83 Honda CB 550 SC discussion forum:

RE: I need a vacuum diagram: or some help w/ it

RE: I need a vacuum diagram: or some help w/ it

Les said 2009-01-01 01:13

The two vacume lines are not really listed in the repair manuals, but what they really are are breathers, just put a short [2-3 inch] hose on them and let them droop down with the ends open. If you plug them the carbs will vacume lock and not flow fuel. I found this out the hard way. I know it doesn´t make any sense but it works.
The vacume diaphram I assume the one in the carb.? That will be a dealer item if they can get it, you may have to get another set of carbs to be able to find one to use.
Good luck Scott. Les [just an old Honda man]

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