Im looking to upgrade my stock exhaust to an aftermarket exhaust. Where is the best place to buy on in the lower mainland? What are some exhausts that would fit a Suzuki GS500F? I'd also like to change the angle of the exhaust to make it point upwards a bit more, has anyone done a job like this in the past and could give me some information about it. Also I have a rear tire size of 130/70-17, could i fit a wider tire on this bike?