my bike seems to have problems

OK so I rode the other day and had problems starting it when it got hot. I let I cool off and then cranked it and rode it to the shop. I noticed my fuel screw was missing. Got one of those and now it won't start at all no matter how I set the screw. Then plug might be fouled completely I didn't have time to check. But would a fouled plug make it feel like there is no compression at all? Or is it time for a valve job? Its an 09 kx250f

no the plug wont affect compression.


You need to check valve clearances and valve timing 


best to strip and clean the carb also

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