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Big Bore Kits

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Athena Hyper Race 70cc Big Bore Kit The Hyper Race 70cc Complete Big Bore Kit is the race version of the popular Athena 70cc Big Bore kit with all of the components you need to make your engine rac...
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Athena
2-Stroke 70cc Big Bore Kit
$176.99
You save $31.96 (15%)
  • Aluminum
(3)
Athena 2-Stroke 70cc Big Bore Kit Athena's Big Bore Kit features a cast aluminum cylinder with a nickel carbide plated bore. All Athena kits come with a cylinder, cylinder head, piston assembly (pi...
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BBR
88cc FTP Big Bore Kit with Cam
$197.99
You save $21.96 (9%)
(0)
BBR 88cc FTP Big Bore Kit with Cam A great combination of power, reliability and easy installation makes this kit our best seller. Cylinder retains mounts for easy skid plate installation. Excel...
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Dragonfire
RZR 857cc Billet Big Bore Kit
$1,519.99
You save $80.00 (5%)
  • Silver
(0)
Dragonfire Racing RZR 857cc Billet Big Bore Kit Through years of experience and passion for racing engines of all types we have continued to develop the best solutions from top to bottom for your ...
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BBR
150cc Big Bore Kit
$359.99
You save $39.96 (9%)
(0)
BBR 150cc Big Bore Kit Add some grunt to your bike with one of BBR's Big Bore Complete Cylinder Kits. Features: New aluminum cylinder with steel liner is bored, honed and ready to assemble H...
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S&S Cycle 106" Big Bore Kit At 3.927? bore, these cylinders have the largest bore that S&S feels can safely be used in a cylinder with stock spigot diameter This kit is only offered with S&S cy...
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Dragonfire
975cc Big Bore Kit for RZR XP 900
$1,662.99
You save $87.00 (4%)
  • Silver
(0)
Dragonfire Racing 975cc Big Bore Kit for RZR XP 900Dragonfire is no stranger to horsepower. They know what it takes to win, after all they have taken both the GNCC & WORCS championships in 2011. Th...
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S&S Cycle 97" Big Bore Kit The 97" Big Bore kit for 88" motors yield excellent results with stock cylinder heads Feature the largest bore (3.927") that can safely be used in a cylinder with stoc...
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Athena 280cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged pisto...
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Athena 490cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged piston with molybde...
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Athena 290cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged pist...
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Athena
480cc Big Bore Cylinder Kit
$521.99 - $909.95
You save up to $57.96 (9%)
(0)
Athena 480cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged pisto...
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Athena 430cc Big Bore Cylinder Kit Bolt on kit, no machining required Aluminum cylinder with nickel-carbide coating designed with wider water jackets Complete piston kit, Forged piston w...
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Wiseco
Pro Lite Piston Kit
$69.00 - $181.80
You save up to $58.20 (24%)
(13)
Video
VIDEO     
Wiseco Pro Lite Piston Kit Available for both two stroke and four stroke bikes, the Wiseco Pro Lite Piston Kit is both a great OEM alternative and an easy way to boost the power. Choose stock bore ...
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Athena
Top End Gasket Kit
$12.99 - $113.95
You save up to $3.96 (23%)
(1)
Athena Top End Gasket Kit Manufactured in "State-of-the-Art" computer controlled facilities All gaskets made from the highest quality materials All gasket sets meet or exceed OEM specifications The...
Closeout 20% off
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WSM
Top-End Rebuild Kit
$94.00
You save $23.95 (20%)
(0)
Closeout 20% off
WSM Top-End Rebuild Kit Top-End Rebuild Kit Includes: Pistons Rings Pins Clips Needle bearings Head and base gaskets Intake and exhaust gaskets *Note: Image is for reference only.
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Cylinder Works
Cylinder Kit
$503.99 - $899.99
You save up to $99.96 (9%)
(0)
Cylinder Works Cylinder Kit Replace that tired, worn out, or blown up engine with a new Cylinder Works Cylinder Kit. Each kit contains all the necessary parts to get your ATV or Dirt Bike back on...
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