SYM Joymax Z+ 300 — OEM Fluid, Tire Pressure & Maintenance Specs
278.3cc Liquid-Cooled Single SOHC 4-Valve with TCS · Source: SYM Joymax Z+ 300 (2021–Present) Official Owner’s Manual Maintenance Specifications
According to the SYM Joymax Z+ 300 (2021–Present) Official Owner’s Manual Maintenance Specifications, the 2021–Present SYM Joymax Z+ 300 (chassis LX30A2/Z300) requires 1.2 L (1.27 US qt) of SAE 10W-40 (JASO MB, API SJ/SL Synthetic Blend 10W-40) engine oil for a drain-only change and 1.2 L (1.27 US qt) with filter service (15421-HM6-000 (Strainer Screen)). 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 CR8E spark plug(s) and a YTX12-BS battery.
Drain only: 1.2 L (1.27 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~358 km (222 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: 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 (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 API GL-5 Rear 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: 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 CR8E × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX12-BS (12V 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 | 278 cc · 25.6 hp @ 7,500 rpm · 26.2 N·m (19.3 lb-ft) @ 6,750 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 747 mm (29.4 in) · 185 kg (408 lbs) |
| Fuel Tank & Est. Real-World Range | 12 L (3.2 US gal) · ~29.8 km/L → ~358 km (222 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
Built around Cruisym 300’s 278cc engine with a slimmer commuter fairing and ultra-low 747 mm seat; the 2021+ Joymax Z+ refresh added twin LED headlights and switchable TCS.
Oil & Clutch Mechanical Engineering Note
Using only a bottom mesh strainer screen and a compact 1.2 L sump, stick strictly to 3,000 km changes of SAE 10W-40 JASO MB oil plus 160 ml of SAE 85W-140 rear gear oil.
Garage Wrenching Gotchas
- Never use an impact gun on the large aluminum oil-strainer cap—hand-start threads carefully with a lightly oiled O-ring and torque to 25 N·m to avoid cracking the crankcase boss.
- Check oil level on the centerstand by resting the dipstick UNTHREADED against the filler threads; screwing it in gives a falsely high reading and leaves the 1.2 L sump low.
5. Frequently Asked Questions (FAQ)
What are the engine oil and rear hub gear oil capacities for the SYM Joymax Z+ 300 scooter?
With an isolated dry CVT belt case, the engine requires 1.2 L drain-only or 1.2 L (1.27 US qt) with filter/screen (15421-HM6-000 (Strainer Screen)) of SAE 10W-40 (JASO MB). Service the rear reduction hub separately (final drive 160 ml).
How do you accurately check the oil level on the Joymax Z+ 300, and what are its service intervals?
Hold the bike upright on level ground 2–3 minutes after shutdown, wipe the dipstick, and rest it on the filler threads without screwing it in (threading it in reads artificially high and risks oil starvation). Torque the drain plug to 25 N·m with a new crush washer. Factory oil change intervals are every 3,000 km, with valve clearance inspection every 10,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Joymax Z+ 300?
Fitted with 120/70-14 55P front and 140/60-13 63P rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 29 / 33 PSI (200/225 kPa) solo or 29 / 36 PSI loaded. Seat height is 747 mm (29.4 in) at 185 kg wet weight, delivering ~358 km per 12 L tank.