longshot
Extreme
Just received a set of p/n 504152503 and noticed a dished out portion on only one side of each driver on the involute drivers. Spoke with skidoo and the dished out portion should be to the outside of the track. They desiged it this way in case any of the track cleats were a little raised. The newer design is dished out on both involute drivers, but I have seen several postings in which the Yamaha guys have received the older style drivers like I received and did not know which way to install. In looking at my aftermarket track, the cleat crosses over both involutes so the new style might be a better choice if available. Hope this helps you guys out.
Jack_Shaft
TY 4 Stroke Junkie
Quality info, thanks for the post.
