I've bought a set of HTG pipes to my 97 storm, someone having an ide whitch jetting to use. Do you guys put bigger jets on your snowmobile when you put aftermarket pipes on it ?
My sister added a set of triple pipes to her Viper, and she uses smaller jets than stock, is it the same for Polaris ?

I have always heard that you bump up to sizes bigger on the mains, then do necessary plug checks. I would find out the number of the manufacture and call them for the settings. They should be able to help you out. You may need to do some clutching mods also. Good luck. SWRules

you want to go up at least 2 sizes on the mains better to be safe then sorry. then work your way down till you have a nice wash on your piston crown. as far as clutching goes you will ned to add some weight to it also.

yammies jets are numbered diffrent from what i hear. thats prolly why thier smaller!