Honda Zoomer 50 FI / Ruckus (AF58) — OEM Fluid, Tire Pressure & Maintenance Specs
49cc Liquid-Cooled Single SOHC 2V GET2 (Dry Centrifugal CVT) · Source: Honda Zoomer 50 FI / Ruckus (AF58) (2001–2017) Official Owner’s Manual Maintenance Specifications
According to the Honda Zoomer 50 FI / Ruckus (AF58) (2001–2017) Official Owner’s Manual Maintenance Specifications, the 2001–2017 Honda Zoomer 50 FI / Ruckus (AF58) (chassis AF58/NPS50) requires 0.6 L (0.63 US qt) of SAE 10W-30 (JASO MB, API SJ or higher) engine oil for a drain-only change and 0.6 L (0.63 US qt) with filter service (15421-KPL-900 (Oil Strainer Screen)). Standard solo cold tire pressure is 125 kPa / 1.25 bar / 18 PSI front (120/90-10 57J) and 125 kPa / 1.25 bar / 18 PSI rear (130/90-10 61J), paired with 1× NGK ER8EH-N spark plug(s) and a YTZ7S battery.
Drain only: 0.6 L (0.63 US qt)
R 125 kPa (1.25 bar)
Est. Range: ~275 km (171 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-30 (Alt: SAE 10W-40) · JASO MB · 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: 0.7 L (0.74 US qt) |
| OEM Oil Filter Code & Type | 15421-KPL-900 (Oil Strainer Screen) |
| 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 |
| Final Drive / Bevel Gear Oil | 90 ml (0.09 L) — SAE 10W-30 JASO MB (90 ml final gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/90-10 57J · Rear: 130/90-10 61J (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 125 kPa / 1.25 bar / 18 PSI Rear: 125 kPa / 1.25 bar / 18 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 125 kPa / 1.25 bar / 18 PSI Rear: 175 kPa / 1.75 bar / 25 PSI |
| OEM Spark Plug & Quantity | NGK ER8EH-N × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ7S (12V 6.0Ah MF AGM) |
| Final Drive Maintenance | Dry V-Belt CVT Drive — Inspect/replace V-belt and rollers every 20,000–24,000 km |
| Brake Fluid & Coolant | Mechanical Drum · Silicate-free ethylene-glycol OAT coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 49 cc · 4.3 hp @ 8,500 rpm · 4 N·m (3.0 lb-ft) @ 5,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 735 mm (28.9 in) · 88 kg (194 lbs) |
| Fuel Tank & Est. Real-World Range | 5 L (1.3 US gal) · ~55 km/L → ~275 km (171 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: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Despite being 49cc, the naked-frame AF58 Zoomer/Ruckus uses a liquid-cooled 4-stroke engine; Japan-market models gained PGM-FI fuel injection from late 2007 while US Ruckus stayed carbureted.
Oil & Clutch Mechanical Engineering Note
Because 49cc scooters spend most of their life at wide-open throttle on a tiny 0.60 L sump, measure SAE 10W-30 JASO MB oil precisely and change every 2,000 km.
Garage Wrenching Gotchas
- Uses an ultra-slender 8mm-thread NGK ER8EH-N spark plug—tighten delicately by hand and quarter-turn only, as over-torquing strips the miniature cylinder head threads.
- Fat 10-inch balloon tires act as part of the suspension at 125 kPa (18 PSI) solo—inflating to 30+ PSI ruins wet grip and ride compliance.
5. Frequently Asked Questions (FAQ)
What are the engine oil and rear hub gear oil capacities for the Honda Zoomer 50 FI / Ruckus (AF58) scooter?
With an isolated dry CVT belt case, the engine requires 0.6 L drain-only or 0.6 L (0.63 US qt) with filter/screen (15421-KPL-900 (Oil Strainer Screen)) of SAE 10W-30 (JASO MB). Service the rear reduction hub separately (final drive 90 ml).
How do you accurately check the oil level on the Zoomer 50 FI / Ruckus (AF58), 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 24 N·m with a new crush washer. Factory oil change intervals are every 6,000 km, with valve clearance inspection every 12,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Zoomer 50 FI / Ruckus (AF58)?
Fitted with 120/90-10 57J front and 130/90-10 61J rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 18 / 18 PSI (125/125 kPa) solo or 18 / 25 PSI loaded. Seat height is 735 mm (28.9 in) at 88 kg wet weight, delivering ~275 km per 5 L tank.