This auction is for a pair of vintage polaris snowmobile motor mounts.These came in a polaris lot that I picked up a while ago. There is no polaris part number on these, there is a number on the rubber part of the mount that reads 31-2040. 

These look similiar to the front mounts used on the late 1960's machines with the hirth twin cylinder motors. Was also told after listing and selling some of these that they are for the 69 Colt with the 634 Hirth, or 744 fugi, but also used on the 69 TX 800 racers.

Mounting bolts measure 3" center to center, mounting holes are approximatly 3/8" holes and the stud is 1/2" fine thread, approx 1" long and overall heigth is approx 2 1/2". As the picture shows, one corner has been trimmed off of these these.

 If there are any questions about this item, feel free to email me. Thanks