Thought there where some fairly big V-Twin been brought out lately till a Harley owner mate at work that has a 2.5L Merch in his FXR with GSXR 1100 front & back end on it told me about this company called DUX that is making the motors below with massive BHP & torque . would be good to try one if the frame could hold together long enough . Check the link thats big 3.35 litre / 3350cc V-twin that will fit into a stock Harley frame
http://www.harleycustom.com/product....4&prod_id=2931
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