I have an '03 ZX-9R that I just purchased. The guy put on a Yosh slip on but did not jet bike, only has 1600 miles on it. The dealer I bought it from said he will pay for parts if I get it jetted. Bike came from NY and now is in CA so runs a little rough due to altitude and humidity change. Bike meets CA emmission standards though. I can buy DYNOJET stage 1 kit for about $95.00 but how hard are they to install? Dealership wants around $300.00 to do it. I have a friend who does his and said he would help. Any suggestions....should I just pay the $$$$ or do it myself? Any tips from anyone who has done it before? Thanks.....