This is our recomendation for Larger YX ZS type Pit bike engines
Maxum4 Premium Premium Petroleum Blend Non synthetic
Promotes good clutch action
Smoke resistant break in qualities

4-Cycle Motorcycle Specific Oil 10w40 Maxima’s Maxum4 Premium is a superior product featuring advanced additive technology in the development of highly stable and long life multi-grade motorcycle specific oil. By using an exclusive blend of petroleum base stocks and advanced anti-wear, anti-shear additives, this product assures viscosity stability for 4-cycle engines with integrated transmissions. This formula also has extra anti-scuff additives to handle extreme loads and peak temperatures in high performance engines. Premium Petroleum Blend