MotorWitch Top End Kits

Available in 124, 129, 131, and 143 for all Harley M8 motors. Each kit includes pistons, cylinders, and gaskets—everything you need for serious horsepower.
 
Our cylinders start as a 36-pound block of U.S.-sourced aluminum. From there, they’re precision-cut on a 5-axis CNC machine and finished with a Darton sleeve for maximum strength and reliability.
 
All kits are made to order. To place an order or talk about options, give the shop a call.
 
Note: We currently do not offer Twin Cam cylinders, but a 124 Twin Cam kit is in the works—stay tuned.