Honda CB750 Hornet (RH12) — OEM Fluid, Tire Pressure & Maintenance Specs
755cc Liquid-Cooled Parallel-Twin Unicam 8V 270° · Source: Honda CB750 Hornet (RH12) (2023–Present) Official Owner’s Manual Maintenance Specifications
According to the Honda CB750 Hornet (RH12) (2023–Present) Official Owner’s Manual Maintenance Specifications, the 2023–Present Honda CB750 Hornet (RH12) (chassis RH12) requires 3.4 L (3.59 US qt) of SAE 10W-30 (JASO MA, API SJ or higher) engine oil for a drain-only change and 3.6 L (3.80 US qt) with filter service (15410-MCJ-000 / HF204). Standard solo cold tire pressure is 250 kPa / 2.50 bar / 36 PSI front (120/70ZR17 M/C (58W)) and 290 kPa / 2.90 bar / 42 PSI rear (160/60ZR17 M/C (69W)), paired with 2× NGK SILMAR8A9S spark plug(s) and a YTZ10S battery.
Drain only: 3.4 L (3.59 US qt)
R 290 kPa (2.90 bar)
Est. Range: ~350 km (217 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: 3.4 L (3.59 US qt) • With filter/strainer: 3.6 L (3.80 US qt) • Complete dry overhaul: 4 L (4.23 US qt) |
| OEM Oil Filter Code & Type | 15410-MCJ-000 / HF204 |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| 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: 120/70ZR17 M/C (58W) · Rear: 160/60ZR17 M/C (69W) (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 250 kPa / 2.50 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | NGK SILMAR8A9S × 2 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ10S (12V 8.6Ah 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 | 755 cc · 91.8 hp @ 9,500 rpm · 75 N·m (55.3 lb-ft) @ 7,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 795 mm (31.3 in) · 190 kg (419 lbs) |
| Fuel Tank & Est. Real-World Range | 15.2 L (4.0 US gal) · ~23 km/L → ~350 km (217 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 12,000 km / 24,000 km • Air Filter / Spark Plug: 18,000 km / 48,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
All-new 755cc 270-degree Unicam parallel-twin streetfighter launched in 2023 at just 190 kg wet with Showa SFF-BP forks and TBW riding modes; restyled for 2025 with dual-projector LED optics.
Oil & Clutch Mechanical Engineering Note
Featuring Ni-SiC plated cylinders and a compact Unicam head, fill 3.6 L of SAE 10W-30 JASO MA oil when replacing spin-on filter HF204 and check via the unscrewed dipstick.
Garage Wrenching Gotchas
- Honda intentionally pairs its 4.5-inch rear rim with a nimble 160/60ZR17 tire—squeezing a 180-section tire onto the stock rim pinches the profile and slows turn-in.
- Inside the Unicam cylinder head, intake valves use shims under buckets while exhaust valves use rocker-arm screw adjusters—prepare both tools at the 24,000 km valve check.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Honda CB750 Hornet (RH12) (2023–Present) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-30 (JASO MA) at 3.4 L (3.59 US qt) drain-only and 3.6 L (3.80 US qt) with filter (15410-MCJ-000 / HF204).
How do you accurately check the oil level on the CB750 Hornet (RH12), and what are its service intervals?
Hold the bike upright on level ground 2–3 minutes after shutdown, wipe the dipstick, and rest it on the filler threads without screwing it in (threading it in reads artificially high and risks oil starvation). Torque the drain plug to 30 N·m with a new crush washer. Factory oil change intervals are every 12,000 km, with valve clearance inspection every 24,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the CB750 Hornet (RH12)?
Fitted with 120/70ZR17 M/C (58W) front and 160/60ZR17 M/C (69W) rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 36 / 42 PSI (250/290 kPa) solo or 36 / 42 PSI loaded. Seat height is 795 mm (31.3 in) at 190 kg wet weight, delivering ~350 km per 15.2 L tank.