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Honda trx450er engine hesitation


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I have a 07 trx450er. When I punch the throttle, it falls on its's face. About put me over the bars!!!! Then it will take off after the puke. It doesn't die, it just doesnt respond. The bike is stock except I took out the spark arrester. I'm at a loss. Any help would be great.

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well first of all when you took out the spark arrester did you adjust your jetting? if you didnt i would say you are too lean. if its cutting from idol to 1/4 throttle ist you slow jet. 1/4 to half it would be you needle. a buddy of mine pulled the arrester out of his 450er and we had to rejet. he also has had problems with valve adjustment.

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