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I was wondering on if I run VP ultimate 4 race gas I would have to jet up or down and how much?Thanks
 

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you should go up a couple sizes in jets. i run ultimate 4 in my 450 and im running a 170 main and its runs perfect..i tried a 168 and a 175 and for me the 170 did best..the power you will get from the ultimate 4 is amazing..

i have my baffle out also, so if your all stock the 168 and the ultimate 4 may do you good..
 
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