leakdown

Is it possible to do a leak down test that shows less than 4% loss, and still have top end issues? My leak tester is reading 88 psi in and 86 psi out on all cylinders. Cylinder 3 plug looks rich, but not soaked, and I'm getting 20mpg. I'm very concerned about gas washing that cylinder and am...

Checked compression with warm engine, wide open throttle, all came in at around 120 psi. Bike runs strong but this PSI seems low. Is it? Is a 98 with 10k miles. Is this telling me I need a valve/lifter adjustment? Thanks.

Im looking at buying a used 85 vmax and want to check out the engine as well as I can. Im pretty sure I know how to do a compression check but not sure on the leak down or if I need to do it. Which test should I do? And does anyone have a link which discribes both or the leak down test...