With most four-stroke motorcycles, the engine oil performs multiple functions, including lubricating the motor, clutch and gearbox. Valvoline’s reformulated 4-Stroke 20W-50 Motorcycle Oil is uniquely designed to excel at all three demanding tasks.
1987-1994 Moto-4 (YFM350ER). Factory Racing Parts SAE 10W-40 Full Synthetic 4 Quart Oil Change Kit. 4 quarts of Factory Racing Parts SAE 10W-40 Powersports Engine Oil. Our 10W-40 Powersports Engine Oil is engineered specifically for 4-stroke motorcycle engines and transmissions.