Bought an fa50, took off the jug to inspect it aswell as the bottom end. There was a little bit of alluminium build up from the piston which I too some scotch Brite too, worked pretty well.
There is a little but of scoring, but very little to nothing which can be felt. Also has 110 psi of compression, which is very good for those not familiar with this bike, so I'm thinking it should be that risky to just put it back together (with new gaskets of course) and run it as is.
Thoughts?