Dude Use your tranny. Don't go to a Stealership. Remeber if you did it once you can do it agian ,If need be. ( teardown & rebiuld ) But i betting you will be ok,
My banshee was a old worn Dune machine when i bought it, That is why i think it trashed 2 gear.
I paid 2800 and then i added about 3200 to it. It's Solid Dune machine now.
It runs great but I am still tunning the 34 RS mikunis for full power. I won't push the jetting very fast so i ride and check plug and drop it every ride, I am at 290 main and looking like 270 to 280 it where it will end up.
Not sure about the washer rubber thing ? tell me more.
I ride at Siant Anthony Id.
I need to get some pics up .