This is a picture of the progress I have made on my Z2 Hen. I just got the cylinders and intake housings back from a valve job. Adjusting the valves is quite a job because you have to take the cylinder off and pull the exhaust tappet out of the engine for adjustment. You adjust the tappet in a vice and then put everything back together and measure it with a feeler gauge. You can use dial calipers to get yourself close, but the proof is in a fully assembled and tightened cylinder. With goof off time, it takes a full afternoon.

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