Anybody try a Yoshi slip-on with an '06 F4i yet? I have the O2 sensor plug so that end is taken care of. There is a sleeve that seems to be crimped to the collector with the gasket over that. This sleeve plus gasket makes up for the difference between the collector diameter and the diameter of the Cat converter. Does that crimped sleeve come off? I hit it twice and it didn't budge. ??

 

I have a Yoshi pipe on my '05 F4i and it's great. Remove that gasket thing, you have to pretty much cut it off.

I will keep the Yoshi until Micron or Two Bros puts out a GP style exhaust for this bike.