Yamaha YBB-202MSWC - Thumb Ring Issue

[TubaPresident]

I am having a problem with a Yahama YBB-202MSWC's thumb ring. This is the first time I have ever used this model horn, so I don't know if the thumb ring is supposed to be adjustable or not. But it's screwed in with a bolt that suggests that it is adjustable because when I screw it in all the way, it's in a VERY non-ergonomic position. How am I supposed to adjust the thumb ring?

[hduong]

Having marched on those horns for that last 4 years, we came up with a few options when this problem occurred.

1. Adjust the washer so that the thumb ring is in a comfortable position

2. take the thumb ring off
and
3. Over-tighten the thumbring until it's in a comfortable spot (Not recommended, because that's what caused this issue in the first place)

[TubaPresident]

1. Adjust the washer so that the thumb ring is in a comfortable position)

The problem when I adjust the washer and tighten it with adequate force, it just becomes loose again and won't stay in place.

[TubaPresident]

Fixed it. I just needed to use a pair of pliers to give me enough leverage to tighten it enough. Thank you!

[hduong]

Yeah, we ended up taking off the thumb rings on the horns that had this issue. Made snapping and the horn at carry easier for some players.