Skidoo® has had a problem with their hollow drive shaft. The welds on the power side are breaking and stranding many snowmobiliers, including the owner of Avid Products.
Our local dealer sold 130 sleds last year. They had 25-30 shafts break. Skidoo® replaces the shafts under warrantee, but they are the same design. We have come up with a fix that will give some redundancy and reduce the loads on the power side of the shaft.
Drive shafts are under tremendous loads when a sled is working hard. Not only in torsion, but the shaft also has to flex forward and backward as the suspension goes up and down. There is only about .375” overlap between the outer piece that is splined and the center assembly. There is a lot of load going thru that one spot.
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