Sportster Performance Kits

Tired of the headache of trying to piece together engine packages that may or may not work the way you planned? We have done the research for you and even packaged the proper components at significant savings over buying them separately! Each of these kits has not only proven itself on the dyno but in the real world also!

For the really BIG horsepower numbers, Stage 3 kits are available in bigger bore sizes. These kits are custom tailored to your needs and budget so call for details.

Bolt-On Big
Bore Kits
XL/Buell Bolt-On Big Bore Kit photo
All Revolution™ cylinder and piston kits come complete with our one piece, all aerospace grade aluminum nickel-silicon carbide plated bore cylinders, complete forged piston kit and head and base gasket kit! Our industry leading lifetime warranty applies to all our cylinders! Now come and get’m!

Buy these in the new online store.
Description Contents Styles Price (U.S.) Buy Now
Bolt-on big bore kit, 1250cc (use with Thunderstorm heads) 3-9/16 bore Revolution cylinders 10.5:1 dome forged pistons, pins, clips, rings head & base gaskets Black Highlight 201-502
Black 201-503
Silver 201-501
$999.95 Enter Store link
Bolt-on big bore kit, 1250cc (use with XL1200S heads) 3-9/16 bore Revolution cylinders 10.3:1 forged flat top pistons, pins, clips, rings head & base gaskets Black Highlight 201-405
Black 201-406
Silver 201-404
$999.95 Enter Store link
Bolt-on big bore kit, 1250cc (use with XLH1200 heads) 3-9/16 bore Revolution cylinders 10.5:1 forged dome pistons, pins, clips, rings head & base gaskets Black Highlight 201-402
Black 201-403
Silver 201-401
$999.95 Enter Store link
Bolt-on big bore kit, 1250cc (use with XLH883 heads) 3-9/16 bore Revolution cylinders 10:1 forged dish pistons, pins, clips, rings head & base gaskets Black Highlight 201-414
Black 201-415
Silver 201-416
$999.95 Enter Store link
Monster Big Bore Kits XL/Buell Monster Big Bore Kits photo

Kits come complete with Revolution all aluminum Nickel Silicon Carbide coated cylinders, forged pistons, wrist pins, locks, rings and head/base gasket kits, as well as a lifetime warranty. Available in natural silver, all black, and black with highlighted fins.

Our 3.875" bore kits deliver a whopping 90 inches to your big bore project in your OEM cases! This bore size can only be achieved by utilizing our one piece aerospace alloy cylinders and plating process. Don’t be fooled by the imitators. Go fast with the innovators! From a stump pulling touring machine to an all out race bike this is THE kit to have to be as big as you can be!

All require case boring.

Buy these in the new online store.
Description Contents Styles Price (U.S.) Buy Now
Big bore kit, 88" (1430cc) (6.8cc dished piston) (CASE BORING REQUIRED) 3-13/16" bore Revolution cylinders 10.5:1 forged pistons (reverse dome only), pins, clips, rings head and base gaskets (10.5:1 compression is calculated with a 62cc combustion chamber.) Black Highlight 201-408W
Black 201-409W
Silver 201-410W
$999.95 Enter Store link
Big bore kit, 90" (1474cc) (Flat top pistons) (CASE BORING REQUIRED) 3-7/8" bore Revolution cylinders 10.5:1 forged pistons, pins, clips, rings head and base gaskets (Compression will vary depending on cylinder heads that are being used.) Black Highlight 201-411W
Black 201-412W
Silver 201-413W
$999.95 Enter Store link
Power Packages  
Throttle body not included.
Description Contents Cylinder Styles Price (U.S.)
XL Sportster 07-present Stage 2 Injected Engine Kit, 1250cc
  • 3-9/16" bore Revolution cylinders
  • 10.5:1 pistons, pins, clips, rings
  • 1.85 Cylinder Head prep (Customer Supplied Heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoloy Adjustable Pushrods
Black Highlight, Black or Silver $2391.95
XL Sportster 07-present Stage 2 Injected Engine Kit, 90"
  • 3-7/8" bore Revolution cylinders
  • 10.5:1 forged pistons, pins, clips, rings
  • 1.85 Cylinder Head Prep (Customer supplied heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoly Adjustable Pushrods
Black Highlight, Black or Silver $2391.95
XL Sportster 07-present Stage 3 Injected Engine Kit, 1250cc
  • 3-9/16" bore Revolution cylinders
  • 10.5:1 pistons, pins, clips, rings
  • 1.9 Cylinder Head prep (Customer Supplied Heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoloy Adjustable Pushrods
Black Highlight, Black or Silver $2628.95
XL Sportster 99-07 Stage 2 Carb Engine Kit, 1250cc
  • 3-9/16" bore Revolution cylinders
  • 10.5:1 forged pistons, pins, clips, rings
  • 1.85 Cylinder Head Prep (Customer supplied heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoly Adjustable Pushrods
  • Mikuni HSR42 Flatside
Black Highlight, Black or Silver $2750.95
XL Sportster 99-07 Stage 3 Carb Engine Kit, 1250cc
  • 3-9/16" bore Revolution cylinders
  • 10.5:1 pistons, pins, clips, rings
  • 1.85 Cylinder Head prep (Customer Supplied Heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoloy Adjustable Pushrods
  • Mikuni HSR42 Flatside
Black Highlight, Black or Silver $2987,95
XL Sportster 99-07 Stage 3 Carb Engine Kit, 90" - (CASE BORING REQUIRED)
  • 3-7/8" bore Revolution cylinders
  • 10.5:1 forged pistons, pins, clips, rings
  • head and base gaskets
  • 1.9 Cylinder Head Prep (Customer supplied heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoly Adjustable Pushrods
  • Mikuni HSR42 Flatside
Black Highlight, Black or Silver $3117.95
XL Sportster 07-present Stage 3 Injected Engine Kit, 90" - (CASE BORING REQUIRED)
  • 3-7/8" bore Revolution cylinders
  • 10.5:1 pistons, pins, clips, rings
  • head and base gaskets
  • 1.9 Cylinder Head prep (Customer Supplied Heads)
  • Complete Top End Gasket Set
  • Matching Street Performance Camshafts
  • Chromoloy Adjustable Pushrods
Black Highlight, Black or Silver $2759.95