Thanks for the replies and great information, everyone. I honestly like to go fast in pretty short stretches and not really interested in doing 100. But 80-85 like it was set on fire would be awesome! I must say, when some of you guys mention the helix at 80 degrees or whatever, I AM LOST. Lol. I understand the basics of a sled and I can rebuild the motor if properly motivated. But when it comes to gearing, clutching and jetting.....I am lost. I would really like to do the upgrades myself, because I can only imagine what a mechanic would charge for this type of work. I assume I need a clutch puller at the very least, then what about the secondary? If I make modifications to the primary, will the secondary be the weakest link? Also, any recommendations for gearing would be much appreciated. Thanks!