29-04-25, 05:07 PM
Sounds like classic metering valve/s sticking and the pilot circuit in need of a clean. As mentioned don't worry about the the intake rubbers, I've personally not as yet seen a set split/cracked all the way through and I've worked on many Fazers. In fact most bikes crack some worse than others, most get stiff/brittle they can most times be softened, biggest issue with them is when stealers/DIYers don't fit the carbs back correctly deform or crush them, they're buggered then.
Later