ok so. when the bike is cranking over slowly, I can hear air coming up the small hose below the silver valve(that hose is connected into a 'T' piece which sits under that hose).
When I put pressure on the hose and push the hose out towards the exhaust a bit more(towards me), then I can no longer hear air up through that hose, until I let go of the hose and stop applying pressure on it and let it sit in it's normal position, where the air sound comes back almost immediately.
Air is definitely escaping though, because I can feel it escape when the bike is running.
When I put pressure on the hose and push the hose out towards the exhaust a bit more(towards me), then I can no longer hear air up through that hose, until I let go of the hose and stop applying pressure on it and let it sit in it's normal position, where the air sound comes back almost immediately.
Air is definitely escaping though, because I can feel it escape when the bike is running.
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. Maybe it is just the approach you have used and what seems a lot more convoluted than what I am used to that is throwing me, but I will venture one more guess as to why your plumbing hisses. If by applying pressure to the hose you mean you are bending it out straighter, that could mean that the line is less pinched off and the restriction that may be making the sound is eliminated.