Seriously Ben, I put PCIII on my bike, then gearing then along way down the road added a slip on. the

PCIII w/ custom tune made the throttle response and torque really smooth, next I added a -1 front sprocket for more aceleration rode that for a while

then added +2 rear sprocket and Speedohealer. that lasted one summer then i went back to stock rear sprocket. the +2 rear IMO was overkill on the liter bike but -1/+2 or a -2 front (steel sprocket is smart if going down 2 up front) is ALOT of fun on a 600. but IMO w/ a aftermarket exhaust the higher revs from the lower gearing can wear on you if you ride all day. especialy high reving 600.

slip on exhausts add a very few hp, and on a everyday ridden street bike, it seems like the cops let you have alot more fun if you keep the stock stealth exhaust

you will be happier with the way your bike rides from pciii & custom tune, along with lower gearing. slip on exhausts are only loud they dont do much for the way the bike runs

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Thank you. I think that was the answer I was searching for initially. When you say that the aftermarket exhuast can "wear on you", do you just mean in terms of volume? Also, this is really going to show you how little i know, but how exactly do the sprocket mods work? What are the mechanics of it? Once again...I appreciate the responses!

I am thinking about buying the 2008 600rr but the only exhaust you guys talk about is akra and two bros. Are the kr tuned exhaust any good?

i cant speak from any experience on the KR Tuned because i have never had one or knew anyone with one, but from what i have read on them i wouldnt suggest one to anyone. from what i have heard on them they are cheaply made with bad welds and are way over priced for what they are. again i have never had one is this is all from just what i have read on them. if it was me i would look for something different.