I am having a problem with chain slipping around the gears in chain case. Would anyone know of a better way to tighten this chain up? I am setting up for ice ovals, my 3rd year. I made some changes this year to be more competitive. I have changed over to 38 mm carbs, polaris Primary and secondary, and running 19/39 gears with a 66 pitch chain. I tried a 64 pitch and it was to short. Thinking of drilling a hole thru chain case and adapting a polaris like tighter. Any thoughts? The other thoughts was to make a threaded rod like mechanism between the two pucks?