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The Yamaha crankpin is too long, so it got shortened to 2.380 “.
I called my friend Dan, who has considerable experience with very hard metals.
A lot of my inspiration to build an Aermacchi Racer came from the excellent article by Chris Kerber entitled, “Racing the Aermacchi Harley Davidson Sprint“.
Chris has raced Aermacchis for almost 2 decades, and is extremely knowledgeable about them.
I glued an insert over the oil transfer hole, and plugged the shifter shaft hole.
I machined a cover for the LS bearing, and installed an oil seal.