Hello
I went for quick ride last night, but had to cut it short because of the engine not running well. The right hand cylinder was banging in the pipe, and the bike would be difficult to start. At home I fitted new HT cables.
This afternoon the bike still behaves the same. New plugs and a clean of the slip ring might have helped a little. But still the right hand side pipe smokes a lot. A compression test reveals even compression of 150 psi. The oil tank might have been generously filled, but after draining the sump there is no improvement. When I remove the plug from the right cylinder, smoke oozes out, not so in the left hand side cylinder. So I guess there is oil in the right hand side cylinder, but from where? I would think that if the compression is the same both sides, the rings would have to be fine (or equally bad). The bike has been running great for years, so nothing assembled wrongly. Can oil collect in the cylinder and then stay there until it is burned, i.e. an overfill that just have to clear itself? The valves are adjusted, and none of them off. The bike starts easily with fresh plugs.
Puzzled!