Yamaha WR250F (Reverse-Head FI Enduro) — OEM Fluid, Tire Pressure & Maintenance Specs
250cc Liquid-Cooled Single DOHC 4-Valve Reverse-Head Race Enduro · Source: Yamaha WR250F (Reverse-Head FI Enduro) (2015–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha WR250F (Reverse-Head FI Enduro) (2015–Present) Official Owner’s Manual Maintenance Specifications, the 2015–Present Yamaha WR250F (Reverse-Head FI Enduro) (chassis 2GB/B2W/BNN) requires 0.75 L (0.79 US qt) of SAE 10W-40 (JASO MA2, API SG or higher) engine oil for a drain-only change and 0.8 L (0.85 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 LMAR8E-J spark plug(s) and a HY85S / YTZ7S battery.
Drain only: 0.75 L (0.79 US qt)
R 100 kPa (1.00 bar)
Est. Range: ~148 km (92 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: 0.75 L (0.79 US qt) • With filter/strainer: 0.8 L (0.85 US qt) • Complete dry overhaul: 0.95 L (1.00 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 LMAR8E-J × 1 (Gap: 0.6–0.7 mm) |
| OEM Battery Code & Rating | HY85S / YTZ7S (12V LiFePO4 / AGM) |
| Final Drive Maintenance | 520 Enduro Sealed Chain — Maintain 50–60 mm 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 | 250 cc · 39.5 hp @ 12,000 rpm · 26.5 N·m (19.5 lb-ft) @ 9,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 955 mm (37.6 in) · 115 kg (254 lbs) |
| Fuel Tank & Est. Real-World Range | 7.4 L (2.0 US gal) · ~20 km/L → ~148 km (92 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
Built off the YZ250F motocrosser (not the street WR250R), the 2015+ WR250F combines a top-mounted forward airbox, reverse-inclined 4-valve head, radiator fan, and wide-ratio 6-speed gearbox.
Oil & Clutch Mechanical Engineering Note
Holding just 0.80 L with paper element HF140 while screaming past 13,000 rpm in tight woods, drain and replace full-synthetic SAE 10W-40 JASO MA2 oil every 10–12 hours.