Still cant edit posts.... Wanted to add, you still need to do a leak down test, spraying ethel around the cylinders is only above, could be leaking at crank seal.
Well you can start by giving us info/mods on your motor and carbs (jet size is really what I'm looking for). I'm sure we can get you in the right direction.
I wouldn't get a supercub that is larger than a 4 mil, only because the reed cages are stock size and a motor larger than that needs more flow IMO. I wish I would have done a 4 mil supercub.
5 psi is ok and nothing that stands out if I heard it from someone, but there are many reasons why it could be off. Don't get worried about it, just re torque after break in.
I keep sayin it bro, but call John and ask him man! He will tell you if its show chrome or not. He's an easy guy to deal with, and will give you a better deal than whats on that site.
You must have missed this guys' post? We need all the info to determine what your issue is, do a leakdown to determine if the seal is bad. Here's the sticky thread of doing a leakdown: LEAKDOWN TESTER