S&S high performance Milwaukee 3-piece flywheel crank assemblies - 4 1/2"

The crankshaft is the heart of any high-performance engine and S&S has been perfecting the art for more than six decades. Stronger, more durable and true to a specification others can only dream of, these crankshaft assemblies for Milwaukee Eight are the best of the best for building your high-performance engine. Made from heat-treated 4140 material, harder and more than twice as strong as stock. The strongest assembly eliminates the need to weld the crankpin. The high-strength connecting rods are designed with finite element analysis to eliminate weak points and handle more power. Consistent balancing and precision machining enable them to reach higher RPM and make them perfect for gear drive cams. Crankshafts with tapered piston wrist pin ends on the rods can be used with original or S&S pistons. The full-width version can only be used with S&S pistons and S&S Big Bore cylinder kits. Crankshafts with a 4 5/8" stroke can only be used with pistons designed for this stroke.  

4 5/8" stroke da:  
- 113CI from a 107CI engine with original bore of 3 15/16"
- 117CI from a 114CI engine with an original bore of 4 1/64" 
- 121CI of a 117CI engine with an original bore of 4 5/64"
- 131CI with an S&S Big Bore Kit 4 1/4" - 136CI with an S&S Big Bore Kit 4.320"


Specifications


Pack
1


HS Code
8714109090


Origin
US


Motorcycle family
Softail | Touring | Trike