02 crf450 starting problems

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.

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.

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.

Any other suggestions ? Thanks

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