I’ve got a buzz

[CamTom12]

I've got a buzz in the front somewhere, but the bolts in that long tube behind the rad are tight. Anywhere else I should look?

[Jess from VA]

The buzz bolt buzz is not the bolt at all, but the long spacer surrounding it between the frame members.

A wrench on that bolt (nut) may feel rock solid tight, but if the spacer between the frame members is loose enough, it will buzz (sometimes badly).  When I tightened mine (the 2d time), I cranked on it with all I had, and it squeaked (not to worry it's tool steel).  I believe I had to actually compress the frame members to securely capture that long spacer to stop my buzz (a rattle actually).

When tightening, you need not get a tool on each side, just a wrench or socket on the nut side (right).

If it's not this, a front brake caliper will often make noise (like the little clip holder is loose, or the pin the floating rotors move on needs some lube).  

[CamTom12]

Should I give it a tty with a breaker bar? Definitely felt rock-solid with a normal 3/8" ratchet.

[da prez]

Loosen before tightening.

                                     da prez

[CamTom12]

Loosen before tightening.

                                     da prez

Will do, thanks!

[Skinhead]

Others have removed the bolt and spacer, added some RTV inside the spacer and reinstalled the bolt, once the RTV cures, the spacer no longer buzzes.

[CamTom12]

Others have removed the bolt and spacer, added some RTV inside the spacer and reinstalled the bolt, once the RTV cures, the spacer no longer buzzes.

I like that idea better than pinching the frame. Added RTV as in filled it up, or as in just enough to dampen the vibe?

[Skinhead]

Others have removed the bolt and spacer, added some RTV inside the spacer and reinstalled the bolt, once the RTV cures, the spacer no longer buzzes.

I like that idea better than pinching the frame. Added RTV as in filled it up, or as in just enough to dampen the vibe?

I wouldn't fill it, just in case you have to ever DI's-assemble it.  I would think a little on each end should do it.