Shamrock Cycles offers a wide variety of performance kits for your twin cam engines starting with a bolt on 98ci kit to a 131ci case bored monster.

The 98ci Bolt on Big Bore kit comes with Nickel silicon carbide cylinders with a 3-15/16 inch Bore (no case boring) 10.5:1 forged pistons, pins, clips, rings, head and base gaskets for only $999.95

Set up with the right cams and head work these 98ci kits can produce over 100 ft. lbs. of torque and horse power.

We also offer 107ci, 114ci, 124cid and 131 cid motors for the Extreme riders out there.


And for all you guys that want evo performance we have 85ci Bolt/on evo kits and kits that require case boring that are 97 and 100ci kits.

If you want massive power for your v twin contact us and we can help you determine which performance motor is right for your bike.



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