w/ a slip on its not needed but it depends on your intensions for the bike for track days and racing i would do full system and p/c V but just for normal riding and tooling around a slip on will do just fine my g/f has a 05 zx6r and the best thing i did to it was a -1 front sprocket i feel thats how they should have been geared f/ the factory
This is some good advice. I bought a power commander but had a tune sent to me after i did all my other mods like the exhaust and intake. It turned out that the company that I bought my exhasut from has a dyno in house and has dyno tunes for most bikes so I bought my PC from them with an uploaded tune. It actually runs a lot better with it and I could tell a back to back difference.
It did however, not add as much power as i got when i re-geared as rmallen said. I did a -3 in the back wich is close if not hte same as -1 in the front and saw a huge increase in the low end power curve. I may even still do a -1 in the front as well to see how I like it:thumb:
For my, the exhaust was a really hard choice because I had a color scheme I was trying to stick to. So i had to pick something accordingly. As far as the Yoshi vs. Two Brother, you really cant go wrong with either if you like them both.
