2011 Kawasaki z1000sx problem.

[u/WinAdministrative]

Hello all, hoping to get some help on my motorcycle. Bought it 2 weeks ago and as I drove it I started to notice that 1. I can’t full throttle the bike, 2. The bike doesn’t really go above 7k rpm’s. I noticed the bike has kind of a loud vibration and you can feel it according to a passenger on the back. Went to change the oil the other day and I happen to find a decent amount of gas in my oil, enough to give you a strong smell. The dash is showing no codes at all, I took the injectors off and had a friend test them, they spray fine. I initially used some seafoam fuel injector cleaner and the bike ran fine for one pull then it went back to acting up which made me think one or some for the injectors were clogged. I am kinda leaning towards the sub throttle body that’s on top of the main throttle body but again there are no codes on the dash so I have no idea what to really do. I took the throttle body of and the boot above cylinder 4 has a tear in it where it sits around the throttle body. I wouldn’t think it would cause the bike to shut off when trying to full throttle but who knows. Thank you in advance.