YOU CAN DUPLICATE A GASKET USING NOTEBOOK PAPER AND WORKS WELL, SIMPLY RUB A LITTLE OIL ON THE BACK OF THE ENGINE HOUSING, (BACKPLATE) HOUSING, (CRANKCASE)-AND PLACE A PIECE OF NOTEBOOK PAPER OVER THE OILED AREA AND IT WILL MAKE AN IMPRESSION OF THE GASKET, SIMPLY CUT OUT GASKET AND INSTALL!!! OR YOU CAN USE SOME BLACK SILICON,WILL ALSO WORK FINE!!!