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Post by walleye1963 on Jun 13, 2015 13:17:44 GMT -5
Hi guys.I just put on a 72cc bbk.when I start it up cold and its on hi idle it will serge.it will be on hi idle then go to almost to a stall.then catch itself and go back to hi idle.it will do this until the hi idle shuts off then it will idle great.I have a 20mm carb with a 85 main jet in it.it did the same thing before I did the bbk.what can it be? Do I need a bigger jet or is the a/f mix off? Thanks for the help.
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Post by 90GTVert on Jun 13, 2015 17:46:50 GMT -5
You can try fiddling with idle mixture and speed settings, but if it's fine other than initial starts I would imagine it's your enricher working.
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Post by walleye1963 on Jun 13, 2015 19:17:09 GMT -5
Will it do that?soon as it worms up it runs good.iv noticed that sometimes when I go some place and let it sit for a few I have to give it gas for it to start. Is that normal for a bbk?before I put it on I'd just hit the start bitten and it would start right up.is that because it has more comprsin. It has a 85 main jet do I need to up it to a #90?
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Post by 90GTVert on Jun 14, 2015 6:03:36 GMT -5
Do WOT passes to figure out your main jet. Don't swap it out because of starting issues. I'd suggest a full tuning process if it has not been done. www.youtube.com/watch?v=K5j8gHg5kMc |
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