[Je4570]

Hi all, I had this fall off my bike / I found this next to bike on the floor. (toward rear right side) Can anyone recognize what this and where it came from? It appears to have a hole for a cotter pin at the end.

 

[Rscottp]

Part of the rear drum brake assembly?

 

[HerrDeacon]

Agree with Rscottp, its looks like #12 on this diagram - https://www.cmsnl.com/honda-cb350k4-super-sport-1972-usa_model433/partslist/F14.html#.W1sGcojPxhE

 

[Rscottp]

That's it!

 

[Je4570]

Part 11. I think thats where it goes! Thanks! “Just part of my brakes... nothing important.”

 

[ancientdad]

You must not touch the rear brake much... without that bolt, the backing plate would rotate with the wheel and wind up the brake rod, and you'd be sliding to a stop in a hurry. Hard to believe it didn't already happen if you've ridden it much

 

[davewrites]

...still better than you falling off your bike.

Minor miracle that you noticed. Congrats!