Here we offer a complete 2-valve 4-stroke engine for all Chinese scooters with 10 inch wheels. 3.5 x 10 / 3.00 x 10 / 90 / 90-10 etc. An engine replacement is usually much cheaper than expensive workshop costs. The set includes all components such as engine parts, alternator, starter etc. Comes as shown in the photo. The carburetor must be ordered separately in our shop. 10" motors are identical to the transmission output shaft. Output shaft protrudes 30mm from the transmission box, total length 126mm. Simply measure flat on the vehicle. If your engine has a different shaft, it can be easily transferred from your engine to the new one. The time required for this work is about 20-30 minutes. Attention: check the oil level after installation. We also recommend changing the oil after the first 50 km. In the engine is a V-belt 669 mm long. This belt must also be installed in your original engine. This engine is without SLS clutch. Shortwave motors are usually used on vehicles with rear drum brake, long wave on vehicles equipped with disc brakes. Please check before ordering which brake is installed in your vehicle.