What side does the thicker seal one go on? Does anyone have any kind of video how to install them. I install both sides in 2012 but never used motor. They were bad when motor arrived . So they sent me new ones free of charge. I took them out before they came. I guessed on which sides . So now I'm using it , don't like the way they fit. Plus its revving higher now. Its looks like magneto side is got a little slice in it. I'm also asking where to purchase them?