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View Full Version : HELP PLEASE: Jetting for 250r using FMF Fatty Gold Series Header Pipe???????????


LockNut
10-08-2009, 08:49 PM
Does anybody know the answer to this question? Or should I just leave it at the stock jetting?

Many Thanks.
harryredtrike
10-09-2009, 04:31 AM
your going to have to go up a jet or two,and play with the air mix screw.youll have to tune the carb to the pipe.
Kintore
10-09-2009, 07:50 AM
On my spare 85R, the jetting so rich from factory that I threw a FMF Fatty and some reeds in there, and the plugs came out paper bag brown.

Just throw it on there and see with a plug chop