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'79 cb750k vacuum question.

cbsavage

CB750 Enthusiast
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Where dose the carbs get vacuum from? I got this bike that's been sitting outside in the weather since 2002. I cleaned the carbs and getting ready to put it back together and wondering if there is a vacuum hose or something that is attached to the carbs.
 
Where does ANY carb get vacuum from?, the motor of course.

No vacuum hoses at all on that year.

Most major issue there will be was the intake/airbox water tight enough to never let any water leak deeper into the engine, if so it may be junk.
 
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