FWIW, Cometic makes a base gasket. Plug and play, leak free, and should be reusable. No worries about blocking the oil drain hole with sealing compound, and should release easily if de-construction is necessary. I used one on my primary, had it off twice for routine maintenance and still seals fine.
Pete
I use Permatex Ultra Grey on everything that doesn,t use a gasket including crankcase, carb flanges and base of barrels, a 6-8mm stiff brush to apply in an even fashion and it gives you plenty of time to assemble.
It's the Threebond that's sealing your barrel, despite the gasket.Four bikes so far including an 850, all paper base gasket with 3bond on both sides, no leaks. Can't believe it would reduce the compression enough to notice. Have tried to remove gearbox covers and timing covers after using 3bond on both sides of a paper gasket. Had to beat holy hell out of them to get them loose.
If you have a gasket fitted you really won't need any sealent just grease on the gasketFour bikes so far including an 850, all paper base gasket with 3bond on both sides, no leaks. Can't believe it would reduce the compression enough to notice. Have tried to remove gearbox covers and timing covers after using 3bond on both sides of a paper gasket. Had to beat holy hell out of them to get them loose.