Yamaha Serow 250 / XT250 (DG17J / DG31J FI) — OEM Fluid, Tire Pressure & Maintenance Specs
249cc Air-Cooled Single SOHC 2-Valve FI (Low-Seat Mountain Trail) · Source: Yamaha Serow 250 / XT250 (DG17J / DG31J FI) (2008–2020) Official Owner’s Manual Maintenance Specifications
According to the Yamaha Serow 250 / XT250 (DG17J / DG31J FI) (2008–2020) Official Owner’s Manual Maintenance Specifications, the 2008–2020 Yamaha Serow 250 / XT250 (DG17J / DG31J FI) (chassis DG17J/DG31J/3C5/B7C) requires 1.2 L (1.27 US qt) of SAE 10W-40 (JASO MA2, API SG or higher) engine oil for a drain-only change and 1.3 L (1.37 US qt) with filter service (5TA-13440-00 / HF140). Standard solo cold tire pressure is 125 kPa / 1.25 bar / 18 PSI front (2.75-21 45P) and 150 kPa / 1.50 bar / 22 PSI rear (120/80-18M/C 62P), paired with 1× NGK DR7EA spark plug(s) and a YTZ7S battery.
Drain only: 1.2 L (1.27 US qt)
R 150 kPa (1.50 bar)
Est. Range: ~316 km (196 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 · JASO MA2 · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.2 L (1.27 US qt) • With filter/strainer: 1.3 L (1.37 US qt) • Complete dry overhaul: 1.4 L (1.48 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: 2.75-21 45P · Rear: 120/80-18M/C 62P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 125 kPa / 1.25 bar / 18 PSI Rear: 150 kPa / 1.50 bar / 22 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 125 kPa / 1.25 bar / 18 PSI Rear: 175 kPa / 1.75 bar / 25 PSI |
| OEM Spark Plug & Quantity | NGK DR7EA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ7S (12V 6.0Ah MF AGM) |
| Final Drive Maintenance | 428 Sealed O-Ring Chain — Maintain 35–45 mm trail slack |
| Brake Fluid & Coolant | DOT 4 · Air-Cooled Single Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 249 cc · 19.8 hp @ 7,500 rpm · 20.3 N·m (15.0 lb-ft) @ 6,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 830 mm (32.7 in) · 133 kg (293 lbs) |
| Fuel Tank & Est. Real-World Range | 9.3 L (2.5 US gal) · ~34 km/L → ~316 km (196 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 3,000 km / 6,000 km • Air Filter / Spark Plug: 12,000 km / 9,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Fuel-injected from 2008 (DG17J) through the 2018–2020 DG31J Final Edition (and sold in North America as XT250), the Serow 250 uniquely features a tubeless rear spoke rim (front uses a tube).
Oil & Clutch Mechanical Engineering Note
Using internal paper element HF140, refill 1.3 L w/ filter (1.2 L drain-only) of SAE 10W-40 JASO MA2 synthetic oil to handle slow mountain trail heat.