Engine Kits

Engine Kits That Define Power, Fitment, and Reliability

TMF Cycles offers Harley engine kits for riders who want predictable gains without guesswork. A well-matched motorcycle engine rebuild kit balances displacement, compression, and component compatibility. That logic is clear in The Fuel Moto M8 Kit. This Harley big bore engine kit converts 114" or 117" Milwaukee-Eight engines into a 128" setup without case boring. It uses custom CP Carrillo dished pistons, Extreme Duty cylinders, and Cometic MLS head and base gaskets. The 10.75 compression ratio works especially well with shorter lift cams, making it practical for riders planning cam upgrade kits for Harley without chasing tuning problems. Compatibility with air-cooled and twin-cooled Touring and Softail models keeps this option flexible for modern builds needing EFI tuning engine kits support.

For earlier platforms, V-Twin MFG options show how targeted piston and cylinder kits simplify Harley upgrades. The 95-inch Big Bore Black Cylinder Kit increases Twin Cam 88 engines to 95 cubic inches using bolt-on cylinders. It includes cast pistons with rings pre-fitted, head gaskets, and requires no crankcase machining. This makes it a smart top-end rebuild kit Harley solution for 2000–2006 FL, FXD, and FXST models. Going further back, the Evolution 83-inch Big Bore Cylinder Kit uses aluminum cylinders with cast-in steel sleeves and Wiseco forged pistons at 10:1 compression. Again, no case boring is required, which matters during classic V-Twin engine kits planning. Together, these products show how Harley performance kits and Harley complete engine upgrade kits deliver controlled power increases while preserving engine integrity. They also fit naturally within broader motorcycle engine or motor kits and complete performance engine kits strategies.