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No vacuum at carbs..

L

Laz

Forum Newbie
Sorry for creating a new topic, tried googling and searching the forums.

1979 GS550 with VM carbs. I cleaned the carb, did pods with stock jetting and AIR correction jets.

It's idling crazy high. I think the carb is way out of sync. I don't know where the throttle stop should be tuned too eathier. Does anybody know how many turns the pilot air should be turned out? I did two. Additionally I hooked my carbtune to the can, and I'm getting zero vacuum. What can be causing that?
 
This is how I have it hooked it up.. I'm almost wondering if I'm when doing it right lol
 

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Do you have the sync lines attached to the float bowls? If so, that's your problem...
 
Laz said:
This is how I have it hooked it up.. I'm almost wondering if I'm when doing it right lol
Click to expand...

No wonder you don't have vacuum

See that socket/Allen head bolt between the carbs and the head?
Unscrew that and screw in the 5 mm adapter from the Carbtune.
Attached the #1 hose, with restrictor, to the adapter.
Repeat across 2, 3&4

What did you set the pilot fuel screws to?
2 turns on the pilot air screws is about right

You cannot sync the carbs with the fuel tank in place
 
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