what is the diference between the pipes offered by yoshimura? (std.,race,pro) I am going to get a slip on but would like help on which one to get. Jetting help would be helpful too.

 

The only difference is weight.

 

Dirt Wheels just did a report in the November issue on the slip on. Yoshimura says to go up one size from the stock main jet which is 150. It was the rs-3 slip on they tested. It weighs 4 lbs compared to 8 of the stocker and they said it gave about a 3hp increase. I have seen 400's with them on and the sound pretty nice, not as loud as the wb e-series, but pretty close.

 

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