yoshimura R77 - Printable Version +- Welcome to The Australian Hayabusa Club Forum - ARCHIVE ONLY VERSION - NEW REGISTRATIONS & POSTS DISABLED (https://www.australian-hayabusa-club.com/MyBB) +-- Forum: Bike Discussions (https://www.australian-hayabusa-club.com/MyBB/forumdisplay.php?fid=35) +--- Forum: Hayabusa Gen.II (https://www.australian-hayabusa-club.com/MyBB/forumdisplay.php?fid=45) +--- Thread: yoshimura R77 (/showthread.php?tid=14253)

yoshimura R77 - petersmith69 - 11-01-2010 I need some advice please. I've changed my stockpipes to a 4-1 yoshi (R77) sounds great, but now I'm getting a bit of backfiring. does anyone know what needs to be done or should be done (remapping, jetting...)? performance is great so far. thanks RE: yoshimura R77 - TimF - 11-01-2010 The popular thing to do is to block the pair valve. But my bike still backfires occasionally and it has been remapped and had the pair valve blocked. image taken from www.busanation.com RE: yoshimura R77 - petersmith69 - 16-01-2010 thanks, i will try that. RE: yoshimura R77 - fasterfaster - 16-01-2010 Tim check for loose joints in exhaust system could be drawing air in. Map could be to rich also.