Buyer beware

FYI:

A few months ago I ordered an Emgo muffler for my old SR500 through
Amazon. The web page said it would fit a 1.75" exhaust pipe. It didn't.
I returned it.

After a short hiatus while busy with other things, I tried again. Amazon
showed a Helix Dunstall replica that again was specified to fit up to a
1.75" pipe. But having been taken once, I emailed the manufacturer to
check on this. I was assured it would fit so I ordered it.

You know the end of the story - the #@$%! thing was too small as well!

When even the manufacturer gives false info, I tend to get discouraged.
Don't know what I'll do next. Maybe visit the local salvage yard with a
digital caliper.

 

Is the 1.75" exhaust pipe the stock size for your SR500?

If the muffler wasn't too far off, I would have tried one of these on it:

http://www.rjtool.com/tail-pipe-expander-lisle-32500.html

 

I don't know how well that would work on the slotted end of a muffler,
but thanks for the suggestion. So far I have 3 alternatives.

1. The manufacturer has offered to swap me for a slightly different
muffler.

2. I could return it through Amazon and start over.

3. I could get an adapter and use the muffler as is.

Your suggestion gives me a 4th option.

I'm leaning towards number 3. The local gurus claim that necking down
from 1.75" to 1.625" won't make a noticeable power difference to a 500
single. And I like the Dunstall type as it's 26" long and my current
muffler is 27".

In answer to your question, I think 1.75" is stock. Mine is not the
original tailpipe, but all I did was replace a double wall pipe with a
single wall pipe.

Thanks again for the idea.

 

I wouldn't worry one iota about the performance hit, if any. The aftermarket
can probably is less restrictive than stock, and my guess is the exhaust
pipe even at 1 - 5/8" is never the source of backpressure, whatever baffling
you have, is.