Exhaust systems

[deller4210]

Any one know of a manufacture that produces a complete exhaust system for the Sprint ST?

[Marty]

I am looking for RS stuff, and found dEEz....

http://www.webbikeworld.com/motorcycle-exhaust-systems/


no pun intended :-D

I think this a good starting point.

[cak03]

Power Max makes an underseat exhaust system for the ST. It is $1200 but looks and sounds great!

I stumbled across this Australian firm that may be useful. Looks like quality equipment & they have a US agent.

[shawboy]

hh - do you have a link?

are these full systems? I don't think the Powermax is.

also - Dan'l in a recent thread mentioned that the guys at Riders of the Lost Empire had an underseat in the works (4-6 weeks out) although it's unclear whether it's a full system or not.

shawboy

[yerguy]

Sorry guys but....

Shawboy is correct, the underseat system from the Lost Empire dudes will be a slip on type system, clamping onto the same point our cans mount now.

Deller?? Unless you're hoping to extract the absolute max HP outta your ST, or trying to lose a few pounds via a tianium system, how's come you want to replace the entire system??

The reason why I ask is I've studied the exhaust system on our ST's and can find nothing to fault in it's design or execution.

It uses a good looking high quality stainless steel, the obvious mandrel bends are all open and sweeping with NO tooling marks, lumps or bumps from the mandrel. The welding looks excellent, albeit robotic MIG versus the pretty lil' welds of a hand TIG weld.

According to Jennings old 4 Stroke Horsepower book, the diameters, and length of the primary and secondary tubes appears to satisfy accepted therory and a really nice convergence at the collector. I am very pleased to see that Triumph included a cross over pipe which does wonders for the lower mid range drivability and throttle response. If it was'nt there, I'd include it.

Thinking it through, I think it would be pretty hard to produce anything that would really improve on this design. And...I think any improvement would be marginal at best.

Sure, by playing around on a dyno one could make changes in diam and lengths and maybe shift the horsepower curve, but that usually comes at a big sacrifice of horsepower somewhere else. And again I would like to say, current motorcycle engines are so highly tuned nowdays there really is'nt a whole lot to be gained there.

A thought came to mind (Oh no!! It hurt's, it hurt's!!) Since discovering the Triumph 3 cylinder models, one thing that has always struck me as something unique to the these engines is they ALWAYS have a big fat mid range that exceeds virtually everything else out there on the market.

Sure, you can look at any number of the Jap or Italian bikes and will see much bigger peak horspower numbers, BUT....they are at such a stratospheric RPM level, you can almost never use it in normal street riding. IMHO, I think Triumph has built a much better REAL world motorcycle than many of the others. I think most of the other manufacturers are caught up in an advertising hype horsepower war, but Triumph instead decided to go their own way and build somehing the owners can use, rather than be the basis of bragging rights.

I think of 2 other examples of "Real World" motorcycles that do things a little differently are BMW with the boxer engine or Moto Guzzi and their v-twin. Neither can brag about killer HP numbers, but if you've ever ridden one, it's impressive what sheer torque can do. Remember, torque is what launches your down the road.

Triumph/Ducati of So, Calif had an open house this past weekend with demo rides on a number of Ducks and Triumphs. I spent about 30 min. on a Ducati ST4 and a Multistrada and came away with the impression that the Triumph is a much better balanced, smoother and easier to ride machine. Sure, the Ducks are a bit edgier, and everything is so much more immediate and direct vs. the Sprint, but I could easily forsee this becoming a bit tiresome when you would rather kick back and cruise rather than scream down the road.

I swap back and forth on a friends RC 51 and he says of the ST..."The Triumph is a whole package, where everything works together well. Low end drivability,a BIG fat mid-range, and a strong top end surge. It's deceptively easy to go really fast and nowhere as much work or requires the focus and attention needed to ride the RC51 really fast"

He's a pretty accomplished rider and part time racer and I value his candid impressions and I think this is pretty high praise indeed.

In my mind, I think if you want more get up and go, I think it might be better spent on suspension improvements. If you really want more ponies, you can always boost the fuel pressure, go to a better breating exhaust, and eventually add both Daytona cams/springs and pistons (their lighter you know)

But then again, if you want to ride something markedly faster, maybe something other than a sport touring bike is in order????

My 2 cents worth????

Dan'l
So. Calif.

[thfwsf]

If one is really, really looking for horsepower, there is a turbo kit made for the Sprint. A link to a website with a review of the turbo ST is: Triumph ST

[ This message was edited by: thfwsf on 2004-04-13 20:29 ]

[deller4210]

Yerguy, I agree that the Triumph Sprint ST is a very balanced machine with a ton of midrange torque and drivability. It is the best street born motorcycle I have ever owned.
My interest in a complete exhaust system is one of curiosity only. I too think that a manufacture would be hard pressed to produce a system that would improve performance, even a straight up replacement would be expensive.
I have contacted exhaust system manufactures regarding this issue and received the following response, “Triumph has done a very good job with their exhaust header. It would cost us $500,000 dollars to improve on it and by the time we went to production our costs would be in excess of one million dollars. We would never sell enough units to come even close to breaking even.”
If you have visit the Wilcox web site there is a picture of a 955i on a test stand running full blast, the header looks hotter than the sun. I don’t think the materials used by after market producers could hold up to that. Again, I was simply wondering if anyone has produced any thing that they claim improves performance. If so it would be nothing but hype.

Sorry guys the link is:

www.staintune.com.au

[dolson]

Agreeing with Dan'l on all counts. The engine on our scoots are really real world total packages from the factory. There aren't too many things that can be done to improve them. One thing is the fuel pressure. Increasing that and then remapping via Wayne's TuneBoy/TuneEdit program will make a big difference.

IMHO you put a can on to hear the banshee wail. You'll get very little H/P torque improvement there. Most know my feelings on K/N so won't go there.

Other than that you have to crack open the egg. Flow the intake and exhaust tracks and lighten up the valve train and the parts that go up and down.

You go that far think of a different machine.

Just my $.02 worth.

Don