My old 583 had - 58bhp. IIRC Stage 2 Dynojet kit, middle of the 3 options on needles, open top filter box (no cover), 900ss headers - twin 900SL exhaust. New I had posted this before: from 2006 "I changed to 146 main jets, left everything else same as 675 Dynojet kit. Running 900 headers and Hi Level 900SL open pipes. Works for me...58hp at the crank, nice curves. Doesn't idle though..." Last edited by Chris Wood : 01-Mar-2009 at 23:29. |