Hi everybody, I am about to start a 2002kx500/2012 kx250f conversion.
I race Hillclimb so need all the power I can get. The only thing on the build I worry about is using a cr500 exhaust pipe. The motors, port timing, compression,etc are very different between the two motors and I don't want to lose power putting this motor in an AF. So I guess the question is for everyone if you have used a cr pipe what was the power loss or performance loss, how did the power and change? Which pipes produce the best HP gains? I have looked at CPI And scalvini which both seem to produce best numbers.
Thanks