Hello to all, I’m writting this from frickn cold Speedway Indiana. I was turned on to this site by my two good friends Brian Robson and AJ Noud. I have been racing yamahas since 1987 and I think it’s great you guys are considering it for a class. The KT 100 is most “durable” with a ssx package with a Horstman HDC 5B clutch for seniors and a HDC 5A clutch for juniors. Both clutches are dry the only difference is the A has 1 disk and the B has 2 disks. With these cluthes you could race up 5 weekends with little to no matinence after that you would only need to change the disks to keep the air gap close to specs. These clutches are damn nere bullet proof. The ssx set up is much more driver and chassis involved meaning the set up and driver need to make as little mistakes as possible. We generaly have 6 to 10 guys running nose to tail for 30 laps. If you decide to run the pipe set up you would need a whole slew of pipes, flex’s , gears, plugs, and clutch maintence parts and tools, like BR said, but the pipe is much faster in a straight line. I would be glad to answer any questions anyone has to help guide you through your endevor. The KT’s are huge out here with the entrys bringing in about 40% of classes. Good luck .