Suzuki Grasstracker Bigboy 250 — OEM Fluid, Tire Pressure & Maintenance Specs
249cc Air-Cooled Single SOHC (19/18-Inch Knobby Street Tracker) · Source: Suzuki Grasstracker Bigboy 250 (2001–2017) Official Owner’s Manual Maintenance Specifications
According to the Suzuki Grasstracker Bigboy 250 (2001–2017) Official Owner’s Manual Maintenance Specifications, the 2001–2017 Suzuki Grasstracker Bigboy 250 (chassis NJ4BA/NJ4DA) requires 1.3 L (1.37 US qt) of SAE 10W-40 (JASO MA2, API SJ/SL/SM) engine oil for a drain-only change and 1.4 L (1.48 US qt) with filter service (16510-38240 / HF136). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (100/90-19 M/C 57P) and 200 kPa / 2.00 bar / 29 PSI rear (130/80-18 M/C 66P), paired with 1× NGK MR8E-9 / CR8E spark plug(s) and a YTX7L-BS / YTX9-BS battery.
Drain only: 1.3 L (1.37 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~204 km (127 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 SJ/SL/SM |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.3 L (1.37 US qt) • With filter/strainer: 1.4 L (1.48 US qt) • Complete dry overhaul: 1.7 L (1.80 US qt) |
| OEM Oil Filter Code & Type | 16510-38240 / HF136 |
| 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 | 21 N·m (15.5 lb-ft / 2.14 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 100/90-19 M/C 57P · Rear: 130/80-18 M/C 66P (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| OEM Spark Plug & Quantity | NGK MR8E-9 / CR8E × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX7L-BS / YTX9-BS (12V 6.0–8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed O/X-Ring Chain — Maintain 25–35 mm slack and lube every 800–1,000 km |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 249 cc · 19 hp @ 7,500 rpm · 21 N·m (15.5 lb-ft) @ 6,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 775 mm (30.5 in) · 139 kg (306 lbs) |
| Fuel Tank & Est. Real-World Range | 6 L (1.6 US gal) · ~34 km/L → ~204 km (127 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 5,000 km / 10,000 km • Air Filter / Spark Plug: 12,000 km / 10,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Tall-wheeled 19/18-inch Bigboy edition of Suzuki’s AMA dirt-track-inspired street scrambler, fuel-injected from 2008–2017 (NJ4DA).
Oil & Clutch Mechanical Engineering Note
Suzuki 125–250cc lightweight manual-clutch platform (GSX-R/S125, V-Strom 250SX, TU250X) running SAE 10W-40 JASO MA2 oil.