Yamaha Majesty 250 (SG20J 4D9 YCC-AT) — OEM Fluid, Tire Pressure & Maintenance Specs
249cc Liquid-Cooled Single SOHC 4-Valve FI (YCC-AT Electronically Controlled CVT) · Source: Yamaha Majesty 250 (SG20J 4D9 YCC-AT) (2007–2017) Official Owner’s Manual Maintenance Specifications
According to the Yamaha Majesty 250 (SG20J 4D9 YCC-AT) (2007–2017) Official Owner’s Manual Maintenance Specifications, the 2007–2017 Yamaha Majesty 250 (SG20J 4D9 YCC-AT) (chassis SG20J/4D9) requires 1.3 L (1.37 US qt) of SAE 10W-40 (JASO MB, API SG or higher) engine oil for a drain-only change and 1.4 L (1.48 US qt) with filter service (4HC-15351-00 (Strainer Screen)). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (110/90-12 64L) and 225 kPa / 2.25 bar / 33 PSI rear (130/70-12 62L), paired with 1× NGK DR8EA spark plug(s) and a YT9B-BS battery.
Drain only: 1.3 L (1.37 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~348 km (216 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 · JASO MB · API SG or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.3 L (1.37 US qt) • With filter/strainer: 1.4 L (1.48 US qt) • Complete dry overhaul: 1.6 L (1.69 US qt) |
| OEM Oil Filter Code & Type | 4HC-15351-00 (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 | 250 ml (0.25 L) — SAE 10W-30 / 10W-40 (250 ml rear gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/90-12 64L · Rear: 130/70-12 62L (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: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK DR8EA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YT9B-BS (12V 8.0Ah 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 | 249 cc · 19 hp @ 6,500 rpm · 22 N·m (16.2 lb-ft) @ 5,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 700 mm (27.6 in) · 188 kg (414 lbs) |
| Fuel Tank & Est. Real-World Range | 12 L (3.2 US gal) · ~29 km/L → ~348 km (216 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 5,000 km / 10,000 km • Air Filter / Spark Plug: 15,000 km / 15,000 km • Valve Clearance Check: 20,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Succeeding the carbureted SG03J Majesty C in 2007, the SG20J (4D9) introduced gull-wing 60 L underseat doors, YCC-AT electronic pulley control, and a low 700 mm seat.
Oil & Clutch Mechanical Engineering Note
Using a servo-actuated dry variator isolated from the engine sump, refill 1.3–1.4 L of SAE 10W-40 JASO MB oil (clean strainer screen) plus 250 ml rear gear oil.