Quote:
Originally Posted by rwl6935
I'd mod mine but gutting the cat and patching it will make the bike louder but probably won't add much performance wise since the bulge in the pipe will cause turbulence which will raise the back pressure.
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When you see what the catalyst looks like, you'll understand how restrictive it is. Simply gutting the cat and patching it will provide a noticeable improvement, although you'll need to increase jetting to compensate. Honestly, any turbulence or stack-up due to the bulge would not likely be measurable with these little motors. Gut the cat yourself and save the cash for another mod.