Suzuki 2 Strokes

My set of vintage expansion chambers decided to develop a couple of small pin-holes in one of the downpipes this weekend, I thought a V1 flying bomb was going overhead

The two holes are both less than 2mm in diameter, and the metal immediately surrounding the holes is solid (it does not yield to a good poke with a screwdriver).

What do you guys think is the best fix -- braze up the holes, or just stick a couple of blobs of weld on?

The pipes are painted black to conceal rust-pitting, etc, so cosmetic appearance does not matter.

I'd braze em up. Easy peasy.

I'd braze 'em too.....but rather than brass, I'd use high temp silver braze rod. More durable and less prone to cracking and resists chemical attack far better than brass/bronze. The trick is to find someone who can gas-weld AND
understands light gauge metal welding....
My .02 worth....

thanks for the tips, guys.

As it happens, the metal around the pinholes was a bit too thin to take a proper repair, so the welder ground out the bad stuff (about a 2" x 1" hole), made up a neat little patch, welded it in, then did a nice job of smoothing the welds. A quick coat of fresh satin black and you don't notice it from 3 feet away. All for $25.

It's good to have easy access to skills like that.