jetting problems???

[matt_12345]

ok guys or girls my rm seems to have lots of power at the bottom end but at about 1/4 throttle it seems liek its wide open and i can give it abotu half throttle then jam on it and it dosnt seem like ti really revs much higher and it dosnt pull any harder.. a friend told me that because i didnt rejet it after putting an fmf fatty pipe on it that its prolly starved for fuel when it gets to the main jet.i belive that main jet in it is a 164 and the paper that came with the pipe calls for a 158 main so should i go with a smaller jet or larger to gt more gas

 

[whenfoxforks-ruled]

You are the only one that can tell us, http://www.dirtrider.net/forums3/showthread.php?t=92818. Ride your bike on each specific carb circuit, read the plug.