The seat on my 1979 Polaris Cobra was basically trashed. The cover had pulled back from the base which is a pretty common problem, and the sled had been left outside. That had caused the foam and wooden base to get totally saturated with water. I let it sit near the woodstove for a few days which got it basically dried out but the wood base was totally ruined. So I got a sheet of 3/8" plywood (which will help me with the '70 Ski-Doo as well) and cut out a new piece. Its actually a fairly complicated shape, it needs to fit around the light assembly at the rear and then around the lip that holds it up front. Plus there need to be two holes to attach at the rear. I painted the whole thing in a thick coat of black Rustoleum which makes it look original and should protect the wood. If I get another 30 years out of it I'll be satisfied. :)
The original base was molded into the foam so getting them apart without destroying the base (which I needed for a pattern) took some doing. When done I'd cut the foam in a couple places. I glued those back together and then glued the base onto the foam to keep them from sliding apart. Finally I wrapped my new seat cover over the top and stapled it to the base.
I bought the seat cover on eBay and I'll warn you that there are 2 versions, 1 is black, one is blue. I didn't notice that until I'd bought and received the black one. The original cover was blue. At this point after I'd cut the cover to make a hole for the taillights I'm not going to spend the money to get the correct one, after all it gives me a story to tell.
Anyway, once I get the rest of the sled completely ready (which means fixing the ski that only makes right turns) I'll mount the seat, but at this point I'm so close to being done I can taste it! If we only had some snow...
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