Suzuki Nex 125 (GSR125 NEX) — OEM Fluid, Tire Pressure & Maintenance Specs
124cc Air-Cooled Single SOHC 2-Valve FI (32L Underseat Urban Scooter) · Source: Suzuki Nex 125 (GSR125 NEX) (2011–2023) Official Owner’s Manual Maintenance Specifications
According to the Suzuki Nex 125 (GSR125 NEX) (2011–2023) Official Owner’s Manual Maintenance Specifications, the 2011–2023 Suzuki Nex 125 (GSR125 NEX) (chassis UT125X/UZ125X) requires 0.9 L (0.95 US qt) of SAE 10W-40 (JASO MB, API SJ/SL) engine oil for a drain-only change and 0.95 L (1.00 US qt) with filter service (16510-05240 / HF132). Standard solo cold tire pressure is 175 kPa / 1.75 bar / 25 PSI front (100/90-10 56J) and 200 kPa / 2.00 bar / 29 PSI rear (100/90-10 56J), paired with 1× NGK MR8E-9 / CR6HSA spark plug(s) and a YTX7A-BS / FTZ6V battery.
Drain only: 0.9 L (0.95 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~270 km (168 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 SJ/SL |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.9 L (0.95 US qt) • With filter/strainer: 0.95 L (1.00 US qt) • Complete dry overhaul: 1.05 L (1.11 US qt) |
| OEM Oil Filter Code & Type | 16510-05240 / HF132 |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 18 N·m (13.3 lb-ft / 1.84 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 100 ml (0.10 L) — SAE 10W-40 (100 ml rear reduction gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 100/90-10 56J · Rear: 100/90-10 56J (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 MR8E-9 / CR6HSA × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX7A-BS / FTZ6V (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 · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 124 cc · 9.4 hp @ 7,000 rpm · 10 N·m (7.4 lb-ft) @ 6,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 750 mm (29.5 in) · 112 kg (247 lbs) |
| Fuel Tank & Est. Real-World Range | 6 L (1.6 US gal) · ~45 km/L → ~270 km (168 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
Popular Taiwan/Korea-market commuter pairing the V125-family engine and paper oil filter HF132 with a cavernous 32 L helmet bay.
Oil & Clutch Mechanical Engineering Note
Suzuki SEP air-cooled 125cc dry-CVT scooter platform (Address, Avenis, Burgman 125, Swish) holding ~0.7 L of SAE 10W-40 JASO MB oil.