Suzuki Inazuma 400 (GK7BA) — OEM Fluid, Tire Pressure & Maintenance Specs
399cc Air/Oil-Cooled (SACS) Inline-4 DOHC 16-Valve (Brembo-Equipped SACS Classic) · Source: Suzuki Inazuma 400 (GK7BA) (1997–2002) Official Owner’s Manual Maintenance Specifications
According to the Suzuki Inazuma 400 (GK7BA) (1997–2002) Official Owner’s Manual Maintenance Specifications, the 1997–2002 Suzuki Inazuma 400 (GK7BA) (chassis GK7BA) requires 3.3 L (3.49 US qt) of SAE 10W-40 (JASO MA2, API SJ/SL/SM/SN) engine oil for a drain-only change and 3.6 L (3.80 US qt) with filter service (16510-07J00 / HF138 (M20×1.0 Fine Thread)). Standard solo cold tire pressure is 225 kPa / 2.25 bar / 33 PSI front (120/70 ZR17 (58W)) and 250 kPa / 2.50 bar / 36 PSI rear (170/60 ZR17 (72W)), paired with 4× NGK JR8B spark plug(s) and a YTZ10S / YTX12-BS battery.
Drain only: 3.3 L (3.49 US qt)
R 250 kPa (2.50 bar)
Est. Range: ~342 km (213 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 SJ/SL/SM/SN |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3.3 L (3.49 US qt) • With filter/strainer: 3.6 L (3.80 US qt) • Complete dry overhaul: 4.5 L (4.76 US qt) |
| OEM Oil Filter Code & Type | 16510-07J00 / HF138 (M20×1.0 Fine Thread) |
| 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 | 23 N·m (17.0 lb-ft / 2.35 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70 ZR17 (58W) · Rear: 170/60 ZR17 (72W) (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 225 kPa / 2.25 bar / 33 PSI Rear: 250 kPa / 2.50 bar / 36 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 JR8B × 4 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ10S / YTX12-BS (12V 8.6–10Ah MF AGM) |
| Final Drive Maintenance | 525 Heavy-Duty Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/lube regularly |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled SACS Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 399 cc · 52 hp @ 11,000 rpm · 36 N·m (26.6 lb-ft) @ 9,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 760 mm (29.9 in) · 207 kg (456 lbs) |
| Fuel Tank & Est. Real-World Range | 18 L (4.8 US gal) · ~19 km/L → ~342 km (213 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 18,000 km • Air Filter / Spark Plug: 18,000 km / 12,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Rare 400cc SACS air/oil-cooled inline-four sharing big-bike proportions with the Inazuma 1200 plus factory Brembo 4-piston front calipers.
Oil & Clutch Mechanical Engineering Note
Suzuki multi-cylinder family exclusively uses a proprietary M20×1.0 fine-thread spin-on filter (16510-07J00 / HF138)—never force an M20×1.5 filter onto the boss.