Coleman CT100U-A help

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Pete1burn

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Jun 2, 2022
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Hi all. First time poster.

My son has the bike listed in the title. Starting a few days ago it started running ultra rough. It starts up but the idle is very jumpy even with some throttle added, and it's throwing a lot of white smoke out the back.

I swapped the plug with an NGK and changed the oil. No difference. Do I need to replace the carb or does this sound like a bigger problem, maybe with the engine?

It's been ages since I tinkered with engines so any help would be appreciated. Thank you in advance!
 

miniriders

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Hi Pete, I wish I can help. Any updates on the bike?
 

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