For wet clutches. Bel-Ray EXP semi-synthetic Ester Blend 4T Engine Oil is a 4-stroke motorcycle oil that combines the finest quality synthetic oils with select mineral base oils ensuring the highest level of protection for all 4-stroke motorcycles. Contains shear resistant VI improvers to resist viscosity breakdown. Meets the performance requirements of API SN and JASO MA2. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches. - Synthetic Ester blended with select synthetic and petroleum components - Provides exceptional component protection and increased horsepower - Premium anti-wear properties - Superior transmission and wet clutch performance