Hello,
I have a 954 and had to do a lot to get this bike up and running. so I took it for a ride yesterday to so if I could blow out the injectors and my tank knocks randomly like it’s getting a vacuum or like something is sucking the tank into its self…very hard to explain has anybody ever witness that..it is the strangest thing..I was thinking if the fuel filter is clogged or blocked would it cause the pump to over work creating a bigger vacuum hope you guys are enjoying your season cheers

 

The fuel tank cap is responsible for maintaining atmospheric pressure inside the fuel tank. Is the cap damaged in any way or maybe clogged with rust?