Hello all, new member to the page here. I have recently acquired a 1975 CB360. When checking the ignition timing, the marks on the rotor seem to be off. When at TDC on the compression stroke of the left cylinder, the T mark is lined up. And vice versa, when the right cylinder is at TDC (verified by watching the intake valve open and the piston rise to TDC) the LT mark is lined up. I'm thinking someone put the cam in 180 degrees out, but I'm not sure. The bike will idle, but it is rough and almost sounds like it is after-firing thru the exhaust. I really appreciate any help, I've been searching this and other forums for weeks now, trying to find any clues as to why this is happening.