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View Full Version : big bore kits



dmp0001
10-05-2007, 12:46 AM
has anyone seen or done one of these bolt on big bore kits? I am interested in how much more power you would get (sorry, I dont know how to make a link)

www.revperf.com/XL/xlPerformxb9.html

LeFox
05-03-2009, 06:46 AM
xl is the tuber engine (sportster engine) and does not fit the xb.