Upgrade your Milwaukee-Eight engine with the ultimate performance bundle. This comprehensive Power Package combines all the necessary matched components into one kit, engineered to significantly increase displacement and power while ensuring long-term reliability. By choosing a complete kit, you ensure that every part is designed to work seamlessly together, saving you time and providing a significant performance boost over stock setups.
Big Bore Kit:
Bolt-on installation with no case machining required
4.250″ bore with forged pistons
Available in various compression ratios for optimized performance
Constructed with high-quality finishes to match your engine aesthetic
Oil Pump & Cam Plate:
Precision machined from billet aluminum with a blue anodized finish
Independent scavenge sections for flywheel cavity and cam chest
Debris screens and magnets to prevent engine contamination
Increased flow capacity on both feed and scavenge sides
Adjustable pressure relief valve (adjustable with unit installed)
Cam & Valvetrain:
S&S 550 Cam designed specifically for Big Bore applications
Choice of Gear Drive for improved timing accuracy or Chain Drive systems
Quickee Pushrods for easy installation and maintenance
S&S Premium or Precision Tappets for quiet, reliable operation
Billet aluminum Tappet Cuffs to eliminate distortion and improve stability at high RPM
High-performance conical single wire valve springs for cams up to .605 lift
Additional Features:
Includes all necessary gaskets, bearings, and hardware required for installation
MADE IN THE USA
Note: Not recommended for Tri-Glide or other three-wheel models due to the unique engine loading characteristics of those motorcycles.
