I have a 2000 polaris indy triumph 600 with a 121/15/1" track. I don't know much about sleds yet and i need some help in knowing what to do to extend my track. I don't know what pitch my track is now? and i know that i need new rails if i go from 121 to 144, and i want to know if i get a 1.5 to 2 inch lugs will it clear the tunnel and everything underneath or would i have to get new sprockets? Just anything i would need in general for extending the track? help would be appreciated