daskraut wrote: I am in process of bumping my engine up to an 1135 which uses a big-bore aftermarket head gasket (Cometic) and noted that the gasket is a one piece which will not accomodate the factory o-ring that goes around the cam chain tunnel. I filled that void up with high temp RTV gasket sealer (copper hi-temp) and shaved it flush after drying. Then my plan was to use grey Yamabond type sealer on that same area around the gasket and install. So far, so good. Then as I placed the 4 rubber o-rings around the outside studs, I noted the gasket has small holes that do not accomodate the o-rings!. This is what my plan is. I shaved the o-rings in half so they sit flush in the counterbore of the cylinder and installed them with the same hi-temp copper impregnated RTV silicone. My thinking is this, the o-rings will stay put ad not "migrate" down into the oil return hole and possibly clog the system. Tomorrow when they are dried, I will make sure they sit flush and install the head gasket with a small amount of the Yamabond type sealer around the oil return area on top of the shaved o-ring. Does this sound kosher?
That should work. I would use Yamabond to secure the O Rings instead of silicone sealer. Don't gob it all over the place..be neat with it. Put some Yamabond on the top side of the gasket around those same studs and cam chain area. Just a light coating will do the trick.
Fire the bike. Heat cycle it ONE time. Let it get STONE COLD, preferably over night, then torque the head one more time. Check the torque again in 100 and 500 miles.
