Honda Lead 125 (JK12 eSP+) — OEM Fluid, Tire Pressure & Maintenance Specs
124cc Liquid-Cooled Single SOHC 4V eSP+ (Dry Centrifugal CVT) · Source: Honda Lead 125 (JK12 eSP+) (2022–Present) Official Owner’s Manual Maintenance Specifications
According to the Honda Lead 125 (JK12 eSP+) (2022–Present) Official Owner’s Manual Maintenance Specifications, the 2022–Present Honda Lead 125 (JK12 eSP+) (chassis JK12) requires 0.8 L (0.85 US qt) of SAE 10W-30 (JASO MB, API SJ or higher) engine oil for a drain-only change and 0.8 L (0.85 US qt) with filter service (15421-KPL-900 (Oil Strainer Screen)). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (90/90-12 44J) and 225 kPa / 2.25 bar / 33 PSI rear (100/90-10 56J), paired with 1× NGK LMAR8L-9 spark plug(s) and a YTZ7S / YTX7L-BS battery.
Drain only: 0.8 L (0.85 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~294 km (183 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: 0.8 L (0.85 US qt) • With filter/strainer: 0.8 L (0.85 US qt) • Complete dry overhaul: 0.9 L (0.95 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 | 120 ml (0.12 L) — SAE 10W-30 JASO MB (120 ml final reduction gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-12 44J · Rear: 100/90-10 56J (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 175 kPa / 1.75 bar / 25 PSI Rear: 225 kPa / 2.25 bar / 33 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 LMAR8L-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ7S / YTX7L-BS (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 | 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 | 124 cc · 11.3 hp @ 8,750 rpm · 12 N·m (8.9 lb-ft) @ 5,250 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 760 mm (29.9 in) · 116 kg (256 lbs) |
| Fuel Tank & Est. Real-World Range | 6 L (1.6 US gal) · ~49 km/L → ~294 km (183 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
Upgraded in 2022 (chassis JK12) from the 2-valve JF45 motor to the 4-valve liquid-cooled eSP+ engine with Smart Key, switching spark plugs to long-reach NGK LMAR8L-9.
Oil & Clutch Mechanical Engineering Note
Equipped with a piston cooling oil jet inside its 4-valve eSP+ crankcase, the JK12 Lead 125 demands clean SAE 10W-30 JASO MB oil at 0.80 L and periodic strainer cleaning.
Garage Wrenching Gotchas
- Lifting the cavernous 37 L underseat tub is required to access the throttle body and LMAR8L-9 plug; mark bolt lengths and unhook the seat latch cable carefully.
- Because CBS links the front disc caliper with a 10-inch rear drum, neglecting rear shoe free-play adjustment makes the left brake lever feel spongy.
5. Frequently Asked Questions (FAQ)
What are the engine oil and rear hub gear oil capacities for the Honda Lead 125 (JK12 eSP+) scooter?
With an isolated dry CVT belt case, the engine requires 0.8 L drain-only or 0.8 L (0.85 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 120 ml).
How do you accurately check the oil level on the Lead 125 (JK12 eSP+), 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 Lead 125 (JK12 eSP+)?
Fitted with 90/90-12 44J front and 100/90-10 56J rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 25 / 33 PSI (175/225 kPa) solo or 25 / 33 PSI loaded. Seat height is 760 mm (29.9 in) at 116 kg wet weight, delivering ~294 km per 6 L tank.