After the disassembly, cleaning the individual parts and removing the bearings, the next step was to remove the genuine silver paint on crankcase halves.
This was done by applying the layer of chemical remover with the brush. Note that the engine serial number punched bears only the particular code of the bike (5Y7) on the japanese home market models.
Following issue was to remove an oxidation and dust on the limited accessible places like valve cover.
We wanted to avoid sand blasting in order to preserve the contact surfaces intact, so a variety of abrasive wheels, sand paper, thinner and slow manual work have been utilised.
Another problem to be solved is a missing edge of the upper rib of the cylinder.
The plan is to paint these parts with a primer and then with a black gloss coat suitable for high temperature. At the moment, it is clear, that another parts have to be replaced, eg. the valve guides and the valve rocker arms.
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