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Hi folks,
I was wondering if someone could tell me where the vacuum line that comes off the intake at the front cylinder goes? I can’t figure it out. There is tons of vacuum there so I’m sure it hooks to something. In a parts book i seen said it was vacuum (vent line)
Any help would be great thanks.
 

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It goes to the boost sensor. You remove it to sync the carburetors, then reconnect it; bike won't run well without it.

The boost sensor should be next to the fuel pump, under the left side cover.
 
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