I wonder why tekno went 15-44 spur gear clutch bell gear ratio instead of 13-46, and why are the outside bearings on the 15t clutch bell different to the bearing used on the 13t clutch bell or any other clutc bell for that matter. When your running both buggy and truggy it would be good to have the same parts interchangable especially clutch bell bearings. Had a clutch bell bearing fail on the buggy went to use one of my truggy bearings and it was to small so my day was done. They make everything virtually interchangeable between the buggy and truggy and the the most simple common part that should be the same are different i can't understand why, its not even a bearing size that any of my other 100 clutch bells use.