Triumph Speed Triple 955i (T509 / 955) — OEM Fluid, Tire Pressure & Maintenance Specs
955cc Liquid-Cooled Inline-3 DOHC (Original Twin Chrome Bug-Eye Factory Streetfighter) · Source: Triumph Speed Triple 955i (T509 / 955) (1997–2004) Official Owner’s Manual Maintenance Specifications
According to the Triumph Speed Triple 955i (T509 / 955) (1997–2004) Official Owner’s Manual Maintenance Specifications, the 1997–2004 Triumph Speed Triple 955i (T509 / 955) (chassis T509/595RPT) requires 3.2 L (3.38 US qt) of SAE 10W-40 (JASO MA2, API SH or higher (Castrol Power 1 Racing)) engine oil for a drain-only change and 3.5 L (3.70 US qt) with filter service (T1218001 / HF204). Standard solo cold tire pressure is 234 kPa / 2.34 bar / 34 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 3× NGK CR9EK spark plug(s) and a YTX14-BS battery.
Drain only: 3.2 L (3.38 US qt)
R 290 kPa (2.90 bar)
Est. Range: ~353 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 SH or higher (Castrol Power 1 Racing) |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 3.2 L (3.38 US qt) • With filter/strainer: 3.5 L (3.70 US qt) • Complete dry overhaul: 4 L (4.23 US qt) |
| OEM Oil Filter Code & Type | T1218001 / HF204 |
| Correct Oil Level Check Method | Upright on level ground; screw dipstick ALL THE WAY IN, then remove to read level |
| Oil Drain Bolt Torque | 25 N·m (18.4 lb-ft / 2.55 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: 234 kPa / 2.34 bar / 34 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 248 kPa / 2.48 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | NGK CR9EK × 3 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX14-BS (12V 12.0Ah Sealed AGM) |
| Final Drive Maintenance | 525 Heavy-Duty X-Ring Chain — Maintain 25–35 mm slack and lubricate regularly |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 955 cc · 120 hp @ 9,100 rpm · 100 N·m (73.8 lb-ft) @ 5,100 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 815 mm (32.1 in) · 215 kg (474 lbs) |
| Fuel Tank & Est. Real-World Range | 21 L (5.5 US gal) · ~16.8 km/L → ~353 km (219 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 16,000 km / 16,000 km • Air Filter / Spark Plug: 16,000 km / 20,000 km • Valve Clearance Check: 20,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Defined the factory streetfighter silhouette with twin chrome headlights and single-sided swingarm (885cc T509 in 1997–1998, 955cc 955i from 1999–2004).
Oil & Clutch Mechanical Engineering Note
Keep the YTX14-BS battery healthy to protect the early starter sprag clutch, and service the 955cc sump with 3.5 L of SAE 10W-40 or 15W-50 JASO MA2.