Join Date: May 2019
Location: New England, USA
No pro here, but I probably wouldn't run a stock map with a 3/4 system for a long period of time. My bike, like your friends, doesn't have much vibration in it either, especially compared to my friends GSXR1000R, which has a TON of vibration comparatively. My thoughts are similar to the last reply, that your new system coupled with the stock map is making things rough on the motor, and that you should correct the issue soon before it potentially causes more serious damages. I suspect that the tires you put on are going to play little to no role, presuming that you're getting vibration at 4K RPM regardless of whether you're rolling or not. If it were being caused by the tires I would think that you would feel it more exclusively in the handle bars and front end, even with a steering dampener. By the way, did disconnecting the exhaust servo throw any codes for you when you did your cat delete?