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OK, long story short-
I bought a collection of CL350s and one CB450 frame, intending to chop them all. They grew on me. Big time. Now I have a little mild custom project going on one, basically mechanically stock, minimized electrical, stripped to necessities. Cleaned carbs, after which it ran good. Shortly thereafter, it would idle fine, but if I revved it, the motor would just run away and not come back down, so I would have to use the kill switch. Now, as soon as it starts, it heads straight for WOT, and I have to shut it down. What gives? Please, for the love of GOD, don't tell me I need carb diaphragms. Sorry if this is a rookie question, I'm just confused. :x
 

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Assuming the throttle cable isn't hung up, You have an air leak somewhere (usually the rubber intake manifolds)..... Steve
 

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check your timing advancer as well?
 

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maybe a dumb ? but does your carb use a slider? My cb200 did the same thing after i rebuilt mine. If you have carb sliders, make sure they are facing the correct way, check the screws for idle and mixture, maybe they are out of wack?...
 
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