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02 crf450 starting problems

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After riding for about 20 minutes , stopped for 5 minutes then just wont start.This happened at least 3 times. Also explain the hot start lever operation. Thanks for any input and info.

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Do you have problems starting it when its cold? You'll hear a lot of guys say it's a valve problem, which it may be. Pull the valve cover and check your intake clearances. Chances are they're too tight.

Hot start opens a passageway in the carb so you bring cool outside air into the engine. The helps with starting when it's hot.

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my o2 had streched the valve stems. the more we adjusted the valves the worse it got. change to stainless valves and ti springs. worked like a champ. hope this helps.

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