Today's project: Copper tailpipe.

I saw pictures online of a tailpipe fabricated from electrical conduit, and I was going to do the same, even though conduit is ugly. But I ended up in the Plumbing department at Lowe's, and all that pretty copper inspired me. The bike is MUCH quieter now.

I learned the hard way that copper tubing doesn't bend easily. After breaking the first piece in two places, I googled to learn what annealing really is, and it saved the day.

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My wife tells me the bike isn't really quieter. It just seems that way to me because of the exhaust being directed behind me.
 
That's a good question. I think it is affecting performance. Is that possible? I seem to be having more torque issues, but I can think of three possible causes, including the tailpipe.
 
Exhaust, especially on a 2 stroke, is pretty important. I do not mess with 2 strokes very much, but I would guess you have to much back pressure. Do some research and see about going with a straight pipe. It will be VERY loud though. Wish I could help more, just not as knowledgeable about 2 strokes.
 
Update: I removed the tailpipe, and still have torque issues. So I'll have to find out the source of the problem, and then see if the tailpipe is an issue.

I'll start a new thread about this, but in case anybody here has an answer, I'm losing a little compression through my decompression valve. I milled the fitting myself, and it's mostly tight, but loses just a little bit of pressure. I can see it.

I'm hoping I can apply some kind of sealer to resolve this. What kinds of sealers can handle cylinder heat heat/pressure?
 
If your compression is so high that you need a decompression valve then it is way too high. Junk the valve and add a head gasket. Too high compression will trash your top rod bearing.
 
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