Honda Super Cub 90 Custom / Deluxe (HA02) — OEM Fluid, Tire Pressure & Maintenance Specs
85cc Air-Cooled Horizontal Single SOHC 2V 3-Speed + Leading-Link Fork · Source: Honda Super Cub 90 Custom / Deluxe (HA02) (1980–2008) Official Owner’s Manual Maintenance Specifications
According to the Honda Super Cub 90 Custom / Deluxe (HA02) (1980–2008) Official Owner’s Manual Maintenance Specifications, the 1980–2008 Honda Super Cub 90 Custom / Deluxe (HA02) (chassis HA02) requires 0.6 L (0.63 US qt) of SAE 10W-30 (JASO MA, API SJ or higher) engine oil for a drain-only change and 0.6 L (0.63 US qt) with filter service (15421-035-010 (Screen + Centrifugal Spinner)). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (2.50-17 38L) and 200 kPa / 2.00 bar / 29 PSI rear (2.50-17 43L), paired with 1× NGK C6HSA spark plug(s) and a YTZ5S / YTX4L-BS battery.
Drain only: 0.6 L (0.63 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~240 km (149 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: 0.6 L (0.63 US qt) • With filter/strainer: 0.6 L (0.63 US qt) • Complete dry overhaul: 0.8 L (0.85 US qt) |
| OEM Oil Filter Code & Type | 15421-035-010 (Screen + Centrifugal Spinner) |
| 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: 2.50-17 38L · Rear: 2.50-17 43L (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK C6HSA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ5S / YTX4L-BS (12V 3.5Ah MF AGM) |
| Final Drive Maintenance | 428 Drive Chain — Maintain 20–30 mm slack and lubricate regularly |
| Brake Fluid & Coolant | Mechanical Drum · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 85 cc · 7 hp @ 7,000 rpm · 7.7 N·m (5.7 lb-ft) @ 5,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 735 mm (28.9 in) · 86 kg (190 lbs) |
| Fuel Tank & Est. Real-World Range | 4 L (1.1 US gal) · ~60 km/L → ~240 km (149 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 12,000 km • Air Filter / Spark Plug: 16,000 km / 12,000 km • Valve Clearance Check: 8,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Classic pressed-steel HA02 Cub featuring leading-link front suspension, a 3-speed rotary gearbox, carburetor, and a screen-only 0.60 L crankcase.
Oil & Clutch Mechanical Engineering Note
Honda horizontal underbone with wet centrifugal semi-auto 4-speed clutch—strictly requires JASO MA oil (never JASO MB scooter oil).