I'm a little confused,too. If the compression reading is taken at the cylinder, how would a loose intake affect readings?
I had a few VW's in the late 70's- early 60's to about 1970 models. Did a little hot rodding to them, but the factory crankshaft has no counterweights and was limited to 4000 rpm. Good cranks were available, but not to my budget!
I'll bet that trike is fast, even if the motor is stock. A couple friends and I used to take the body off of the Bugs to run them around in the woods. That body weight slows them down! We beat my 350 4bbl '69 Impala and a '77 318 4spd Dodge Aspen with it. (On a back road.) The Aspen was pretty new, and the owner was a "little" upset that he couldn't beat us.
Those were the days, our $35 Bug chassis gave me more fun than many "real" cars I've owned.