Triumph TF 250-X (Motocross) — OEM Fluid, Tire Pressure & Maintenance Specs
249.9cc Liquid-Cooled Single DOHC Titanium-Valve MX 4T (Aluminum Spine Frame & KYB) · Source: Triumph TF 250-X (Motocross) (2024–Present) Official Owner’s Manual Maintenance Specifications
According to the Triumph TF 250-X (Motocross) (2024–Present) Official Owner’s Manual Maintenance Specifications, the 2024–Present Triumph TF 250-X (Motocross) (chassis TF25X) requires 0.85 L (0.90 US qt) of SAE 10W-50 (JASO MA2, API SN / Full Synthetic 10W-50) engine oil for a drain-only change and 0.95 L (1.00 US qt) with filter service (36TA0055 / HF155). Standard solo cold tire pressure is 100 kPa / 1.00 bar / 15 PSI front (80/100 - 21 51M) and 100 kPa / 1.00 bar / 15 PSI rear (100/90 - 19 57M), paired with 1× NGK LM9EZ-N spark plug(s) and a LiFePO4 MX Racing Pack battery.
Drain only: 0.85 L (0.90 US qt)
R 100 kPa (1.00 bar)
Est. Range: ~126 km (78 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: 0.85 L (0.90 US qt) • With filter/strainer: 0.95 L (1.00 US qt) • Complete dry overhaul: 1.05 L (1.11 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 | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 80/100 - 21 51M · Rear: 100/90 - 19 57M (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 100 kPa / 1.00 bar / 15 PSI Rear: 100 kPa / 1.00 bar / 15 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 105 kPa / 1.05 bar / 15 PSI Rear: 105 kPa / 1.05 bar / 15 PSI |
| OEM Spark Plug & Quantity | NGK LM9EZ-N × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | LiFePO4 MX Racing Pack (12V Ultralight Lithium Starter Battery) |
| 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 | 249.9 cc · 47.3 hp @ 13,500 rpm · 28.3 N·m (20.9 lb-ft) @ 9,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 960 mm (37.8 in) · 104 kg (229 lbs) |
| Fuel Tank & Est. Real-World Range | 7 L (1.8 US gal) · ~18 km/L → ~126 km (78 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 150 km • Engine Oil / Filter: 500 km / 500 km • Air Filter / Spark Plug: 250 km / 1,500 km • Valve Clearance Check: 1,500 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Triumph’s clean-sheet 2024 4-stroke motocross racer co-developed with Ricky Carmichael, packing Del West titanium valves, Brembo hydraulics, and KYB AOS suspension.
Oil & Clutch Mechanical Engineering Note
High-strung 13,500 rpm competition sump holds just 0.95 L with filter—replace full-synthetic SAE 10W-50 JASO MA2 strictly by engine-hour meter.