The 515cc - set up similar to NHRS's LSR Blast motor wise, my next step come rebuild time will be a true 650cc 4.19" cyl ala the XBRR by Nallin - Terry P. just did an LSR with one and put out 80 hp and 70ft-lbs, I of course will take a more streetable approach and so achieve less, however, it should still put out numbers to surprise the XB crowd - lol
GT - JBOTDS! EZ[cool]