by krisrtch » Wed May 28, 2008 5:20 am
I have the 08 450R I put a full FMF megabomb and 4.1 system on it. I purchased the FMF jet kit and started with their recommdations and have since played around with the main jets. I ended up running a 170 main with their neddle on the 5th clicp. I still need to go down on the pilot as the stock one is way to rich. I can turn my fuel screw completely in and it doesn't even phase the engine. Still sits and purrs. Alot will depend on your alt and temps you ride at. I'm at sea level and 50 to 100 degrees. I know another guy with same bike and exhaust and never changed a thing jetting wise and it runs just fine. It's one of thos trial and error type ordeals. I'm am currently awaiting my pilot jets to show up.
There is plenty of time to sleep when your dead....... Ride Hard!!!
2012 CRF450R
2010 CRF250R
2006 CR85R
2012 CRF50F