WetVertical

When I parked it in the garage it was running great, slight ticking from the timing chain, which i checked the cams with a feeler gauge at top dead center intake was within spec 0.10 slight drag on exit, and the exh was 0.20 in spec according to what I read for the specs. I did a spark plug change and oil, checked for Spark has a strong spark. 

But the compression test yielded roughly 30 PSI factory spec is 142 PSI.

I recently did an oil change and spark plug replacement on my quad, and it wouldn't start immediately after changing the oil. I did a compression test and had 30 PSI. what could that indicate? I also do not have a leak down tester.