BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board

It just goes against my grain to pay over $500, sometimes way over, for a muffler, esp when
good looking chrome or polished stainless mufflers for hot rods could be used for less than
1/2 the cost.

anybody ever try any of these?

http://www.supertrapp.com/product_secti ... p?CatID=31
I'd position the "long" side of the slash toward the wheel to keep exhaust from blowing on the tire & wheel

Or one of these

http://www.supertrapp.com/product_secti ... p?CatID=28

Or one of the above with this big turn down tip (I like this one)

http://www.supertrapp.com/product_secti ... D=308-3635

Instead of a closed end cap, you could always use an open end cap like this one for a little more sound
(these muffler bodies are all straight thru with perforated core and glass wrapping, then with a variety
of end caps or turn downs. The standard end cap is closed, forcing all the exhaust thru the discs.
Here's what they look like without the discs or end cap - )

http://store.summitracing.com/partdetai ... toview=sku

http://www.supertrapp.com/product_secti ... D=304-3034

Or a more conventional sport bike type like this
'
http://www.supertrapp.com/product_secti ... p?CatID=38

Notice they all are available with a 1-3/4" inlet

They could be suspended with something like this

http://store.summitracing.com/partdetai ... toview=sku

(one of those could be polished, they're stainless)
and hung with one of these, which would give the option of mounting the muffler just a little lower
for bag clearance, which am doing to do either my stock muffler or with one of these Supertrapps

http://store.summitracing.com/partdetai ... toview=sku

Being Supertrapp does make bike mufflers of several varieties, all of course of which are more
expensive just because they're for bikes, I would think they'd sound pretty good.

Much of the above Supertrapp stuff is available at i.e. Summit Racing cheaper of course than
Supertrapp's suggested retail, and there are other less expensive sources, too. Just do a Google.

I ran a Supetrapp conventional made for a Buel, that I picked up on eBay. The mufflers are SS and well made, albeit a bit heavier and the sound is fairly mellow. I still have it......

I plan to use this Supertrapp part to muffle my beast "just a little bit". I am currently using a Headman Header tip and a full-sized system case, but the noise level around town is just above my annoyance threshold (it "OK" at 55+ mph). The obvious benefit is that it still allows the use of the RT case (essential) *and* can be tuned for noise level and exhaust back-pressure. It may be my imagination, but I percieve a slight decrease in mid-range torque since I removed the OEM muffler.

Supertrapp - Disk Only Version

I ordered this part from Summit a few weeks ago, but they sent a box that had the wrong size part in it (i.e., manufacturer mislabelled). It has since been returned and I expect the right part any day now.

I will let you know how it works out.

The only drawback I see is that it isn't "cool looking", but I will probably do something to that stainless steel end cap: paint it, polish it up , or perhaps replace it by making a cool looking one out of aluminum (I have a metal lathe).

Do a search here and many have done away with any kind of can and gone with a tip. The cat is a great sound deadner.(if you plan on running with one)

The only drawback I see is that it isn't "cool looking", but I will probably do something to that stainless steel end cap: paint it, polish it up , or perhaps replace it by making a cool looking one out of aluminum (I have a metal lathe).[/quote]

If you go onto the Supertrapp website, they have quite a variety of "custom" looking end caps available, I haven't seen them in any vendor catalogue though. I think look in the Motorcycle section and you'll find them in accessories. They sure don't give em away tho!!

OU812 wrote:Do a search here and many have done away with any kind of can and gone with a tip. The cat is a great sound deadner.(if you plan on running with one)

Yeah, probly my first option to try as it's of course the least expensive.

Follow-Up Post

I got the Supertrapp part (see above post) last Thursday and installed it.

Works like a charm. It effectively cuts the sound pressure I was feeling, but not all the growl... its still sounds better than the OEM muffler. I *think* I feel some of that missing torque back... could be just the difference in sound versus my ear tachometer.

Currently, I am keeping it in its default configuration (12 disks) until I get a chance to experiment some. I bought some extra disks so I can either increase or decrease the number used. I would like to be scientific about it, but don't have ready access to a dyno... though I haven't looked too hard.

EDIT : I can post pictures tonight.

Can you get us some pics? Inquiring minds want to know.

Here's another request for a pic of the Supertrapp. There's an "old school" appeal to this option.

I traded my OE muffler + cat for a Ztechnik system (Y-pipe plus can). The Ztechnik sounds like crap, too loud and raspy; it's not the dB that bug me either, as my Buell has an after market can that's really loud and really sweet.

Would love to try one of these shorter Supertrapp cans, specifically this one:
http://store.summitracing.com/partdetai ... P-443-1717

Lookinf forward to some pics of the install.

OK, here is the overiew pic.



And here is a closeup pic....



Its about as simple and unobtrusive as an exhaust tip, and needs no support bracket. I used a nicer T-band-clamp versus the hose clamp that came with it.

Only problem is that its very plain looking at the moment. But that can be corrected if I get tired of looking at it.

There is enough room in front of the system case for some of the smaller Supertrapp mufflers I think.

But I think this option will work for me.

How much heat does that add to the rear tire?

Good question. It really is a non-issue once you are moving, and the low volume at idle doesn't seem too threatening.

But...

I am not so much worried about heat on the tire as I am about heat on my left leg.

When you are stopped you can feel some warmth on your leg, depending on the magnitude and direction of any wind (or lack thereof). The exhaust is being dumped out in a less convienent location, but the same is true for the various other short exhaust tip options. However, it is going "out" radially instead of "back" though.

I won't know if this is a noteworthy problem until next summer, unless we get another really warm spell here. (Unlikely)

Having said that, my only concern is the exhaust gases themselves. The accumulation of any oil/soot/residue on the tire will be monitored closely.

** UPDATE **

I saw a mileage drop (~50 -> ~42 mpg) with the original/default 12 disks on the tip. My driving habits and city/highway mix have not changed.

Since I had bought a disk pack (6) with original tip purchase, I added 3 disks to stack resulting in +25% increase in exit area at 15 disks..

- MPG increased back to ~50. This change was immediate and obvious.
- No noticeable sound change. Still growls nicely.
- Revs a bit easier, especially off idle.
- Still have the missing torque back, on par with the standard BMW muffler.

Seems good enough for another long term test.

FYI - Per my original observations, this setup does result in more soot/crud on rear wheel.

Just in case anyone is interested...

I'm tempted by this, although I don't how how hard it would be to merge it up with the original muffler mount for support.
http://www.supertrapp.com/product_secti ... D=443-2011

From the looks of it, you could fit the big left case in front of it, and the end cap would keep the exhaust from blowing straight onto the case. It would blow onto the wheel, I suppose, but I don't know how much that would matter. Plus, you could swap the end cap for an open on for the track.

To be honest, based on those photos I find that Supertrapp to be less than attractive. Looks like something you'd find on a generator or tractor.

I picked up an exhaust tip in stainless at a local autoparts shop in the correct diameter for $10. Just remove the original muffler, the exhaust noise is not loud enough to be bothersome. Throaty, but not obtrusive.

Seems like a lighter (and cheaper) alternative.

The end of the cat. converter will also polish up nicely with a little rubbing compound.

Speedo66 wrote:To be honest, based on those photos I find that Supertrapp to be less than attractive. Looks like something you'd find on a generator or tractor.

I'm with you on the posted pictures. I'd hope that's the 'prototype', but if he's happy who are we to judge.

I picked up an exhaust tip in stainless at a local autoparts shop in the correct diameter for $10. Just remove the original muffler, the exhaust noise is not loud enough to be bothersome. Throaty, but not obtrusive.

Seems like a lighter (and cheaper) alternative.

I tried it briefly a few years ago, but the bike was still under warranty so I wasn't going to rock the boat. Lately I've been thinking about it more, but I'm worried about two things: noise on long trips, and passing tech at track day[0]. I suppose I could just put it back on for the track.

[0] My friend, who happens to be the tech inspector for the track day, said he wouldn't pass it without a muffler. I never got a chance to ask him about it, since it seems odd to me that 3/4 the bikes have essentially straight-thru races pipe and would be far louder anyways.

A Supertrapp for the R1200R. The approach may be similar for the R1150R.

look at this thread...

R1200R Frankenstein Muffler Surgery part 3: Supertrapp