Wikispreedia Info/Edit RE: Muffler cleaning.

[dustyattic]

I just received a brand new stock muffler for the Elite SR. This provides me an opportunity to share some important information regarding these exhausts.

In Wikispreedia's muffler cleaning section, it mentions the clean muffler weight to be about 3 pounds. My used muffler weighed a little over 7 pounds, which led me to believe it desperately needed cleaned. I over oxidized the muffler and melted out the rear internal baffle, so I bought a new one online.

Ok first, I weighed this new, never mounted muffler, and it weighs 7.2 pounds. If I had known this was the actual weight, I would have never ruined mine. Nor would I have to pay the optometrist 90 bucks to remove metal shavings from my eye, but thats a different story. Someone should go edit it to save others unnecessary effort.

Secondly, the restrictor washer isn't the only difference between the two exhausts and engines. I don't know if this is common knowledge or not. The S (restricted) exhaust mounting flange has a narrow slot and a larger round hole. The SR (unrestricted) exhaust has two identical narrow slots.

The studs in the cylinder on the SR are both narrow, I assume. The studs on the S feature one small, and one with a fat shoulder on it, to mate with the larger hole in the S exhaust.

When I tried to mount the SR exhaust to my S cylinder, the fat stud wouldn't go into the slots. I had to dremel it out slightly to slip over the shoulder on the stud.

Just passing along some info which may benefit someone.

Edit: In hindsight, it would have been easier to grind off the shoulder of the stud, after removing it from the cylinder.

[Bear45-70]

3 pounds is for the Spree muffler. Not all mufflers are the same hence the problem you encountered.

[mousewheels]

Hi,
Thank you for exhaust weight for the Elite SR. I have added your figure to the topic as a cautionary note. Folks reading this thread, if you have new/clean weights you'd like to contribute post away, and we can make a table for the exhaust cleaning topic.

The Spree exhaust mentioned in the 'wiki topic is confirmed lighter than yours. We have a member who put the Spree exhaust figure into the ball park.
http://www.hondaspree.net/phpBB3/viewto ... ds#p200231

[Dio89Elite]

dustyattic, thanks for sharing your info!

[devenex]

These tend to come in handy.

[mousewheels]

Secondly, the restrictor washer isn't the only difference between the two exhausts and engines. I don't know if this is common knowledge or not. The S (restricted) exhaust mounting flange has a narrow slot and a larger round hole. The SR (unrestricted) exhaust has two identical narrow slots.

The studs in the cylinder on the SR are both narrow, I assume. The studs on the S feature one small, and one with a fat shoulder on it, to mate with the larger hole in the S exhaust.

When I tried to mount the SR exhaust to my S cylinder, the fat stud wouldn't go into the slots. I had to dremel it out slightly to slip over the shoulder on the stud.

Thanks for that part too. Honda often took care that parts tuned for a given model would not fit an incorrect variant or sister model. In the case of the exhaust, there are carb tuning differences to match. It's a nice touch by Honda, to make sure there was not production mess ups as well as inadvertent replacement part mix-ups to cause issues.

Years down the road, there's value in collecting/compiling the differences, as they are important to restorers and modders.

[dustyattic]

You're welcome, I'm glad the info may be usefull.

And devenex - no doubt about it, I'm a believer now.