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Brute popping in carb and a little backfire?

gman-brute2010-08-11 17:51:16 +0000 #1
Hi everyone ive just bought an 06 brute 750 and it has a slight pop coming from the airbox every once and awhile, and backfires a little through exhaust..it has the dynatek cdi and uni filter. ive shimmed the needles with one washer apiece and thinking i may need to bump pilot up to 40. it has a very slight stumble at 1/4 throttle id say..any help appreciated!! thanks

Brute popping in carb and a little backfire?
RDs Neighbor2010-08-11 18:06:31 +0000 #2
I have been fighting that for a year. 38 too lean, but 40 is two rich. Going to the 40 will probably fix it. But I bet you find it is overly rich on the low end. My bike runs rough untill it warms up but is not to bad. If you do decide to go with the 40, make sure you get a high flow air filter, a high flow pipe, and if you snorkel it, use the 3" pipe all the way up, and you may create enough air to satisfy the 40. Obviously you will need to adjust the rest of the carb for the additional air.

I have a HMF Utility in great shape that is about a year old if you are interested, if you don't have a pipe. I am asking $150, and will split the shipping with the buyer anywhere in cont. US. PM if you are interested, and good luck with the jetting.

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