Top End

Cylinders have a stock bolt patternBored slightly under nominal size and are not honedDesigned for 124" Hot Set Up Kits used in '99-'17 Twin CamsWrinkle black finish with machined edgesRequires crankcase machining.Made in the U.S.A.

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

Kit includes fitted forged pistons, pins, clips, rings, cylinders, head gaskets, base, and exhaust gaskets10.9cc dished pistons; 10.6:1 compression ratio w/stock 85cc cylinder headsFor use with stock heads or S&S heads with stock bolt pattern4.625"...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

103" stock motors or motors with factory 95" kits require piston kit only; stock or S&S cylinder heads can be usedMade in the U.S.A.Fuel-injected motors will require recalibration of the fuel-injection system.This project requires a skilled technician...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

103" stock motors or motors with factory 95" kits require piston kit only; stock or S&S cylinder heads can be usedMade in the U.S.A.Fuel-injected motors will require recalibration of the fuel-injection system.This project requires a skilled technician...

Cylinder and piston kits contain S&S 3-1/2" bore (80") cylinders and forged pistons, rings, wrist pins, and head and base gasketsThe pistons included in kits are flat-topped cast pistons designed to be used with either stock cylinder heads or with S&S...

Cylinder and piston kits contain S&S 3-1/2" bore (80") cylinders and forged pistons, rings, wrist pins, and head and base gasketsThe pistons included in kits are flat-topped cast pistons designed to be used with either stock cylinder heads or with S&S...

Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side modelsCylinder Head Service Kits include the below components:Lightweight Racing Valve Spring kits with steel or titanium retainers, beehive or...