Yamaha WR450F (Reverse-Head FI Enduro) — OEM Fluid, Tire Pressure & Maintenance Specs
450cc Liquid-Cooled Single DOHC 4-Valve Reverse-Head FI Enduro · Source: Yamaha WR450F (Reverse-Head FI Enduro) (2016–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha WR450F (Reverse-Head FI Enduro) (2016–Present) Official Owner’s Manual Maintenance Specifications, the 2016–Present Yamaha WR450F (Reverse-Head FI Enduro) (chassis 2GC/B7R/BHR) requires 0.65 L (0.69 US qt) of SAE 10W-40 (JASO MA2, API SG or higher) engine oil for a drain-only change and 0.72 L (0.76 US qt) with filter service (5TA-13440-00 / HF140). Standard solo cold tire pressure is 100 kPa / 1.00 bar / 15 PSI front (90/90-21 54M) and 100 kPa / 1.00 bar / 15 PSI rear (140/80-18 70M), paired with 1× NGK LMAR8G spark plug(s) and a HY85S / LiFePO4 battery.
Drain only: 0.65 L (0.69 US qt)
R 100 kPa (1.00 bar)
Est. Range: ~142 km (88 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 15W-50 (Track)) · JASO MA2 · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.65 L (0.69 US qt) • With filter/strainer: 0.72 L (0.76 US qt) • Complete dry overhaul: 0.9 L (0.95 US qt) |
| OEM Oil Filter Code & Type | 5TA-13440-00 / HF140 |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| Oil Drain Bolt Torque | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-21 54M · Rear: 140/80-18 70M (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 100 kPa / 1.00 bar / 15 PSI Rear: 100 kPa / 1.00 bar / 15 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 100 kPa / 1.00 bar / 15 PSI Rear: 120 kPa / 1.20 bar / 17 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8G × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | HY85S / LiFePO4 (12V 2.4Ah Lithium / YTZ7S) |
| Final Drive Maintenance | 520 Enduro O-Ring Chain — Maintain 50–60 mm suspension slack |
| Brake Fluid & Coolant | DOT 4 · Silicate-free ethylene-glycol OAT coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 450 cc · 54 hp @ 9,000 rpm · 48 N·m (35.4 lb-ft) @ 7,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 955 mm (37.6 in) · 119 kg (262 lbs) |
| Fuel Tank & Est. Real-World Range | 7.9 L (2.1 US gal) · ~18 km/L → ~142 km (88 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 500 km • Engine Oil / Filter: 1,000 km / 2,000 km • Air Filter / Spark Plug: 500 km / 4,000 km • Valve Clearance Check: 5,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Adopting the YZ450F’s forward-intake reverse-cylinder layout in 2016 (2GC) and slimmed further in 2019 (B7R) and 2024 (BHR), it features smartphone Power Tuner Wi-Fi mapping and wide-ratio 5-speed gearing.
Oil & Clutch Mechanical Engineering Note
As a purebred competition enduro holding just 0.72 L with paper filter HF140, change full-synthetic SAE 10W-40 or 10W-50 JASO MA2 oil every 10–15 engine hours (or ~1,000 km).