Pro Circuit Pipe on the 250rr

[Hyde]

Last week I ran it with the stock muffler and it seemed softer than stock everywhere, turned out the PV 1/2 a turn and it was close to stock.
This weekend I left everything the same and installed the Scavini shorty carbon muffler and WOW, I can't believe the difference, seemed to boost power all the way through.

I have also tried the Scalvini and FMF factory pipe and the PC is best as long as you shorten up the muffler.

You gotta love it when your the only 2t red bike in the Sr A row of 40+ bikes, and the "trail bike" hole shots and leads a heard of "race ready" bikes around the course for a couple hours.

[GMP]

Do you have a shortened stock silencer to try? Makes no difference with a stock pipe, even sound is the same.