I have a 98 polaris storm 800. I installed rail extensions to 136 track with 1.5 paddles. Still has plenty of mid to topend power but kind of a bog at engagement now. Doesn't spin the track when I goose it going slow. Was looking at clutching to increase the engagement rpm. Now it has 10/58 weights and a white or almond looking beehive spring. Currently my max rpms are 8300 which feels good and enguages around 3800 rpms. I mostly trail ride but do open her up on the lakes nearby often.