Yamaha Jog 125 (SEJ5J Blue Core) — OEM Fluid, Tire Pressure & Maintenance Specs
124cc Forced Air-Cooled Single SOHC 2-Valve Blue Core (95kg Commuter) · Source: Yamaha Jog 125 (SEJ5J Blue Core) (2022–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha Jog 125 (SEJ5J Blue Core) (2022–Present) Official Owner’s Manual Maintenance Specifications, the 2022–Present Yamaha Jog 125 (SEJ5J Blue Core) (chassis SEJ5J/B8F) requires 0.8 L (0.85 US qt) of SAE 10W-40 (JASO MB, API SG or higher) engine oil for a drain-only change and 0.8 L (0.85 US qt) with filter service (B65-E3411-00 (Oil Strainer Screen)). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (90/90-10 50J) and 200 kPa / 2.00 bar / 29 PSI rear (90/90-10 50J), paired with 1× NGK CR6HSA spark plug(s) and a YTZ7V / YTZ6V battery.
Drain only: 0.8 L (0.85 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~208 km (129 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 10W-30) · JASO MB · API SG 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: 0.84 L (0.89 US qt) |
| OEM Oil Filter Code & Type | B65-E3411-00 (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 | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 100 ml (0.10 L) — SAE 10W-40 JASO MB (100 ml rear gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-10 50J · Rear: 90/90-10 50J (Tubeless) |
|---|---|
| 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 CR6HSA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ7V / YTZ6V (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 · Forced Air-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 124 cc · 8.3 hp @ 7,000 rpm · 9.8 N·m (7.2 lb-ft) @ 5,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 735 mm (28.9 in) · 95 kg (209 lbs) |
| Fuel Tank & Est. Real-World Range | 4 L (1.1 US gal) · ~51.9 km/L → ~208 km (129 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 4,000 km / 8,000 km • Air Filter / Spark Plug: 12,000 km / 8,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Launched in 2022 as Yamaha’s lightest 125cc commuter (95 kg, 735 mm seat), the SEJ5J Jog 125 uses cable-operated front and rear unified drum brakes with zero brake fluid.
Oil & Clutch Mechanical Engineering Note
Sharing the Axis Z’s 124cc air-cooled Blue Core dry-CVT engine, maintenance requires just 0.80 L of SAE 10W-40 JASO MB engine oil and 100 ml of rear gear oil.