DIY – Piston Ring Replacement Overview: This article will show you how to replace the piston without removing the motor. Difficulty: 4/5 Time: 8-10 hrs Materials/Tools Needed: 4″ cylinder honing tool Sockets: 3/8″= 19mm, 17mm, 14mm, 12mm, 10mm, 10mm allen socket for the head bolts, swivel socket, 3″ extension & 5″ extension, spark plug socket. […]