SYM Cruisym 125 (Cruisym α 125) — OEM Fluid, Tire Pressure & Maintenance Specs
124.9cc Liquid-Cooled Single SOHC 4-Valve with Bosch ABS & TCS · Source: SYM Cruisym 125 (Cruisym α 125) (2018–Present) Official Owner’s Manual Maintenance Specifications
According to the SYM Cruisym 125 (Cruisym α 125) (2018–Present) Official Owner’s Manual Maintenance Specifications, the 2018–Present SYM Cruisym 125 (Cruisym α 125) (chassis LN12W8/LX12W) requires 0.85 L (0.90 US qt) of SAE 10W-40 (JASO MB, API SJ/SL Synthetic Blend 10W-40) engine oil for a drain-only change and 1 L (1.06 US qt) with filter service (15421-GY6-900 (Strainer Screen & O-Ring)). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (120/70-14 55P) and 225 kPa / 2.25 bar / 33 PSI rear (140/60-13 63P), paired with 1× NGK CPR8EA-9 / CR8E spark plug(s) and a YTX9-BS / YTX12-BS battery.
Drain only: 0.85 L (0.90 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~408 km (254 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 · JASO MB · API SJ/SL Synthetic Blend 10W-40 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.85 L (0.90 US qt) • With filter/strainer: 1 L (1.06 US qt) • Complete dry overhaul: 1.1 L (1.16 US qt) |
| OEM Oil Filter Code & Type | 15421-GY6-900 (Strainer Screen & O-Ring) |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 25 N·m (18.4 lb-ft / 2.55 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 160 ml (0.16 L) — SAE 85W-140 / 10W-40 (110–180 ml rear reduction gear oil) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70-14 55P · Rear: 140/60-13 63P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK CPR8EA-9 / CR8E × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX9-BS / YTX12-BS (12V 8.0–10.0Ah MF AGM) |
| Final Drive Maintenance | Dry Centrifugal V-Belt CVT — Inspect/replace V-belt and rollers every 15,000–20,000 km |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 14.3 hp @ 8,750 rpm · 11.8 N·m (8.7 lb-ft) @ 6,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 750 mm (29.5 in) · 179 kg (395 lbs) |
| Fuel Tank & Est. Real-World Range | 12 L (3.2 US gal) · ~34 km/L → ~408 km (254 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 300 km • Engine Oil / Filter: 3,000 km / 6,000 km • Air Filter / Spark Plug: 6,000 km / 10,000 km • Valve Clearance Check: 10,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Shares the full-size Cruisym 300 bodywork and dual-helmet bay, gaining LED projector lighting, LCD dash, and TCS on the 2021+ Cruisym Alpha 125.
Oil & Clutch Mechanical Engineering Note
High-load 14.3 hp 125cc operation inside a 179 kg chassis requires fresh SAE 10W-40 JASO MB synthetic oil every 3,000 km plus 160 ml rear gear oil.