Re: Extending muffler outlet with copper tubing?
I had a post here somewhere but for the life of me I can't find it. I'll repost the photos and hopefully they will help you a little. I wasn't worried about smelling like exhaust but I was having trouble with the oil getting on my rear wheel and brakes. I use 1/2" copper street 45 degree fitting.(A street 45 is small on one end, see the comparison pic) I made a slice in the small end, similiar to the way your carburator mounts to the intake, and used a small adjustable hose clamp to tighten it to the muffler extension. My goal was to aim the exhaust away from the rear wheel but in your case it will be a way to add a copper tubing extension. If you have access to a tubing bender ( cheapo available at Acr Hardware, Home Depot Etc.) you'd be able to make very nice bends in 1/2" soft copper to make the pipe fit wherever you want it. When everything fits together to your satisfaction slice the pipe like I did the 45 degree fitting, or use a fitting if needed and solder them together. (Use 95/5 solder, higher temp than 50/50 and stronger) There isn't enough heat at the outlet of the muffler to effect the solder joint. Make a clamp to hold the rear of the pipe or use rubber coated steel hose clamp and you're done. Hope this helps.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"