I have two questions:

1. What exhaust would be the best for the preformance on my 05 636~>a ti-force exhaustor a two brothers exhaust
2. I want a really wide tire for my bike...Could anyone give me some suggestions and the dimensions of a good one>?

 

peronaly I don't think there is much of a diffrence in the diffrent brands of exhaust. Some brands are a higher quality but I think that is about it. I say go with what you like the look/sound of most. In the site and sound section there is a thread with a link to sound clips of most of the exhaust for bikes.

As far as the tire goes the stock size tire is fine. Even the AMA guys who are freaking fast use the stock size tire. The only up side to a biger tire is looks. If you got a 600 stick with the 180 rear if you have a liter bike then stick with the 190 it has. Just my .02

 

What are your expectations with your ride? Track, show and tell, drag, ??? Get your setup prior to what looks good if this is the case.