This piston ring set fits the 58.5mm upgrade piston. These are included in the 155cc big bore kit.Note: This only fits if you've done the Big Bore Upgrade!
Use the double-nut method to install this stud into the crankcase. When finishing your engine build, be sure to torque your cylinder nuts between 22 to 25FT/LBS. Over-tightening will lead to stretc...
Use the double-nut method to install this stud into the crankcase. When finishing your engine build, be sure to torque your cylinder nuts between 22 to 25FT/LBS. Over-tightening will lead to stretc...
