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it occurs once for each valve closure, you can feel it on each valve also both intakes, both exhausts. Yes, cam pointer jumps forward a hair when it clicks.

EDIT:
interesting. I just tried adjusting the chain, slacked the nut and backed out the bolt, rotated motor and the shaft doesn't move at all ...

Interesting, though his showed the noise when the valves reached the max opening and this is as they close, still worth checking when I pull the head.

I think I saw that, about the neoprene bits on the advance unit.
A bit more investigation with a stethoscope shows it is definitely the valves, each one shuts with an audible "click". You can feel it if you place your finger on the rocker. I presume these valve systems run quiet normally? (I have ...

So I found a donor 67 CB77 to complete my 64 with. The motor seems to be in good shape, but when rolling it slow by hand to check valve gap and timing I noticed something strange. As the advance marks (double slash) passes the pointer there is an audible "click". If I touch the exhaust rocker I can ...

I could use some bits for a superhawk I picked up recently. Don't have to be shiny(prefer not actually), just functional. This is going to be a daily rider not a show bike.

Need a set of rings jugs and pistons, a cam chain, carbs, handlebars, headlight ring, Levers perches and cables. and some ...