I kno its a dirt bike.. but my bro needs your help. He kick starts it and it runs for like 2-4 seconds.. gives it throttle and it dies out. It does this ALL THE TIME now for some reason.. do you know why and how to fix it?

 

time to clean the carb. alot of times a peice of crap will clogg the jets and only let enough in to keep it idling but once you give it gas it takes in alot more air and not much gas so it dies. thats my best diagnosis

 

will it run with the choke on...if so then yeah...clean the carb