Thumper Club Forum
Technical => Bike Problems/Questions => Topic started by: XBR2471 on December 23, 2008, 10:54:11 PM
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Hi I am new to the forum and as usual I am having trouble replacing my XBR silencers :-[ I have the later single piece type systems but I am sure someone must have worked out if the downpipes can be separated from the silencers and then the complete lot stripped for re-chroming. Am I mad :-\ or am I looking at an expensive custom stainless system being made or hunting down the rare offside pipe :'(
Thanks in advance and Merry Christmas to you all.
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Motad has said if ten people get together they will produce a run of new exhausts for the XBR. If you are interested in the stainless system let me know so we can get a price and time for ten to be made.
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Count me in, their stainless exhaust was bloody marvellous (although the silencer was chromed steel).
I have a much-abused one hanging in the garage and a nearly new one waiting to go on a bike. The nearly new one cost me £150 on Ebay, but having got 10 years out of my first one I thought it was well worth it.
Not to be confused with the Micron 2-1 exhaust which was just plain nasty
GC
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Hi
I am also interested in one.
I just spoke to someone at Motad and he told me that if he had ten e-mails from people saying that they would be interested in buying an exhaust he would do a run to produce them.
send you're emails to sales@motad.co.uk or go to the site and click on sales http://www.motad.co.uk/contactus.php
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Email sent ;)
GC
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Count me in also email sent. I definitely want 1 pos 2 systems
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I have sent an email as well. No response received yet, or indication of possible cost.
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Sent my request in too! We ought to raise this issue in the Chatter forum as I reckon it may get a few more interested?
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Sent my email via the Motad web site and got a response in about 10 minutes!
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Hi Im new to the site and xbr 500s but it looks like i have the same problem as many of you, shortage of exhausts.Unfortunatley i cant justify the price of a motad system as the bike is new to me and a completley unknown quantity.what im considering is a second hand micron system but they dont seem very popular. Can anyone explaine why please.my other question is that the internal bore of the honda down pipe is quite small is this essentail or is the motad system a bigger bore.Thanks,great web site.pete b
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I believe the Motad pipes are near enough the same diameter as the standard Honda (internal) pipes.
It's too late for me to go down to the garage to check this out sorry.
GC
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If the downpipes are a bigger bore then I'd be interested, I don't need the silencer though.
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Jst to clarify, the Motad downpipes are small bore. The Honda pipes are doubleskinned (to give the appearance of being large diameter?). The internal pipe diameter (the bit that does the work) is the same for the Motad and the Honda pipes.
The Motad OD is smaller than the Honda OD.
GC
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Normally, you get better gas flow if the downpipe ID is the same as the exhaust port. Going bigger won't go better.
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Normally, you get better gas flow if the downpipe ID is the same as the exhaust port. Going bigger won't go better.
A well tuned XBR needs a bigger exhaust pipe diameter, I currently run an HRC copy 2:1, the downpipes are a much bigger diameter. I need a new setup to meet the latest noise regs, with the stock dia I can't get any top end end power.
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Just joined and found this thread - another e-mail sent to Motad. Here's hoping.
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Received an email from a very helpful person at Motad today.
They would have to design an exhaust from scratch, as the information from the original system is no longer available to them. So they could potentially make a 2 into 2 system (like the original), or do a 2-1. If there is enough interest, the cost would probably be less than £300 ...but that depends on the design of the system.
If you are seriously interested and would like a copy of the email from Motad, then PM me.
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As you've established contact with 'em, perhaps you could mail them back and say I've got a pristine Motad exhaust that they can borrow if they want to copy it.
Cheers
GC
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Here is the email that I received from Motad:-
Thanks for your interest Tony
here are the facts- open as ever
We discontinued the XBR500 system about 10 years ago- a combination of low demand as the bike went from "old" to "classic" when demand picks up again- and also because we were not completely happy with the mid range power. The feedback from members suggest we were too "picky".
We moved factory and some of the older jigs/tools were discarded- including the XBR500
At the last Stafford show- the XBR500 was top of questions "do you do an exhaust?"
I asked all interested parties to contact me after the show to get a group together- and I also posted on our website- there were zero contacts and the project was shelved.
Are we interested in a small/medium production run?- yes we are (we recently did our first batch of Hesketh in 30 years)
The key is having a central customer willing to change the undoubted interest into a hard order for an agreed batch .
We would need a bike and an owner willing to loan it for 3-4 weeks.
We would need to discuss style- i would recomend stainless steel as being similar in price to the decent (expensive ) chrome we use
2-1?
We can make a one off- but this would be expensive
Really so we can spread the cost of development, we need a batch of 15-20
I would be happy to make this a specific and unique XBR club system that you could sell- or otherwise perhaps spread the cost a little if I could publicise your batch, and then make some for others at the same time.
Throw me your thoughts!!!
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I can email my contact to say that you are willing to loan them your exhuast ...if that helps. Meanwhile, it has been a while since we started this thread off, so maybe those (still) interested could reply again to this thread - or email sales@motad.co.uk ... unless someone has a better idea?
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..... If there is enough interest, the cost would probably be less than £300 ...but that depends on the design of the system.
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Ah buggrit, just 2 days after I ordered a Predator system! Mined ewe, by the time they get jigs together and sort any prototype tuning bugs out I would likely have given up anyway, but still .....
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I've spent some time measuring up what I've got. The stock downpipes have an ID of 29mm, the Motad according to the info previously posted is the same. The Micron 2:1 that I have run (and dyno'd) on my race engine has 25mm ID downpipes. Its interesting the Motad weren't happy with the mid-range, the Micron seems to work very well there - maybe because of the smaller downpipes. The HRC 2:1 has an ID of approx 32mm, the same as the OS 2:2 stainless pipes. I've had 5 different exhaust setups (all dyno'd) and I think that the 32mm (35 OD) pipes will work very well with some freer flowing silencers. Its going to be a while before my bike is up and running but I will do another dyno test stock downpipes v OS downpipes.
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If they need one for 3 -4 weeks they can borrow mine - if my hunt for stock downipes proves fruitless i'll need a Motad anyway.
Steve