Suzuki GSX-8R / GSX-8S — OEM Fluid, Tire Pressure & Maintenance Specs
776cc Liquid-Cooled Parallel-Twin DOHC 270° Crank + Cross Balancer (Wet SCAS Clutch) · Source: Suzuki GSX-8R / GSX-8S Official Owner’s Manual Maintenance Specifications
According to the Suzuki GSX-8R / GSX-8S Official Owner’s Manual Maintenance Specifications, the 2023–Present Suzuki GSX-8R / GSX-8S (chassis EM1/GSX800R) requires 3 L (3.17 US qt) of SAE 10W-40 (JASO MA2, API SJ/SL/SM/SN) engine oil for a drain-only change and 3.5 L (3.70 US qt) with filter service (16510-07J00 / HF138). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70ZR17 M/C (58W)) and 250 kPa / 2.50 bar / 36 PSI rear (180/55ZR17 M/C (73W)), paired with 2× NGK LMAR8BI-9 spark plug(s) and a FTZ10S / YTZ10S battery.
Drain only: 3 L (3.17 US qt)
R 250 kPa (2.50 bar)
Est. Range: ~333 km (207 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/SN |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3 L (3.17 US qt) • With filter/strainer: 3.5 L (3.70 US qt) • Complete dry overhaul: 3.9 L (4.12 US qt) |
| OEM Oil Filter Code & Type | 16510-07J00 / HF138 |
| 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: 120/70ZR17 M/C (58W) · Rear: 180/55ZR17 M/C (73W) (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8BI-9 × 2 (Gap: 0.8–0.9 mm (Laser Iridium)) |
| OEM Battery Code & Rating | FTZ10S / YTZ10S (12V 8.6Ah MF AGM) |
| Final Drive Maintenance | 525 Sealed Chain (118 links) — Slack 20–30 mm on sidestand |
| Brake Fluid & Coolant | DOT 4 · Suzuki Super Long Life Blue Coolant |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 776 cc · 82.9 hp @ 8,500 rpm · 78 N·m (57.5 lb-ft) @ 6,800 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 810 mm (31.9 in) · 205 kg (452 lbs) |
| Fuel Tank & Est. Real-World Range | 14 L (3.7 US gal) · ~23.8 km/L → ~333 km (207 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
Both the naked GSX-8S (2023+) and faired GSX-8R (2024+ with Showa SFF-BP forks) use Suzuki’s 776cc twin with identical 3.0 L / 3.5 L oil capacity and Suzuki-pitch spin-on filter (16510-07J00 / HF138).
Oil & Clutch Mechanical Engineering Note
THREAD PITCH WARNING: Suzuki spin-on filters (16510-07J00 / HF138) use an M20×1.0 fine thread—NOT the M20×1.5 thread used on Honda/Yamaha/Kawasaki HF204/HF303 filters! Never cross-fit filters across brands.
Garage Wrenching Gotchas
- Suzuki uniquely specifies equal 250 kPa (36 PSI) front AND 250 kPa (36 PSI) rear cold pressure on the GSX-8S/8R—avoid overinflating the rear to 42 PSI.
- Keep chain slack strictly within 20–30 mm so the standard bi-directional quickshifter cuts cleanly without driveline lash.
5. Frequently Asked Questions (FAQ)
What is the oil capacity of the Suzuki GSX-8R with filter replacement?
Oil drain only takes 3.0 L (3.2 US qt), and oil plus filter replacement takes 3.5 L (3.7 US qt).
Are both front and rear tire pressures 36 PSI on the GSX-8R?
Yes—the official Suzuki manual specifies 250 kPa (36 PSI) front and 250 kPa (36 PSI) rear for both solo and dual riding.
Can I fit an HF204 oil filter onto a Suzuki GSX-8R?
Never! Suzuki uses M20×1.0 threads (HF138 / 16510-07J00), whereas HF204 uses M20×1.5—forcing the wrong filter strips the oil boss and risks catastrophic oil blowout.