Honda CRF450RL (MD45) — OEM Fluid, Tire Pressure & Maintenance Specs
449cc Liquid-Cooled Single Unicam 4V Dual-Sport · Source: Honda CRF450RL (MD45) (2019–Present) Official Owner’s Manual Maintenance Specifications
According to the Honda CRF450RL (MD45) (2019–Present) Official Owner’s Manual Maintenance Specifications, the 2019–Present Honda CRF450RL (MD45) (chassis MD45) requires 1.15 L (1.22 US qt) of SAE 10W-30 (JASO MA, API SJ or higher) engine oil for a drain-only change and 1.2 L (1.27 US qt) with filter service (15412-MEN-671 / HF116). Standard solo cold tire pressure is 150 kPa / 1.50 bar / 22 PSI front (80/100-21 51M) and 150 kPa / 1.50 bar / 22 PSI rear (120/80-18 62M), paired with 1× NGK SILMAR8C9 spark plug(s) and a HY85S LiFePO4 battery.
Drain only: 1.15 L (1.22 US qt)
R 150 kPa (1.50 bar)
Est. Range: ~167 km (104 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: 1.15 L (1.22 US qt) • With filter/strainer: 1.2 L (1.27 US qt) • Complete dry overhaul: 1.35 L (1.43 US qt) |
| OEM Oil Filter Code & Type | 15412-MEN-671 / HF116 |
| 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 | 16 N·m (11.8 lb-ft / 1.63 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 80/100-21 51M · Rear: 120/80-18 62M (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 150 kPa / 1.50 bar / 22 PSI Rear: 150 kPa / 1.50 bar / 22 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 150 kPa / 1.50 bar / 22 PSI Rear: 150 kPa / 1.50 bar / 22 PSI |
| OEM Spark Plug & Quantity | NGK SILMAR8C9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | HY85S LiFePO4 (12V 11.2Ah AGM / LiFePO4) |
| Final Drive Maintenance | 520 Sealed Enduro Chain — Clean and lube after off-road rides |
| 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 | 449 cc · 38 hp @ 8,000 rpm · 36 N·m (26.6 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 940 mm (37.0 in) · 131 kg (289 lbs) |
| Fuel Tank & Est. Real-World Range | 7.6 L (2.0 US gal) · ~22 km/L → ~167 km (104 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 500 km • Engine Oil / Filter: 1,000 km / 1,000 km • Air Filter / Spark Plug: 2,000 km / 16,000 km • Valve Clearance Check: 3,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Street-legal evolution of the CRF450R motocrosser with a wide-ratio 6-speed and titanium tank—strictly requires 1,000 km oil/filter changes (1.20 L w/ HF116).
Oil & Clutch Mechanical Engineering Note
Honda 998/1,084cc semi-dry-sump Unicam twin (Africa Twin, NT1100, Rebel 1100) featuring dual crankcase drain bolts and 4 twin-spark plugs.