake disc (min)3.5 mm
Brake pad — front (min)1 mm
Brake pad — rear (min)1 mm
Clutch friction plate (min)2.02 mmBoth friction plate 1 and friction plate 2 share this limit