I have a 1963 Allstate with a new 2 port 150 cc top end upgrade. This included the cylinder, piston, wrist pin, rings, and head. The engine was broken in as per the Allstate manual not exceeding 30 mph in 3rd gear for the first 1000 miles. The bike runs great. It starts on the first or second kick always, revs fine, and has good torque as judged by the seat-of-my-pants test. The bike responds well and is smooth and even throughout the throttle range. Overall, it is a pleasure to ride.
I have checked the compression with four different testers and all read about 70 psi. By all standards, this is too low. However, the engine runs great. Would it run better with more compression? Should I be concerned about the low compression tests or ignore them and ride on.