1990 kdx burvle, stumble off idle, Rb carb

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1990 kdx burvle, stumble off idle, Rb carb

Postby El Gran Jamon » 11:09 pm Jul 28 2016

Hi,
Finally got my ked running ok, fixed bad vendor's stator. Runs well except..

Has a burble, stumble off idle, then immediate power hit. Has rb carb splitter in it, 42/150 jet, 7/8th out. Was hoping to play with air screw and cut burble out, no luck yet.

Fwiw the bike when cold runs well (no choke) no burble until heats up

Thanks
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1990 kdx burvle, stumble off idle, Rb carb

Postby cornishwrecker220 » 05:24 am Jul 29 2016

Bike sounds a tad rich.... Check the air filter & spark plug colour also air screw set to 1.5/2 turns out , you could try going up a clip on the needle ( leaner) or perhaps dropping the main down to a 148 .
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Re: 1990 kdx burvle, stumble off idle, Rb carb

Postby El Gran Jamon » 10:05 am Jul 29 2016

Thanks,
Don't think the main is the issue, it has the rb carb mod and recommended 42 low speed jet. The recommendation was 7/8 out on screw, but I could try more . (Remembering it works opposite a 4 stroke so further out less fuel)
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