Honda Super Cub C125 (JA58 / JA71) — OEM Fluid, Tire Pressure & Maintenance Specs
124cc Air-Cooled Single-Cylinder SOHC Heritage Cub (Smart Key + Wet Centrifugal 4-Speed) · Source: Honda Super Cub C125 (JA58) Official Owner’s Manual Specifications
According to the Honda Super Cub C125 (JA58) Official Owner’s Manual Specifications, the 2022–Present Honda Super Cub C125 (JA58 / JA71) (chassis JA58/JA71) requires 0.8 L (0.85 US qt) of SAE 10W-30 (JASO MA, API SJ or higher) engine oil for a drain-only change and 0.85 L (0.90 US qt) with filter service (15412-MGS-D21 / HF117). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (70/90-17 M/C 38P) and 225 kPa / 2.25 bar / 33 PSI rear (80/90-17 M/C 50P), paired with 1× NGK CPR7EA-9S spark plug(s) and a YTZ5S battery.
Drain only: 0.8 L (0.85 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~244 km (152 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Centrifugal Semi-Auto 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: 0.8 L (0.85 US qt) • With filter/strainer: 0.85 L (0.90 US qt) • Complete dry overhaul: 1 L (1.06 US qt) |
| OEM Oil Filter Code & Type | 15412-MGS-D21 / HF117 |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 24 N·m (17.7 lb-ft / 2.45 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 70/90-17 M/C 38P · Rear: 80/90-17 M/C 50P (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: 280 kPa / 2.80 bar / 41 PSI |
| OEM Spark Plug & Quantity | NGK CPR7EA-9S × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ5S (12V 3.5Ah MF AGM) |
| Final Drive Maintenance | 420 Chain inside full steel chaincase — Slack 25–35 mm |
| Brake Fluid & Coolant | DOT 4 · Air-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 124 cc · 9.8 hp @ 7,500 rpm · 10.4 N·m (7.7 lb-ft) @ 6,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 780 mm (30.7 in) · 110 kg (243 lbs) |
| Fuel Tank & Est. Real-World Range | 3.7 L (1.0 US gal) · ~66 km/L → ~244 km (152 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 12,000 km • Air Filter / Spark Plug: 18,000 km / 12,000 km • Valve Clearance Check: 6,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
2022+ Euro 5 (JA58) models gained a replaceable paper oil filter element (15412-MGS-D21) and NGK CPR7EA-9S plug, whereas 2018–2021 JA48 models had no cartridge filter.
Oil & Clutch Mechanical Engineering Note
Always fill with SAE 10W-30 JASO MA motorcycle oil (0.85 L with paper filter)—never JASO MB scooter oil.
Garage Wrenching Gotchas
- Despite sipping ~66 km/L, the compact 3.7 L under-seat tank means planning fuel stops around every 200 km on country rides.
- Deactivate the Smart Key fob (hold key button until LED flashes red) when parking near the bike or during winter storage so the tiny 3.5Ah YTZ5S battery doesn’t drain.
5. Frequently Asked Questions (FAQ)
How much oil does the Honda Super Cub C125 take?
Drain-only refill is 0.80 L (0.85 US qt), and oil with paper filter change is 0.85 L (0.90 US qt).
What is the cold tire pressure for the Super Cub C125?
Set 200 kPa (29 PSI) front and 225 kPa (33 PSI) rear solo, or 280 kPa (41 PSI) rear with a passenger.
Where is the battery located on the Super Cub C125?
The YTZ5S battery sits behind the right-side center body panel.