Suzuki Boulevard S40 (Savage 650) — OEM Fluid, Tire Pressure & Maintenance Specs
652cc Air-Cooled Single SOHC 4-Valve (173 kg Belt-Drive Thumper Cruiser) · Source: Suzuki Boulevard S40 (Savage 650) (1986–2019) Official Owner’s Manual Maintenance Specifications
According to the Suzuki Boulevard S40 (Savage 650) (1986–2019) Official Owner’s Manual Maintenance Specifications, the 1986–2019 Suzuki Boulevard S40 (Savage 650) (chassis NP41A/LS650) requires 1.8 L (1.90 US qt) of SAE 10W-40 (JASO MA2, API SJ/SL/SM) engine oil for a drain-only change and 2.1 L (2.22 US qt) with filter service (16510-37440 / HF137). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (100/90-19 M/C 57H) and 225 kPa / 2.25 bar / 33 PSI rear (140/80-15 M/C 67H), paired with 1× NGK MR8E-9 / CR8E spark plug(s) and a YTX7L-BS / YTX9-BS battery.
Drain only: 1.8 L (1.90 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~231 km (144 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: 1.8 L (1.90 US qt) • With filter/strainer: 2.1 L (2.22 US qt) • Complete dry overhaul: 2.4 L (2.54 US qt) |
| OEM Oil Filter Code & Type | 16510-37440 / HF137 |
| 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 57H · Rear: 140/80-15 M/C 67H (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 250 kPa / 2.50 bar / 36 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 | Toothed Belt Final Drive — Inspect belt tension and pulley wear |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 652 cc · 31 hp @ 5,400 rpm · 50 N·m (36.9 lb-ft) @ 3,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 700 mm (27.6 in) · 173 kg (381 lbs) |
| Fuel Tank & Est. Real-World Range | 10.5 L (2.8 US gal) · ~22 km/L → ~231 km (144 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
Produced for 33 years (first as LS650 Savage, then Boulevard S40), pairing a thumping 652cc air-cooled single with clean belt final drive.
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.