I've watched some videos on how to do this. I'm a bit more confused. I can get up to finding TDC on compression stroke. Can I adjust all 3 valves- 2 intake and 1 exhaust at same time? It's compression stroke and all valves should be closed. Then rotate crank to second mark for rear cylinder and do the same? Am I correct? I'm a new owner of this bike and first time doing this, dont wanna muck it up!