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I just installed the power up kit in 03 crf150f with 115 main and the bike starts fine but will not even rev up at all. It has FMF exhaust with snorkel removed from air box.Tried adj a/f mixture . Any suggestions would be greatly appreciated. Trying to get it going so my son can ride this weeken

Did it start and run fine before you changed jetting?
What position did you put new needle?
How old is fuel and spark plug?
Breather tubes not kinked?
Is the plug lead on properly,can get displaced when pulling tank off to get to carby.

Hope that helps