yes the case has to be split. it is a lot of work. if i was going to split the cases i would just go with the 1100 big bore and be done with it. keep your stock crank and still make 80Ibs of TQ. but i think most will be just as happy with the 904, and it is considerably cheaper
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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