Suzuki GSX1400 — OEM Fluid, Tire Pressure & Maintenance Specs
1,402cc Air/Oil-Cooled (SACS) Inline-4 DOHC 16-Valve (Ultimate Big-Bore SACS Naked) · Source: Suzuki GSX1400 (2001–2008) Official Owner’s Manual Maintenance Specifications
According to the Suzuki GSX1400 (2001–2008) Official Owner’s Manual Maintenance Specifications, the 2001–2008 Suzuki GSX1400 (chassis GY71A/WVBN) requires 4 L (4.23 US qt) of SAE 10W-40 (JASO MA2, API SJ/SL/SM/SN) engine oil for a drain-only change and 4.2 L (4.44 US qt) with filter service (16510-07J00 / HF138 (M20×1.0 Fine Thread)). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70 ZR17 M/C (58W)) and 290 kPa / 2.90 bar / 42 PSI rear (190/50 ZR17 M/C (73W)), paired with 4× NGK CR8EK spark plug(s) and a YTX14-BS battery.
Drain only: 4 L (4.23 US qt)
R 290 kPa (2.90 bar)
Est. Range: ~352 km (219 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: 4 L (4.23 US qt) • With filter/strainer: 4.2 L (4.44 US qt) • Complete dry overhaul: 4.8 L (5.07 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 M/C (58W) · Rear: 190/50 ZR17 M/C (73W) (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | NGK CR8EK × 4 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX14-BS (12V 12.0Ah MF AGM) |
| Final Drive Maintenance | 530 Heavy-Duty Chain — Maintain 20–30 mm slack |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled SACS Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 1402 cc · 106 hp @ 6,800 rpm · 126 N·m (92.9 lb-ft) @ 5,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 790 mm (31.1 in) · 255 kg (562 lbs) |
| Fuel Tank & Est. Real-World Range | 22 L (5.8 US gal) · ~16 km/L → ~352 km (219 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
Crowning monument of Suzuki’s SACS air/oil-cooled inline-four era, circulating 4.2 L of oil (with filter HF138) and making 126 N·m at 5,000 rpm.
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.