Read this first. Every value on this page is typical or indicative for the 300cc utility ATV class, compiled for dealer workshops. Yangtze Moto Export is an export company, not the manufacturer. The owner’s and service manual supplied with each unit prevails wherever it differs; where a value is not printed in your manual, use these as a starting point and confirm by inspection.
Specifications (typical for the platform)
| Type | Single, 4-stroke, SOHC 4-valve, liquid- or air-cooled (typical; confirm) |
| Displacement | 250–300 cc |
| Fuel system | EFI or carburettor |
| Rated output | ≈ 13–18 kW (18–24 hp) |
| Transmission | CVT H/L/N/R, shaft (most) or chain |
| Racks | ≈ 30 kg front / 60 kg rear typical; tow 300–400 kg |
| Fuel | 92 RON; tank 12–16 L |
Catalog models on this platform: 300cc Utility ATV. Model-specific figures are on each model page.
Fluids & capacities
| Engine oil | 10W-40 JASO MA; ≈ 1.5–2.0 L |
| Rear gearbox / diff | 80W-90 GL-5; ≈ 0.2–0.3 L |
| Front diff (4WD) | 80W-90; ≈ 0.2 L |
| Coolant | ≈ 1.5 L |
| Brake fluid | DOT 4 |
Break-in
- 0–10 h: vary throttle, no towing, no full throttle.
- CVT belt: 30–50 km gentle bedding.
- First service 10–20 h: oil + filter, gearbox oils, belt check, re-torque wheel nuts and rack bolts.
Maintenance schedule
| Item | First | Then every | Notes |
|---|---|---|---|
| Engine oil & filter | 10–20 h | Every 100 h / 2,000 km | |
| Gearbox / diff oil | 20 h | Every 200 h or yearly | |
| CVT belt | 20 h | Inspect 50 h; replace when cracked | |
| Air filter | — | Clean 25 h in dust | |
| Valve clearance | 20 h | Every 200 h | |
| Spark plug | — | 200 h | |
| Wheel nuts | 50 km | Every 50 h | |
| Grease points | — | Every 50 h |
Halve intervals for dust, sand, taxi/cargo duty or track use.
Torque values (indicative)
| Wheel nuts | ≈ 45–55 Nm (10 mm studs) |
| Hub nuts | ≈ 100–140 Nm |
| A-arm bolts | ≈ 35–45 Nm |
| Rack bolts | ≈ 20–25 Nm |
| Drain plug | ≈ 22 Nm |
| Note | Indicative values for this class of machine. Use the value printed in the supplied manual if it differs. |
Tire pressures
| 22–25" utility tires | 0.35–0.5 bar (5–7 psi) — check the sidewall; ATV tires run very low |
Common issues
| Symptom | Likely cause | Fix |
|---|---|---|
| Won’t start | Battery, brake-lever interlock, kill switch left off. | Charge; hold the brake; kill switch to RUN. |
| Belt slips in water crossings | Water in CVT housing. | Open the CVT drain plug; dry; check vent hose routing above the seat line. |
| Reverse hard to engage | Cable adjustment; shifter linkage loose after crating. | Adjust the shift cable; torque linkage. |
| Pulls to one side | Tire pressures uneven (very sensitive at 5 psi) or toe out. | Equalise pressures with a low-range gauge; set toe. |
Fast-moving parts (recommended per 10 units)
| Part | Per 10 units | Note |
|---|---|---|
| CVT belt | 4 | |
| Oil filter | 15 | |
| Air filter | 10 | |
| Spark plug | 10 | |
| Brake pads / shoes | 10 sets | |
| Cables (throttle, brake, shift) | 3 each | |
| Wheel bearings | 8 | |
| Racks & bumpers (cosmetic) | 1 set | |
| Starter relay / CDI-ECU | 2 / 1 |
Tools & safety
Workshop tools
- Metric kit to 32 mm
- Torque wrench
- Low-pressure tire gauge (0–1 bar)
- Grease gun
- Charger
Safety notes
- ATV tires at 5 psi look flat — do not over-inflate to “look right”; it destroys handling.
- Rental fleets: fit throttle limiters (supplied) for novice riders.
Missing a value your manual does not print? Send the VIN and the question: WhatsApp +1 646 235 7816. We answer within 48 hours and add the answer to this page.