Hey all,
I recently picked up a almost new Webra 40 and would hate to throw it because it has no muffler. I believe that this is the earlier version that uses a strap on muffler as I could not find any regular bolt holes. Does any one know where I could buy such mufflers?

many thanks
-Chris L.

If the boss on the side of the exhaust is large enough you can drill and tap the exhaust stack to fit a wide range of exhaust systems.
This is what I did with this Webra Speed 10cc. (see attached)
I have to say I never really had too much luck with the hose clamped on exhaust systems.

These people make a strap-on for 40's. I had one and it fit all the old 40's I tried it on.

http://www.macspro.com/onepiece.asp

Do they have a centering (piloting) feature to help keep the adaptor aligned on the stack as the engine vibrates?

I have one of the late model Webra mufflers. It has two lugs that capture the exhaust stack on the engine case. This one is drilled/tapped for the bolt through late model engines.

The only difference between the early and late styles were the location of the holes. On the strap-on the holes were 90 degrees to allow the use of the strap.

(PS: I'm not using this one if you're interested in it, PM me.)

There are rails top and bottom that locate the muffler on the engine

Good to know, Thanks.

This is an important feature for a strap on.

Hmmm, Ill upload a picture of my engine too, from what I see so far, I might just go with the Macs pipe.