YX140 Crank Case Gearbox Bearings Kit For 1P56FMJ Engine YX 140cc Pit Dirt Bike This bearing kit is designed for the crank case gearbox of the 1P56FMJ engine used in YX 140cc pit dirt bikes.It includes a set of bearings that support internal gear components to smooth transmission.The bearings are engineered to fit specific housing dimensions and rotational requirements of the engine's gearbox assembly.Proper installation is required to maintain alignment and operational efficiency.This kit is intended as a replacement or upgrade for worn or damaged bearings in the gearbox unit.This is a replacement part from a third party.All brand/model references serve only to show intended compatibility.