I have a later style Evo motor, rear cylinder has ZERO compression. Front has 100+ PSI. The cylinders were bored/honed and matched to new pistons before I bought it.
Anyway, upon my investigation, the rear cylinder has a GREEN pushrod for the exhaust, and a YELLOW one for intake. The book says it is supposed to be PURPLE for rear, and BLUE for intake, and the Green/yellow should be up front.
Not to get the cart too far ahead of the horse, because I haven't popped open the front cover yet... But if these pushrods are installed ***-backwards like I believe, would this give me the zero compression reading?
I'm guessing the guy I bought this from, who built it for me, just had parts laying around enough to call it an engine.