I've made several sets of tracks for Hus-skis and one set for a Waywego. The 101-1/4" dimension that 65tomcat said would be the total length of the track counting the lacer (27 cleats at 3-3/4" center to center). You need to subtract the space that the lacer takes up, probably about 1/4", so your 101" length would be close. I always left the pieces of belting a little long and cut them to work with the lacers that I was using. In my opinion, you would be best to reuse the original lacers if you can. I've used the alligator lacers and they worked ok with the stock engines, but the one I have with a 13 hp Honda engine, kept tearing them out at each end of the lacer. I switched these tracks over to the original lacers but used machine screws and self locking nuts instead of rivets. Some people go with the original style rivet, but I wasn't worried about originality. The first set that I built, I used 3/8" belting because that's what I had. Since then, I've been using thinner belting, about 1/4". It seems to me that the thinner belting takes less power to turn and when you're dealing with 9.1 hp, you need all the help you can get.