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TOPIC: Re:xrtt fairings
#591
xlnoel.nz (User)
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xrtt fairings 13 Years ago Karma: 0  
Hi, I just found this forum today so I joined right up, looks like it could be allot of help. I live in New Zealand and there are very few XR's and probably no XRTT's here, in fact I've never seen one of either but i am trying to build a race bike based on an XR frame. I currently race a modified XLCH in Pre'63 Classic Roadracing but the XL frame is very heavy, so when I saw an XR frame in the local paper I bought it straight away. I intend to continue with the XL engine but fitted into the XR chassis which is a highboy type with the horizontal back bone and the raised brace. I am trying to find fibreglass fairings that would work with the higher steering head of my frame, I guess the KRTT style is my best bet, anyone out there ever fitted a fairing to an XR frame ? I have seen product for sale at Airtech but after 3 emails have not had a reply from them, has anyone had any dealings with them or can you recommend somebody that wants my money. I'll try to upload a picture of my bike as it is now. Thanks Noel.
 
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#592
Tom (Admin)
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Re: xrtt fairings 13 Years ago Karma: 0  
Hi Noel,
I know it is confusing but my XR Forum is build up of two independent services. One is the website (XR-Forum) to which you registered and the other is a seperate mailing list (xr-list) to which you can register at the bottom of each page. Every post in the forum is send to the list members so they don't have to check the forum every day (traffic is quite low). However , every reply to the list via mail wouldn't find the route back into the forum. Since most people prefer to answer to the list using their mail program rather than the Forum mask I recommend to register to the list as well. I'm not going to claim that the current solution is "genius" but a forum and a mailing system do both have several advantages and disadvantages and I just tried to make a usefull combination ...

So today you've missed the following answer to the xr-list from JW (alias rebels_free)

*******************************************************
Hi Noel!

What do you mean with an XR frame?
The XR1000 cycle is based on a standard XL frame, and won't make a
difference.
The XR750 cycle had it's own frame, and although I don't know what it's
worth, everybody seems to replace that as well.
Tom is your man for circuit racing, and I seem to remember that he found his
race frame second hand in Sweden.
But there're some people in Germany who seem to make a good racing frame for
XR1000. (see picture)
I think this was the link, but I'm not sure. http://www.strproduce.de/dynamic/rahmen.htm

As for Air tech.... Their website looks very professional and promising, but
don't judge a book by it's cover!
I once called them for a dirt track seat. First they weren't very helpful,
and in the end they asked me if I was nuts for calling them from
Switzerland! I couldn't possibly expect them to ship overseas!!
These guys in Germany might be able to help with fairing as well.

Good luck!
JW
******************************************************

JW is right, we got the frame and the fairing second hand from Sweden where it was handmade by "Tassen Sportster Specialistn"
Those Swedish guys are the onyl XRTT people I've been in contact with. Propably most vintage-racers don't use computers ...
The Swedish frame is said to be a slightly modified copy of the original XRTT750 frame from 1973 (I think). The backbone is a little bit higher for clearance when using XR1000 engines. The steering head is positioned incredible low and any other fork than a 35mm Ceriani won't probably fit very well.

The German XR750 Kit mentioned by JW looks to be fine, but I've never really seen it (although the company is "just" about 600 miles away from my home). The following link does show some more details at the bottom of the page. http://www.strracingchassis.com/classikkits.html

I'm afraid shipping those parts to New Zealand might become expensive, but that's a problem you'll always have until XRTT's are getting a little bit more trendy in New Zealand within the next months ...

I was looking at the pictures you've put into the gallery. Holy Iron. What are your main compitors in the pre'63 class? Is there a website of the organisation carrying out that vintage races in NZ?


Tom
 
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#593
xlnoel.nz (User)
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xrtt fairings 13 Years ago Karma: 0  
Thanks JW and Tom, I'm finding my way slowly. My frame is an xr750 dirt track frame so the steering head is higher than the xrtt version hence the standard xrtt fairing won't be tall enough. The links you have given me look promising, I'll give them a go.
The club I race with is the "New Zealand Classic Motorcycle Racing Register", www.nzcmrr.com . The bike class's were orriginally set up along the traditional English or European lines catering for 350's and 500's. Any bike built post World War 2 and up to '63 over 500cc runs in a class called "Open & Modified, Pre '63". Maximum 1300cc, any type of drum brakes but no discs, methanol fuel if you want, frame modifications of a period style. My competition ride Norton and Triumph 650 and 750's with the occational BSA. Last years championship winner was an 850cc Triton running on methanol. I finished third for the year, not because I'm fast but from consistantly scoring points and finishing every race. On sunday we had a small meeting, 120 riders, at Pukekohe, the track where Cal Rayborn was killed riding for Suzuki. I placed third and fourth but there was only 7 or 8 in my class. When my class only has a small feild they combine us with the "Open Post Classics", '64 to '76, open cc rating up to 1300 again. Thats Tridents, Rocket 3's, Bonnies, Commando's and a couple of Ducati's.
I've been racing the XL for 4 years and while I received a rather cool reception at first they now accept we're here to stay and the tractor and compressor jokes have dried up. This year a second sportster has arrived and while he's had some tuning problems it will be great to have someone else on an HD. Noel.
 
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#905
ralt12 (User)
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Re:xrtt fairings 8 Years, 6 Months ago Karma: 0  
I know this is a very late post to the topic, but the frames on the XR and XRTT are very different, and it's pretty rare to find a XRTT frame, even a reproduction, relative to the dirt track frame. The difference in steering head angles will make the dirt track frame a handful relative to the XRTT frame while at higher speeds.
Airtech ( http://www.airtech-streamlining.com/ ) has been very responsive to my calls, and is providing a drum brake fairing for the XRTT that we'll take to Bonneville this summer (hopefully).
 
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#1360
barefoot (User)
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Re:xrtt fairings 5 Years, 5 Months ago Karma: 0  
This is even later to the topic but had to register to correct the above information :

No, the dirt frames and the roadrace frame are *not* "very different". In fact they are almost exactly the same. The roadrace frame has a slightly shorter swingarm and the steering head is dropped and the front forks are shorter. On Rayborn's bike the steering angle is tucked in a degree or so over the dirt trackers but as far as I know, no one else's was. That's about it.

The other misconception above is that "the dirt track frame [is] a handful relative to the XRTT frame while at higher speeds." I had a cafe racer with an ex-Lawwill dirt frame and a bone stock roadracer. Both had 18" wheels. If anything the road racer was a little squirellier at the top end. Mile racers go into the turn sideways at 130 mph. They are quite stable at high speeds. At that time, top speed on a road race XR was about 150. There's not that much difference. A flat track frame will be fine. I've ridden both - at Ontario. Flat out. No problem.
 
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Last Edit: 2012/05/21 08:42 By barefoot.
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