Re: Finishing First Build - Leftover Parts??
12 looks like a clutch adjusting nut for 1941 to 1984 Harley-Davidson Big Twins.
What it could be used for on an motorized bicycle I dunno.... They have 3/8-24 threads.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."