I have a 1997 Formula 500 that was just given to me. The only problem with it is a spring inside the recoil that breaks every second or third pull. Apparently this part was a recall back in 97 but don't quote me on that. The rest of the sled is mint condition, but this spring keep breaking every second or third pull. I buy the spring from my local Ski-Doo dealership but it breaks as well. Any thoughts?