SYM Cruisym 300 (Cruisym α) — OEM Fluid, Tire Pressure & Maintenance Specs
278.3cc Liquid-Cooled Single SOHC 4-Valve Dry-CVT Maxi-Scooter (2-Helmet Under-Seat Storage) · Source: SYM Cruisym 300 / Cruisym α 300 Official Owner’s Manual Specifications
According to the SYM Cruisym 300 / Cruisym α 300 Official Owner’s Manual Specifications, the 2018–Present SYM Cruisym 300 (Cruisym α) (chassis LX30A2/LN30W) requires 1.2 L (1.27 US qt) of SAE 10W-40 (JASO MB, API SJ/SN Synthetic) engine oil for a drain-only change and 1.2 L (1.27 US qt) with filter service (15421-HM6-000 (Oil Strainer Screen)). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (120/70-14 55P) and 250 kPa / 2.50 bar / 36 PSI rear (140/60-13 63P), paired with 1× NGK CR8E spark plug(s) and a YTX12-BS battery.
Drain only: 1.2 L (1.27 US qt)
R 250 kPa (2.50 bar)
Est. Range: ~354 km (220 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 10W-30 (동절기 한랭지 허용)) · JASO MB · API SJ/SN Synthetic |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1.2 L (1.27 US qt) • With filter/strainer: 1.2 L (1.27 US qt) • Complete dry overhaul: 1.4 L (1.48 US qt) |
| OEM Oil Filter Code & Type | 15421-HM6-000 (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 | 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 (or 85W-90 below 0°C) API GL-5 Gear Oil (160 ml) |
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: 250 kPa / 2.50 bar / 36 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 CR8E × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX12-BS (12V 10.0Ah Sealed MF AGM) |
| Final Drive Maintenance | SYM OEM Drive V-Belt (1B01HMA01) — Replace every 20,000 km (inspect at 15,000 km) |
| Brake Fluid & Coolant | DOT 4 · Silicate-Free Ethylene Glycol 50:50 Premix Coolant (~1.1 L) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 278 cc · 26 hp @ 7,500 rpm · 26.2 N·m (19.3 lb-ft) @ 6,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 760 mm (29.9 in) · 194 kg (428 lbs) |
| Fuel Tank & Est. Real-World Range | 12 L (3.2 US gal) · ~29.5 km/L → ~354 km (220 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 300 km • Engine Oil / Filter: 3,000 km / 6,000 km • Air Filter / Spark Plug: 12,000 km / 12,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Succeeding the Joymax/GTS 300i lineage, the 2018–2020 Euro 4 Cruisym 300 evolved into the 2021+ Euro 5 Cruisym α (Alpha) 300 with standard traction control (TCS), LED projector headlights, and LCD instrumentation.
Oil & Clutch Mechanical Engineering Note
Unlike Forza 350 or XMAX 300, the Cruisym 300 uses NO replaceable paper oil filter—only a cleanable wire-mesh thimble screen! Consequently, SYM’s manual mandates strict 3,000 km oil changes (after a 300 km break-in drain) using 1.20 L of low-friction SAE 10W-40 JASO MB scooter oil.
Garage Wrenching Gotchas
- Never stretch oil changes past 3,000 km on this screen-only 1.2 L sump! Reset the dash OIL CHECK indicator after every drain and rinse the left-bottom strainer cap screen every second change.
- SYM specifies thick hypoid gear oil (SAE 85W-140 above 0°C, or SAE 85W-90 in freezing winters, 160 ml refill) for the rear reduction gearbox rather than thin engine oil.
5. Frequently Asked Questions (FAQ)
Does the SYM Cruisym 300 have a replaceable oil filter?
Correct—there is no disposable paper or spin-on cartridge; simply unscrew the strainer cap, clean the reusable wire-mesh screen with solvent, inspect its O-ring, and refill with 1.20 L of 10W-40 JASO MB oil.
Should the dipstick be screwed in when checking oil on a Cruisym 300?
Do not thread it in—place the scooter on its centerstand on level ground and rest the wiped dipstick unthreaded on the filler neck.
Can the SYM Cruisym 300 fit two full-face helmets under the seat?
Yes—pairing a 13-inch rear wheel with a sculpted 760 mm seat frees up a deep ~45 L illuminated under-seat bay capable of swallowing two standard full-face helmets.