Posting a pic of your kart' would be sooo helpful.There was a learning curve for me as wellI raced/built just about everything and it didn't make sense to me either.Having a fixed dimension for the belt is the most common configuration.The driven in the #14 post went completely under the motor and the part not shown does have slots. I drilled additional holes over time as the part was used on other type karts. The belts are designed to have a small amount of slack when installed by pulling the clutch bell and sliding the belt over the bushing on the crankshaft.You mention whiplash-many things can cause this-incorrect belt size of course, weak/stretched springs in the clutch,weights wore down,rough pulley surface,the lack of dry lube, bushing missing on crankshaft. The driven unit can have the same issues as well. We can definitely get your CVT working correctly.
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