your engine was 3 days younger than the one on my roadster I recently did, its "born on" was 0156 and the bike was assembled within a week of that day, they were moving fast as tecumseh could spit them out! If you end up taking the driver off the crankshaft I would be curious to know if there is a large hole oil seal (ball bearing sidecover) or just a standard crank.
maybe you'll get lucky on the sprocket/jackshaft and just maybe only have to use the next size up roll pin than stock :thumbsup:
maybe you'll get lucky on the sprocket/jackshaft and just maybe only have to use the next size up roll pin than stock :thumbsup: