Hey guys, After putting the engine back tougher (replaced piston rings) and putting all back in the bike, when i started for the first time there's an oil leak from the rear Cylinder base gasket, apparently it got distorted somehow during assembly and i didn't notice. i really don't want to take the engine out again, is it possible to replace the gasket with the engine in place? i thought maybe to take out all the mounting bolts and tilt the engine down using the swing arm shaft as a pivot (all carbs,fuel tank etc removed) can this work?