Shovel Jockey
Piano Tuna
Learned this the hard way on my 78. The "D" type does not have a lock nut behind the acorn nut that caps the adjuster. When you install the acorn nut it may screw the adjuster in effectively overtightening the cam chain and wear out your components. I went from thisto thisto this P.S anyone have a spare 80-83 adjuster they will part with?