It took me almost a hour to mount the head on 4-jaw chuck. But I got the bottom surface running true with accuracy less than 0.001 inch (0.025mm). Then in 10 minutes on low rpm (to not introduce any vibrations) I shaved 0.5mm of that (+/- 0.01mm)

Next problem. The top of the cylindr had some burned oil so the piston didn't want to go higher. Carb-cleaner, wooden stick, and paper towel did the job cleaning the top of the head.

I checked compression - I don't have tools but I can feel it is much better. Feels like MVVS 1.6.

Tomorrow I will replace the head (I didn't do any porting yet) on my first magneto ignited engine. I will see if I can get better rpm. Can I just swap heads on these engines? Just for testing?


RysiuM