Mine came with a Stealth already fitted;

I took it off and replaced it with an Albert special - his normal can plus a couple of extra tubes which can be slid up the inside to reduce the silencing effect ( all the way to zero if desired ), thus it is fully customisable for the desired level of aural porn.

The Stealth does not have a removable DB Killer: I found it too quiet.; Alberts does have one.

1) My Stealth can is for sale - 150 quid plus p&p - see the For Sale section for piccies.

2) Alberts can is better made for similar money; no comparison in the quality of the welding.

Both are infinitely better than the rusty junk that comes from the factory.

enjoy

Ant

hi maz....how about drilling a small hole say 1/8'' in it see whats inside i must say the pipe on alberts bike sounded fine on his last sunday,nothing like as loud as a race pipe on a tuber although the one on his was the latest single outlet one with the most silencer around it.

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........have you tried turning me off & then turning me on again ?

Then you need to see it first hand -

'tis a true work of art. Form and function in harmony.

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Sept 2017. Email will find me.

Having dented my Stealth (although not as bad as I originally thought) I was contemplating the 'Albert' so this is all very interesting. Also doing a bit of reading and poking around inside my collection of XB tubes. I have some doubts about the suitability of some cans for my 984 motor, as most of these pipes seem to have been developed with the 1200 in mind.

For instance (and I've said it before) The Stealth I have as built for a '9', gives me mucho torque up to 5k, but feels like it's slowing the gases down. It has a 50mm inlet and 46mm exit with an abrupt cut off at the rear of the can. This creates an 8% throttle, which is recommended in text books for 'retaining the wave' in the can. Whatever that means!

The standard '06' XB9 can has a 50mm inlet with a 42mm exit (the perforated tubes inside are doubled (unknown diameter) and I assume gases cross over. Mine has been modified by Tubbs and like the standard can gets a big rush on from 4500. I wonder if the XB9 really needs a 44mm exit for the best of both worlds.

But whatever can I decide on I still have some reservations about the internal dimensions for this size engine. The standard headers converge into quite a big tube, which looks like it may act like a 'plenum chamber'. Think about the additional step at the point where the header enters the can (mass production has some compromises). The stealth has another step just beyond this point, which the gases will see. I am thinking of cutting and beating out a short tube insert to create a butt joint to the header to give a smooth taper into the can. Watch this space

I suppose I could also make a weeny inside pipe for the other end of the Stealth.

Sorry that's 'expansion' not 'plenum'. Unless I fit an afterburner as well!

How will you quantify the effect? You could do a similar experiment with a Remus as it has a couple of different baffles to try out...

The Ti Force goes from 1.75" diameter headers, to an X junction, then exits to two 1.75" pipes...

The Buell Pro-Race exhaust for the tuber goes from 1.75" headers to a 2.5" collector to 2.5" at the exit...

Neither have a reduced diameter (which books are you reading BTW?) at the exit.

Anyway, anyone who has ridden my XB12R will tell you it is no slouch, but against the hairy chest tuber (same dyno) it just can't cut it...

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08 Specialized Langster

A pretty graph always wins the argument!

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I hate people who say they will ring back and they don't - take a hint (St) dealers!

Thanks, but I am not doubting big bore exits having ridden a City X with a Buell race can (about the same as standard).
As I say, the 1200 seems to be quite a different motor to use in some ways. It depends on what you want your engine to do. My Tubbs modified lacks the bottom end of my Stealth, but seems to make very good power as revs climb, and it has a puny standard single 42mm exit.

The Stealth is so strong in the midrange 5th pulls like the standard can did in 4th. Just ask my girlfriend, I had to buy her a harness to hold on.

I will quantify the effect of my experiments (have to make it yet ) by 'seat of the pants' and am only planning to work at improving what I have, not planning to dyno my motor. The effects of the three different cans used on my 9 are real enough and appear to concur with stuff I have read? If I fit a sleeved taper into the inlet of my silencer, it will be ground to a push fit so could be easily changed or adjusted. Streamlining any step in the exhaust system is unlikely to hurt performance, but too big a step in the path where you don't want it is not good. I bet your TI Force is nicely contoured throughout Pash. Hence the full retail price.

Anyway, you can have fun experimenting at less cost than having a bespoke pipe made. It may unlock the high rpm potential my Stealth seems to lack! Or it may just be crap, but at least I will have tried!

I have an Albert reverso can on my 1125R and the noise is just unbelievable.
Guys at work said it sounds like a helicopter when I started it up in the multi story car park. It's a bit quieter if the db eater is in.

No argument to be won. I posted that to show the difference between two different exhausts on essentially the same engine.



Ever thought that the fuelling (and ignition) may need to be optimised for the exhaust?



OK, PM me her phone number



It has some big steps in diameter in the headers, there are some cones that look a bit like this:



These are pulse converters to try to reduce the amplitude of the wave transmitted from the other cylinder which arrives at the exhaust valve of the cylinder in question.



Again, what is your fuelling like up there? I think you need these fitted:



so you can look at your AFR. They (the headers) are owned by UKBEG but are dossing at my house...



Tell me about it, I spent about 5 hours in the dyno room with one... Albert666 was there too, but he is well 'ard!

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08 Specialized Langster

For what its worth, i have a reverso fitted to my 1125R. The workmanship and the finish is excellent.. it is loud (ish) but it is a v twin.... you expect a little rumble

On the move... its sweet

Good value for what you get IMHO

everyone at work used to say my aprilia sounded like a helicopter coming down the road
now my boss reckons he can hear me open up the buell from two miles away

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Buell X1
Buell xb12s
Buell 1125r
Ebr 1190rx
Bimota Db7
Norton v4rr??



http://www.aph-performance-engineering.com

That's bad news he can now tell if your running late or not.

I take on board all your comments about fuelling Pash. My ECM is supposed to be adaptive, but it does not seem to adapt for all irregularities. As I said before my Stealth feels strong, but slows the gases and the engine down. It's the surfeit of torque that makes riding it ok.

The point is that big throttle openings can result in mucho noise for not as much go as you'd expect. At other times idling along in low gear in town, a big handful of throttle will see the bike shoot off like a rocket. I think this is because at the right speed and the right throttle opening, the gases have had time to flow around those big steps in the exhaust.

The reading I did was from web sites on performance silencers and high performance harley exhausts. A good US Co.(don't remember which) does a good site explaining pipe diameter and more important collectors for manifolds. The best power would appear to come from one piece or complete exhaust systems. People are so obsessed with flashy new cans, they may be overlooking a potential XB weakness where the headers meet the can?

Regardless of the design of the exhaust you have, the secret to a blissful ride is to match the fuelling to the exhaust. Matching the exhaust to the fuelling is a bit like putting the cart before the horse… Don’t be put off trying them though…

I am quite happy to help you fix the fuelling. Give me a couple of months or so as I have a few incomplete projects.

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08 Specialized Langster