crf 450 starting issue again !!

hi guys so i rebuild my 07 crf 450 new crank, piston, plug every thing had valves re shimmed bike started great 1st or second kick went out on it was all good.

took it out 2 weeks later was ok when first started it but once it warmed up was a rite pain to start it went from one or to kicks to 10 to 15 any ideas cheers 

Go and check the valve clearances, from your explanation of the rebuild it seems that no valve job or new valves happened, is this so?

17 minutes ago, wingman111 said:

Go and check the valve clearances, from your explanation of the rebuild it seems that no valve job or new valves happened, is this so?

didnt have new valves just shims i was thinking maybe it was  jetting thanks for the reply 

valve Clarence are in spec

If you haven't checked them since it won't start check them again, they can change quickly when worn out.

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