CB 500 K1 running issue

[Oddjob]

Teds 500 won't have that seal DR, it's the bowl type.

He will have an oring between the petrol tap and the tank but it's a thin one in an oval shape. Also one between the bowl and the tap.

[deltarider]

Both my replies #40 and #42 specified it well, Oddjob. Erny's CB550K1 has the same petcock mine has: https://www.cmsnl.com/honda-cb550-k1-four-1975-usa_model466/cockfuel-cb550f_16950374671/