These FCR's carb's do have a "chirp" to them.You did adjust the fuel screw,right-how many turn's from seated? 3 turn's try one size smaller PJ,one turn try 1 one size bigger.Made sure no vacuum leak's first.
97dr650 FCR-MX pumper
,plus other goodies
sandwash screwed with this post 12-08-2012 at 03:50 PM