Yamaha FreeGo 125 (Smart Motor Generator) — OEM Fluid, Tire Pressure & Maintenance Specs
125cc Forced Air-Cooled Single SOHC 2-Valve Blue Core SMG · Source: Yamaha FreeGo 125 (Smart Motor Generator) (2019–Present) Official Owner’s Manual Maintenance Specifications
According to the Yamaha FreeGo 125 (Smart Motor Generator) (2019–Present) Official Owner’s Manual Maintenance Specifications, the 2019–Present Yamaha FreeGo 125 (Smart Motor Generator) (chassis B5D/BKU) 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 (100/90-12M/C 59J) and 200 kPa / 2.00 bar / 29 PSI rear (110/90-12M/C 64L), 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: ~202 km (126 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: 100/90-12M/C 59J · Rear: 110/90-12M/C 64L (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 | DOT 4 · Forced Air-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 9.5 hp @ 8,000 rpm · 9.5 N·m (7.0 lb-ft) @ 5,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 780 mm (30.7 in) · 102 kg (225 lbs) |
| Fuel Tank & Est. Real-World Range | 4.2 L (1.1 US gal) · ~48 km/L → ~202 km (126 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
Combining an under-floor 4.2 L fuel tank and front external filler with a 25 L trunk, the B5D FreeGo received sharper LED bodywork on 2023+ Connected (BKU) models.
Oil & Clutch Mechanical Engineering Note
Refill exactly 0.80 L of SAE 10W-40 JASO MB oil on routine drains—pouring 800 ml into the sump leaves enough in a 1 L bottle to service the 100 ml final gear case.