Hey guys, I'm new around these parts and I can use some help. Recently starting riding and I decided to pick up a project over the winter, 72 cb500 with a 75 cb550 motor. The bike was running 4 years ago, but the guy I bought it from said it worked for about 45min then lost compression on 1 and 2 cylinder. Don't have a mechanical background, but thought there's no better time to learn than now and the price was right. With something like this where would you guys begin looking at then what direction would you go? What's the simplest thing it could be and what's the worst. Thanks.