SYM Jet 14 125 LC — OEM Fluid, Tire Pressure & Maintenance Specs
124.6cc Liquid-Cooled Single SOHC 4-Valve with 14-Inch Wheels & Flat Floor · Source: SYM Jet 14 125 LC (2017–Present) Official Owner’s Manual Maintenance Specifications
According to the SYM Jet 14 125 LC (2017–Present) Official Owner’s Manual Maintenance Specifications, the 2017–Present SYM Jet 14 125 LC (chassis XB12W1/XC12W) requires 0.8 L (0.85 US qt) of SAE 10W-40 (JASO MB, API SJ/SL Synthetic Blend 10W-40) engine oil for a drain-only change and 0.9 L (0.95 US qt) with filter service (15421-GY6-900 (Strainer Screen & O-Ring)). Standard solo cold tire pressure is 180 kPa / 1.80 bar / 26 PSI front (100/90-14 51P) and 200 kPa / 2.00 bar / 29 PSI rear (110/80-14 59P), paired with 1× NGK CPR8EA-9 spark plug(s) and a YTX7A-BS battery.
Drain only: 0.8 L (0.85 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~293 km (182 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: 0.8 L (0.85 US qt) • With filter/strainer: 0.9 L (0.95 US qt) • Complete dry overhaul: 1 L (1.06 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 | 100 ml (0.10 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: 100/90-14 51P · Rear: 110/80-14 59P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 180 kPa / 1.80 bar / 26 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 180 kPa / 1.80 bar / 26 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK CPR8EA-9 × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX7A-BS (12V 6.0Ah 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 · 12.6 hp @ 8,000 rpm · 11.5 N·m (8.5 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 770 mm (30.3 in) · 135 kg (298 lbs) |
| Fuel Tank & Est. Real-World Range | 7.5 L (2.0 US gal) · ~39 km/L → ~293 km (182 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
Flat-floorboard urban commuter riding on 14-inch wheels; liquid-cooled LC trims add a 4-valve head and dual hydraulic disc ABS over early air-cooled drum models.
Oil & Clutch Mechanical Engineering Note
Liquid-cooled Jet 14 125 LC takes 0.8–0.9 L of SAE 10W-40 JASO MB oil across its mesh-strainer sump plus 100 ml of SAE 85W-140 gear oil.