Supertrapp? Anyone run one?
 

Found this:
Supertrapp 3" 3M Clamp-On Exhaust Silencer - RevZilla
which needs this:
Supertrapp 4-Stroke Core Kit - RevZilla

Kinda cheap, was thinking of using my stock 300 header and selling the FMF(if repacking and the silencer don't quiet it down enough) to fund the swap.

Used to ride a buddies KLR250 that had one, it was nice. Way better than my stock KLR all around. It was lighter, louder(in a good way), and tuneable(nice when the jetting is close, better when perfect).

I'd have to find a bracket that works, shouldn't be too hard...he says without knowing.

Any opinions?

I saw one back in the 70's, I hear good things. LOL Actually I guess it one of the only adjustable pipes out there, that allows you to fine tune the sound and performance. Might be a good option and of course a great write up about it with pictures would be in order. ;)

I'm running a SuperTrapp IDS2 slip-on for a KLX300. It's a 3" muffler, but the discs are enclosed in the case instead of open like the ones you linked to. I like it a lot. Mine has the quiet-core insert, and it sounds nice and deep, but isn't overly loud, even at wide-open throttle.

SuperTrapp doesn't list the IDS2 for the KLX300 on their website anymore, but if you call them, they'll make one for you. The part number for mine was 611-6301.

Supertrap cans were pretty cool for standards back in the day; late 80's early 90's. The "tune-able" disc concept was pretty handy for the guys who were all thumbs with carburetors and jetting. No criticisms, really; the discs were a clever alternative. If you can get one cheap, probably a good thing. The sound (on an old inline 4) was a little "different" and would occasionally rattle if the discs got mis-aligned. I personally wasn't a huge fan of the sound, but I don't have any experience with a single cylinder application; might be OK.

I had one just like that on an old xr250. It was loud, really too loud for me.
marc

Thanks.
The tuneability was explained to me a long time ago. It went something like jet the bike perfect. Then if you want more or less discs, all you did was mess with the mixture screw.
I'm still hoping I can make the old Powercore IV more quiet. It's fine at idle, but blip the throttle and she roars. I pulled the old packing and am waiting for a new screen, the quiet core insert and new packing. Hoping that makes it better. It least I'll leave it on for winter.
Anything to be more con****uous is fine with me at this point. If it's noise, so be it, as long as it's not as much noise as before. If it is still too loud, I'll fleabay it and try the Supertrapp for under $200, and see what happens with that. Unless the ever more difficult to find 300 stock comes up. Seen a bunch in crappy condition for way too much money.
Not expecting much performance wise, it's really the weight savings. The less weight back there might make it feel a little more nimble. Battery is getting swapped to something much lighter without fluid, I hope. I'm hoping it adds up to 10 lbs off the ass end.

SuperTrapps were a novel & interesting idea but ultimately I don't think they actually worked. *I considered one years ago for a Honda RC31 I had set up for track use but decided against it when I read a Cycle World comparison of pipes which concluded that the SuperTrapp was the only pipe of about 12 which actually made LESS power than stock. *This finding was confirmed by a friend who also had an RC31 and was disappointed with the results. *It did sound awesome though!

Another disadvantage of the SuperTrapp is that it tends to spray exhaust soot in a radial pattern which can get messy.

If the idea worked, other manufacturers would have either copied it or bought license to use the design.

Supertraps were a big improvment from stock back in the day and I've had them on alot of bikes and 4 wheelers. Newer aftermarket pipes are better and I've gotten rid of all my old traps

You mean like the FMF MegaMax pipes that used the disc style muffler?

http://www.faster-motocross.com/images/27-1275lg.jpg

It is a bit more costly to do the disc system so I'm thinking that's one of the popularity factors along with the way it diffuses exhaust around the tip.

They're a novelty to the point that that Supertrapp is still doing brisk business as Supertrapp-Kerker and selling a ton of Harley stuff along with ATV and automotive applications as well?

The fact is that a large number of flat trackers run Supertrapps on their bikes. SuperTrapp: Performance Exhaust

http://supacustom.com/wp-content/upl..._1-590x392.jpg

Includes all 4 stroke singles, new Kaw flat trackers and others.

http://www.supertrapp.com/images/pro...ections/67.jpg

Of course you could check out what Bill Werner (former HD factory tuner for Scott Parker and others in flat track. He's also the first tuner to put a Kawasaki twin into flat track nationals and make them a winner) has to say:

In Werner’s words, “I’ve been using SuperTrapp products for years – since the late ‘70s – and have always been impressed with the quality and performance gains,” Werner said. “The SuperTrapp system is unique with a disc system that has instant tunability. It takes only minutes to make some adjustments that result in a significant power characteristic change in your motorcycle.”

The "tunability" had a lot more to do with sound than actual performance tuning. Racers that run them use an open tip with the discs to muffle sound, not tune for performance. That is emphasized by the AMA and noted on the Supertrapp web site in the racing page.

They weren't the hot ticket for sportbikes, I'll certainly say that, but were great on a lot of off roaders. They do well on a huge number of singles from ATV to flat track.

The Supertrapp is a good muffler. Full exhaust systems are dependent on more than just mufflers though. It is about the various tuning requirements for the tubing in length and ID. With twins it can get really different, with 2-2, 2-1, and 2-1-2 style headers. With mufflers there are the noise restrictions that come into play, not to mention the actual power delivery.

Then there is a lot more than just pure horsepower when it comes to exhausts. Some exhausts may not have the best horsepower, but power curve can come into play. That's even been pointed out when it comes to exhaust systems. At one time there was a header that made the highest horsepower on a GSXR, but it cut around 3 hp at all other ranges of the power range at any given rpm - doesn't come on as soon or hit as hard, in spite of higher horsepower at the redline. Then again there is also the fact that what works best on one bike doesn't always work on all.

The one thing a lot of riders really like about the Supertrapp disc system IS the tunability of sound. That will affect performance though. I've seen riders running as few as three or four discs in their mufflers and having sound near that of a stock bike. My bike runs 12 discs for the 650 and in combination with the rare Baja Designs reverse cone megaphone exhaust design, adds incredible power over the stock exhaust. The pipe is a bit loud for the rider when combined with the intake roar, but neither my neighbors nor my wife have said it is overly loud when I've asked. Apparently the exhaust alone is fairly decent. I could cut it a bit by taking out one or two discs, possibly at the cost of a tad of top end, but maybe even get a bit more low end grunt. Can you say "tunable"?

You are right about the way the Supertrapp diffuses exhaust out around the discs, but by simply adding either their protector (a bit short) or by cutting and bending a thin stainless steel shroud, the exhaust is deflected from the fender or whatever and works great. I attached it with the three fasteners that hold the core in the silencer. I'd highly recommend it if for no other reason than the ability to cut down on sound if you need to do so, yet easily open it up more when able to do so. Of course "stuffing up" the exhaust to quiet it down will cut down on performance, so it is all a trade off. I could run an open end to really cut restriction if there is any at this point, but it would be far too loud... Kiind of like some of those hot performing non-adjustable exhausts. I can do it all with one pipe.

Just letting you know it wasn't a gimmick when it comes to a muffler, perhaps a bit when it comes to tuning from a racing max HP performance point of view. Of course that doesn't help if you can't meet the sanctioning body's noise standard though.

I will say they've been around as long or longer than probably 80% of the present exhaust manufacturers. They started around 1972 with the original Xduser silencer and made the first Supertrapp muffler for MX bikes in 1973, so that puts them at about 40 years in business. That's a fairly long lived trend or gimmick.

And yes, I do like them.

There are much better choices. The trap is that when you add enough discs to flow good they are stupid loud, and when discs are removed to produce a decent sound level they dont flow.

@klx678: SuperTrapp obviously still has a following and I'll count you among them!

Seems that most any pipe that flows well is too loud. That is because the motorcycle aftermarket doesn't do what the car aftermarket has... make a REAL muffler that will flow. Can you say Flowmaster? I thought you could. Seems a truly chambered muffler versus a cheap glass pack design common to the motorcycle industry, can both flow and bafffle. It does take some volume to do so. If only motorcyclists were willing to pay a bit for a good muffler design, but if it ain't cheap or loud they won't buy it. Part of the problem with Supertrapp.

By the way, can you take your "better choice" and vary the flow and sound to suit your area? You can with a Supertrapp, six allen bolts, take out two discs and I'm quieter if needed. And if you've ever been to a Grand National flat track event you would notice the bikes aren't that loud either and that is a sport that counts on sheer horsepower. They give direction on tuning sound to power too. It's not some it on slap on affair.

I believe the biggest reason you don't see Supertrapp in the dual sport and sportbike aftermarket is likely due to their growing share of both the Harley market and the automotive market and that they aren't low buck either. They have both the Kerker and Supertrapp brands, with the latter being involved in both racing and street applications for automobiles along with the Doug Thorley Headers (automobile performace headers). That and the fact that they have also acquired Jardine, which has both off road and sport bike applications. So I would venture to say they may be targeting brands. They aren't sitting still.

They introduced the internal disc set up for the BMW800 and 1250 (or whatever it is). If you saw it you would see a big muffler to get some flow without being restrictive, yet still have quiet tone.

I am goint to try one of these!
 

SuperTrapp: Performance Exhaust

Going to try it anyway! As I love to be different! I am also going to try the Ecotrons fuel injection system!

After doing a lot of research, I decided that the FMF was going to be too loud for me. I started looking on Ebay. It only took a couple of days to find a KLX300 header and muffler for $120 with free shipping. After I got it I wire brushed it and spray painted it with high heat paint. It sounds nice, but not loud and looks new and completely stock on the bike. Just my opinion, but I would have spent up to $200 dollars on a KLX300 setup and still felt like it was the right choice for performance and noise level.

Good luck with whatever you decide,
Lorrin

I hate to be the bearer of bad news, but when I was selling the KLX300 in the early 2000s the trick for them per Kawasaki off road performance tuners was to get rid of the restrictive pipe (head pipe and can) and put on a slide carb. It would actually add about 20% more power to the bike.

You may get some gain since it is an off road muffler and has a bit more flow, but no where near as much as a good flowing system can give. The benefit I found in the Supertrapp was the ability to set sound and live with whatever gain was had. Fortunately my bike was not obnoxiously loud (per neighbors and others I've asked) with 12 discs so it flows pretty freely. If I had to I could cut it down to eight and quiet the bike down a fair amount. I've seen them used since the 70s with good and bad results, the bad results usually being too noisy from I-dots who either put on the open end or took off all the discs and end caps. Those who used them right usually had decent sound without excess.

Again, no gimmick, results proven and still in use in flat track racing at the top level.

Does the yam xt version fit the klx?

I've used tons of SuperT's over the years and even had a 5" can on my 383 stroked 4X4 GMC Jimmy. They're good and flow well. They are just about too loud for a street bike unless you get the one like mustang mentioned. I had one on my last '01 KLR650, and that was a nice muffler. It shrouds the discs, so it's no more obnoxious than any other aftermarket pipe. Looks good too.

Back in the day when I'd run out of disks to add to the trap I've added washers between the disks to space them out farther to flow more. Nearly every one I ever owned, had a few washers to open it as far as I needed it to be. On my XL600 you really could change where the power came on by open and closing it.