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Old 03-16-2008, 08:42 PM
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Pablo Pablo is online now
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Join Date: Dec 2007
Location: Duvall, WA PNW
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Default Re: Brainstorm 2-stroke bogging with me....

OK I just came in........arrgg.....this is getting fun.

All the outside fiddling hasn't helped. It started to backfire through the carb every so often (clue Norman?) so I decided to attack the beast.

First of all I took the carb off and took it apart. Pretty simple really (yes Norman the O-ring was still there). The main jet appeared clear. I didn't mess with this:

http://motorbicycling.com/attachment...arbpict014.jpg

Should I try messing with the float???

Put the carb back together. Then I took the manifold off. Found a big oops there....I didn't realize how lousy the gasket matched the engine. A big portion of the ill fitting gasket was being pulled into the engine. So I carefully cut the gasket to fit.

I put a new O-ring in and buttoned it all up with a little sealant.

It fired right up, sounding really good, nice midrange power....but go for full throttle and BOOOOOOOOOOOOOOOGGGGGGGGGGGGGGGGGGGGGGG......

Dern.

So far I didn't mess with the needle.

Quote:
Originally Posted by deacon
It is possible you got all there is out of it.
Something is fundamentally wrong.

Quote:
Originally Posted by Bikeguy Joe View Post
Try one notch lower on the needle clip and see what changes.
I just did and it made it worse. That should make it richer. Indeed it did. So next I will try the top notch, I guess.
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