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Good day Folks...

Having issues with my 1969 CB350. The left side Carb. blows raw fuel out the air filter side while running.? I've rebuilt the carbs set the float heights etc. (and the bike stumbles and misfires)

Worthy of note: This problem just appeared. The bike ran flawlessly all summer long. It developed a small misfire on the left side cylinder prior to this issue. I figured it was dirt in the carb which the reason I rebuilt it and cleaned all the jets emulsion tubes etc. Float height is set at 26mm which is where it was prior and ran fine. There does not seem to be any issues internally in the carb?

Why would raw fuel suddenly reverse out the carb?? Intake valve not opening / closing properly??

Any help or direction would be appreciated.

Thanks again folks..
Paul
 

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I would think the only way you can get raw fuel out of the carb would be an open or damaged intake valve on the compression stroke. Why not do a compression test ?

BILL h
 
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