Honda CBR250RR (MC51) — OEM Fluid, Tire Pressure & Maintenance Specs
249cc Liquid-Cooled Parallel-Twin DOHC 8V Throttle-By-Wire · Source: Honda CBR250RR (MC51) (2017–Present) Official Owner’s Manual Maintenance Specifications
According to the Honda CBR250RR (MC51) (2017–Present) Official Owner’s Manual Maintenance Specifications, the 2017–Present Honda CBR250RR (MC51) (chassis MC51) requires 1.9 L (2.01 US qt) of SAE 10W-30 (JASO MA, API SJ or higher) engine oil for a drain-only change and 2.1 L (2.22 US qt) with filter service (15410-MCJ-000 / HF204). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (110/70R17 M/C 54H) and 225 kPa / 2.25 bar / 33 PSI rear (140/70R17 M/C 66H), paired with 2× NGK SILMAR9C9 spark plug(s) and a YTZ8V battery.
Drain only: 1.9 L (2.01 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~384 km (239 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-30 (Alt: SAE 10W-40) · JASO MA · API SJ or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.9 L (2.01 US qt) • With filter/strainer: 2.1 L (2.22 US qt) • Complete dry overhaul: 2.4 L (2.54 US qt) |
| OEM Oil Filter Code & Type | 15410-MCJ-000 / HF204 |
| 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 | 30 N·m (22.1 lb-ft / 3.06 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/70R17 M/C 54H · Rear: 140/70R17 M/C 66H (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK SILMAR9C9 × 2 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ8V (12V 7.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed O/X-Ring Chain — Maintain 25–35 mm slack and lube every 800–1,000 km |
| Brake Fluid & Coolant | DOT 4 · Silicate-free ethylene-glycol OAT coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 249 cc · 41 hp @ 13,000 rpm · 25 N·m (18.4 lb-ft) @ 11,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 790 mm (31.1 in) · 168 kg (370 lbs) |
| Fuel Tank & Est. Real-World Range | 14.5 L (3.8 US gal) · ~26.5 km/L → ~384 km (239 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 10,000 km / 10,000 km • Air Filter / Spark Plug: 18,000 km / 24,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Unrelated to the 1990s inline-four MC22, the 2017+ MC51 parallel-twin gained 41 hp pistons and a slipper clutch in 2020, followed by Showa SFF-BP forks and HSTC in 2023.
Oil & Clutch Mechanical Engineering Note
Spinning to a 14,000 rpm redline, the MC51 twin benefits from ester-grade SAE 10W-30 or track SAE 10W-40 JASO MA2 synthetic oil at 2.1 L with spin-on filter HF204.
Garage Wrenching Gotchas
- Its steep downdraft airbox sits right under the front tank cover—inspect the viscous paper element early if ridden hard on dusty canyon or track days.
- Optional OEM bidirectional quickshifters become balky above 11,000 rpm whenever 520 chain slack drifts past 35 mm or shift-rod heim joints bind.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Honda CBR250RR (MC51) (2017–Present) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-30 (JASO MA) at 1.9 L (2.01 US qt) drain-only and 2.1 L (2.22 US qt) with filter (15410-MCJ-000 / HF204).
How do you accurately check the oil level on the CBR250RR (MC51), 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 30 N·m with a new crush washer. Factory oil change intervals are every 10,000 km, with valve clearance inspection every 24,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the CBR250RR (MC51)?
Fitted with 110/70R17 M/C 54H front and 140/70R17 M/C 66H rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 29 / 33 PSI (200/225 kPa) solo or 29 / 33 PSI loaded. Seat height is 790 mm (31.1 in) at 168 kg wet weight, delivering ~384 km per 14.5 L tank.