Those butterfly shaft screws...

[dougie]

I have heard of various methods of securing them.
Backing them up on something solid, peen them with a pointed punch.
Or slot the end and hit them with a tapered punch.
It all sounds risky to me. One slip and it gets expensive.
I am considering just making them good-'n'-snug and using RED Loctite.
What do you folks think?

[ME 109]

New screws done up tightly don't seem to give much trouble.
A pita when a screw head is damaged so new ones each time is the way to go (for me)

[dougie]

New screws done up tightly don't seem to give much trouble.
A pita when a screw head is damaged so new ones each time is the way to go (for me)

Thanks Jeff.
I bought new screws. Six of them. (I know myself that well)

[moore84rs]

If you use Red Loctite; I suggest you apply a small amount to
the last few threads in the shaft, opposite the head.

To remove them you will need to heat the end with the Loctite above 400 degrees.
You want to heat the head as little as possible. If you heat it to the annealing
point of the brass the slot will be even easier to strip out.

[Garnet]

I have only had the butterfly srews out once, but them came out easily. After replaceing them I just gave them a light tap with a punch and they have stayed put.

The shaft and screws are brass and it takes very little effort to put enough of a mark on them to keep the screws in place.

[dougie]

If you use Red Loctite; I suggest you apply a small amount to
the last few threads in the shaft, opposite the head.
To remove them you will need to heat the end with the Loctite above 400 degrees.
You want to heat the head as little as possible. If you heat it to the annealing
point of the brass the slot will be even easier to strip out.

Good point about the annealing. Thanks, I didn't think of that.
I am going to use Loctite 243 instead.

[dougie]

I have only had the butterfly srews out once, but them came out easily. After replaceing them I just gave them a light tap with a punch and they have stayed put.

The shaft and screws are brass and it takes very little effort to put enough of a mark on them to keep the screws in place.

Both the old and the new screws I have, are not brass. They stick to a magnet.

[Garnet]

I have only had the butterfly srews out once, but them came out easily. After replaceing them I just gave them a light tap with a punch and they have stayed put.

The shaft and screws are brass and it takes very little effort to put enough of a mark on them to keep the screws in place.

Both the old and the new screws I have, are not brass. They stick to a magnet.

Maybe it's my brain that is brass.

[George Ryals]

There is nothing on an airhead that needs RED loctite...including carb butterfly screws. Just snug the screws down and give them a little ding with a center punch. Of course support the shaft while doing the ding.

[dougie]

There is nothing on an airhead that needs RED loctite...

How about you '69 BSA?