Triumph Thruxton 400 / Speed T4 — OEM Fluid, Tire Pressure & Maintenance Specs
398cc Liquid-Cooled Single DOHC 4-Valve TR-Series (Half-Faired Cafe Racer & Torque Variant) · Source: Triumph Thruxton 400 / Speed T4 (2024–Present) Official Owner’s Manual Maintenance Specifications
According to the Triumph Thruxton 400 / Speed T4 (2024–Present) Official Owner’s Manual Maintenance Specifications, the 2024–Present Triumph Thruxton 400 / Speed T4 (chassis TRT4/TR4C) requires 2 L (2.11 US qt) of SAE 10W-50 (JASO MA2, API SN / Full Synthetic 10W-50) engine oil for a drain-only change and 2.15 L (2.27 US qt) with filter service (36TA0055 / HF155). Standard solo cold tire pressure is 228 kPa / 2.28 bar / 33 PSI front (110/70 R17 M/C 54W) and 248 kPa / 2.48 bar / 36 PSI rear (150/60 R17 M/C 66W), paired with 1× Bosch VR5NEU / NGK LKAR8A-9 spark plug(s) and a YTX9-BS / ETZ9-BS battery.
Drain only: 2 L (2.11 US qt)
R 248 kPa (2.48 bar)
Est. Range: ~377 km (234 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-50 · JASO MA2 · API SN / Full Synthetic 10W-50 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 2 L (2.11 US qt) • With filter/strainer: 2.15 L (2.27 US qt) • Complete dry overhaul: 2.3 L (2.43 US qt) |
| OEM Oil Filter Code & Type | 36TA0055 / HF155 |
| 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 | 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: 110/70 R17 M/C 54W · Rear: 150/60 R17 M/C 66W (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 228 kPa / 2.28 bar / 33 PSI Rear: 248 kPa / 2.48 bar / 36 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 228 kPa / 2.28 bar / 33 PSI Rear: 262 kPa / 2.62 bar / 38 PSI |
| OEM Spark Plug & Quantity | Bosch VR5NEU / NGK LKAR8A-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX9-BS / ETZ9-BS (12V 8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/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 | 398 cc · 40 hp @ 8,000 rpm · 37.5 N·m (27.7 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 795 mm (31.3 in) · 176 kg (388 lbs) |
| Fuel Tank & Est. Real-World Range | 13 L (3.4 US gal) · ~29 km/L → ~377 km (234 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 / 32,000 km • Valve Clearance Check: 32,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Expands the 398cc TR platform into the bullet-faired clip-on Thruxton 400 cafe racer and the heavier-flywheel low-RPM Speed T4 roadster.
Oil & Clutch Mechanical Engineering Note
Finned liquid-cooled cylinder head relies on full-synthetic SAE 10W-50 JASO MA2 (2.15 L w/ HF155 cartridge) checked upright through the sight glass.
Garage Wrenching Gotchas
- Verify clip-on brake and clutch lever angles at full steering lock so master cylinders do not contact the bullet fairing stay.
- Wait 3–5 minutes on level ground after warm shutdown before reading the sight glass, preventing oil overfill foaming.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Triumph Thruxton 400 / Speed T4 (2024–Present) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-50 (JASO MA2) at 2 L (2.11 US qt) drain-only and 2.15 L (2.27 US qt) with filter (36TA0055 / HF155).
How do you accurately check the oil level on the Thruxton 400 / Speed T4, and what are its service intervals?
Hold the motorcycle dead-vertical on level ground 2–3 minutes after warm shutdown and verify the oil sits mid-way between the Upper and Lower marks in the crankcase sight glass—never on the sidestand. Torque the drain plug to 25 N·m with a new crush washer. Factory oil change intervals are every 16,000 km, with valve clearance inspection every 32,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Thruxton 400 / Speed T4?
Fitted with 110/70 R17 M/C 54W front and 150/60 R17 M/C 66W rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 33 / 36 PSI (228/248 kPa) solo or 33 / 38 PSI loaded. Seat height is 795 mm (31.3 in) at 176 kg wet weight, delivering ~377 km per 13 L tank.