PICT2412

I decided to bore out the big ends on the lathe instead of using the milling machine, this enabled me to check and alter the Gudgeon pin's postion so it was dead parallel to the lathe bed, it also meant that the con-rod would be held vertically so I could lightly clamp the con-rod to make sure that the action of clamping it down does not move the con-rod out of alignment. This accuracy is so important as I am boring the big end to the crank's journal size + 0.002" for oil clearance - mounting it like this ensures that the big and little end's of the con-rod are perfectly aligned.

Done