To check the YIKONG YK4061 Rear Axle Straight Shaft (26042) for wear, lift the rear wheels off the ground and rotate them by hand while listening for grinding or clicking sounds. If you feel roughness or hear unusual noises, the shaft or its bearings may be worn. A key maintenance practice is to inspect the shaft periodically, especially after running the 5.9 kg YK4061 on extreme terrain.
