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Discussion Starter · #1 ·
I have an mc19 cbr and the petrol doesn't seem to let fuel out on any setting, I have taken the petcock off and everything seems fine and I have used compressed air to see if anything was blocking the tank from the inside but nothing, would appreciate any help I can get.
 

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Yeah, make sure vacuum-line to petcock is not cracked or disconnected.
Can also test petcock by manually applying vacuum.



If fuel flows from petcock without vacuum, it's broken. Should only flow when vacuum is applied to smaller nipple.
 
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