Kawasaki Vulcan 900 Custom — OEM Fluid, Tire Pressure & Maintenance Specs
903cc Liquid-Cooled 55° V-Twin SOHC 8-Valve (21-Inch Cast Front · Drag-Bar Custom) · Source: Kawasaki Vulcan 900 Custom (2007–Present) Official Owner’s Manual Maintenance Specifications
According to the Kawasaki Vulcan 900 Custom (2007–Present) Official Owner’s Manual Maintenance Specifications, the 2007–Present Kawasaki Vulcan 900 Custom (chassis VN900C) requires 3 L (3.17 US qt) of SAE 10W-40 (JASO MA2, API SG/SJ/SL) engine oil for a drain-only change and 3.2 L (3.38 US qt) with filter service (16097-0008 / HF303). Standard solo cold tire pressure is 225 kPa / 2.25 bar / 33 PSI front (80/90-21 M/C 48H) and 200 kPa / 2.00 bar / 29 PSI rear (180/70-15 M/C 76H), paired with 2× NGK CPR7EA-9 spark plug(s) and a YTX12-BS battery.
Drain only: 3 L (3.17 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~390 km (242 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 10W-50) · JASO MA2 · API SG/SJ/SL |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3 L (3.17 US qt) • With filter/strainer: 3.2 L (3.38 US qt) • Complete dry overhaul: 3.7 L (3.91 US qt) |
| OEM Oil Filter Code & Type | 16097-0008 / HF303 |
| 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 | 29 N·m (21.4 lb-ft / 2.96 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 80/90-21 M/C 48H · Rear: 180/70-15 M/C 76H (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 225 kPa / 2.25 bar / 33 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 225 kPa / 2.25 bar / 33 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK CPR7EA-9 × 2 (Gap: 0.7–0.9 mm) |
| OEM Battery Code & Rating | YTX12-BS (12V 10.0Ah MF AGM) |
| Final Drive Maintenance | 28mm Kevlar-Reinforced Final Drive Belt — Inspect belt deflection |
| Brake Fluid & Coolant | DOT 4 · Silicate-free ethylene-glycol OAT coolant (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 903 cc · 50 hp @ 5,700 rpm · 78 N·m (57.5 lb-ft) @ 3,700 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 685 mm (27.0 in) · 277 kg (611 lbs) |
| Fuel Tank & Est. Real-World Range | 20 L (5.3 US gal) · ~19.5 km/L → ~390 km (242 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 12,000 km • Air Filter / Spark Plug: 12,000 km / 12,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Chopper-styled sibling to the Vulcan 900 Classic sporting tubeless 21-inch cast front and 15-inch solid rear wheels with forward footpegs.
Oil & Clutch Mechanical Engineering Note
Kawasaki single-cylinder retro & dual-sport family (Z125, W230, KLX230/250/300, KLR650) running internal paper element HF112 and SAE 10W-40 JASO MA2.