by KevinM » Wed Feb 28, 2007 6:58 am
Adding a pipe that breathes better will cause your bike to run leaner. If you add an aftermarket pipe, consider adding a larger main jet to the carb. Maybe one size up.
As far as what pipe... FMF worked great on my sons CRF70. I've seen some on 150Fs. I've also seen guys running BBR pipes and they had no complaints. But they're also bored and stroked to the hilt...
09 CRF 450R
07 CRF 250R
45 plt /175 main /JD Red-5th pos
FS 2 trns
05 CRF 250X
42 Plt /162 Main /JD Red Needle- 5th pos
CRFsOnly Fuel Screw 1-7/8 trns out (2 turns winter)
TwinAir PowerFlo Kit /Opened Airbox /White Bros E2