Thanks guys.

This wasn't at actual idle. It idles slower than that no problem.

The noise goes away at higher RPMs.

Y'all have given me great places to check for loose bolts, nuts etc. Thanks. On a 45 YO machine it's a surprise to think that something might be worn and/or loose. :biggrin2:

That is also my opinion.

One thing about it, these ole Cubs like to rattle! My 1200 is always rattling engine tins. Side panels, tunnel cover, clutch you name it! Lol I've tried loc-tite on muffler tin bolts drilling and tapping for more bolts and they still rattle. About ready to go with solid mounts!

Figured out the noise.

it's the muffler.

I put a long wooden dowel (ok a hoe handle) on the end where the elbow connects while it was running making the noise, and it went away. Remove the dowel, and it makes the noise again.

Stupid little things are great aren't they?

So handling yer "ho" makes the "ting" go away,---- sum-ting-wong with yer china muffler, Ha,LOL! :biggrin2:

:ROTF2: :beerchug:

I've heard three wheelers make similar noises. It was just valves ticks. But those are over head cam engines. These are flatheads. So I really don't know.

Hope you figure it out. :beerchug:

Flat heads make valve noise just like that. But he already said that it was the muffler.

I see. Strange noise for a muffler to make lol. I guess I didn't read in depth enough. :beerchug:

Well depends on how the muffler is made, like what kind of baffles are in it.