[braddbry]

first of all like to say hey to every1, been riding about a year now and going to start racing in the new season and get loads practise when i can, but need it to run right, so i resently shimmed my valves put it all back together and it started second kick, and first kick after i took it out and had a lap or two cut it out and from then on it wont start? would bump but now when i kick it seems to try fire up but cut out str8 away??? no idea, at all any1 help me

[motosicko]

Time to recheck your valve clearance. After they start to wear and need re-shimmed they can go away quickly. Check that first and get back with results. What bike are you on?