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Carb sync help

jasonmac76

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If the petcock needs vacuum to work how do I run the bike while syncing the carbs if I'm using the petcock vacuum line for carb 2?
 
On the RC04 engine and carbs, there is a dedicated vacuum point on the carbs for the fuel valve mounted to the carbs. The sync meters use the 4 vacuum points on the engine head above each inlet.
 

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Should have mentioned it's a 93. The petcock uses the #2 carb vacuum spout to feed the fuel. I guess I'll just hook a shop vac to it for adjustment.
 
splitter wont affect reading as long as the petcock isnt leaking vacuum. Dont know about you but I wouldnt be using a shop vac around a possible source of combustible fuel.
 
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