SYM ADX 125 — OEM Fluid, Tire Pressure & Maintenance Specs
125cc Liquid-Cooled Single SOHC 4-Valve EnMIS Crossover Scooter (15L Tank · Monoshock · TCS) · Source: SYM ADX 125 (TEA12T1) Official Owner’s Manual Maintenance Specifications
According to the SYM ADX 125 (TEA12T1) Official Owner’s Manual Maintenance Specifications, the 2023–Present SYM ADX 125 (chassis TEA12T1/TE12W) requires 0.85 L (0.90 US qt) of SAE 10W-40 (JASO MB, API SN Synthetic) engine oil for a drain-only change and 0.9 L (0.95 US qt) with filter service (15421-GY6-900 (Oil Strainer Screen)). Standard solo cold tire pressure is 180 kPa / 1.80 bar / 26 PSI front (120/70-13 53P) and 200 kPa / 2.00 bar / 29 PSI rear (130/70-13 63P), paired with 1× NGK CPR7EA-9 spark plug(s) and a YTZ8V / YTX7A-BS battery.
Drain only: 0.85 L (0.90 US qt)
R 200 kPa (2.00 bar)
Est. Range: ~570 km (354 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 SN Synthetic |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.85 L (0.90 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 (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 | 24 N·m (17.7 lb-ft / 2.45 kgf·m) — Use fresh crush washer |
| Final Drive / Bevel Gear Oil | 100 ml (0.10 L) — SAE 85W-140 or 85W-90 API GL-5 Gear Oil (100 ml drain / 110 ml total) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 120/70-13 53P · Rear: 130/70-13 63P (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 CPR7EA-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTZ8V / YTX7A-BS (12V 7.0Ah Sealed MF AGM (Idle-Stop Spec)) |
| Final Drive Maintenance | SYM OEM CVT V-Belt — Inspect at 12,000 km / Replace every 15,000–20,000 km |
| Brake Fluid & Coolant | DOT 4 · Silicate-Free Ethylene Glycol Premix (Side-mounted radiator, ~0.55 L) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 12.3 hp @ 7,500 rpm · 11.5 N·m (8.5 lb-ft) @ 7,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 810 mm (31.9 in) · 153 kg (337 lbs) |
| Fuel Tank & Est. Real-World Range | 15 L (4.0 US gal) · ~38 km/L → ~570 km (354 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 300 km • Engine Oil / Filter: 3,000 km / 6,000 km • Air Filter / Spark Plug: 10,000 km / 10,000 km • Valve Clearance Check: 10,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Launched in late 2023 above the commuter Jet 14, the ADX 125 packs a class-shattering 15.0 L fuel tank, horizontal laydown monoshock, Z.R.S.G. brushless starter-generator idle-stop, 5-inch TFT dash, dual-channel Bosch ABS, and TCS.
Oil & Clutch Mechanical Engineering Note
Running a dry centrifugal CVT and a screen-only 0.85 L oil sump, the ADX 125 thrives on low-friction SAE 10W-40 JASO MB scooter oil changed strictly every 2,500–3,000 km—always measure with a graduated cup rather than dumping a full 1.0 L bottle.
Garage Wrenching Gotchas
- While SYM’s A.L.E.H. anti-lift engine mount and central monoshock tame squat, the 810 mm seat height and wide crossover bodywork sit noticeably taller than a 764 mm PCX 125 at stoplights.
- Its Z.R.S.G. brushless alternator-starter relies on healthy battery voltage to enable Idle-Stop; wire phone chargers and heated grips strictly through a switched ignition relay.
5. Frequently Asked Questions (FAQ)
Can the SYM ADX 125 really ride over 500 km on a single tank of fuel?
Yes! Combining a massive 15.0 L (3.96 US gal) crossover tank with ~38 km/L fuel economy delivers 520–570 km of real-world range between fill-ups—nearly double typical 125cc scooters.
What are the exact engine oil and gear oil capacities for the SYM ADX 125?
Engine oil takes 850 ml (0.85 L) on a standard drain (900 ml when cleaning the strainer screen), and rear reduction gear oil takes 100 ml of SAE 85W-140 / 85W-90 GL-5.
What tire sizes and cold pressures does the ADX 125 run?
It rolls on 120/70-13 front and 130/70-13 rear dual-purpose tubeless tires inflated cold to 180 kPa (26 PSI) front and 200 kPa (29 PSI) solo / 225 kPa (33 PSI) two-up rear.