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XR Sportster Motorcycle Talk - XR750, XR1000, XR1200 For XR Sportsters: XR750, XR1000, XR1200

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  #1  
Old 31st August 2017
sportstercra sportstercra is offline
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Join Date: Aug 2017
Posts: 3
Sportster/Buell Model: XR-750
Sportster/Buell Year: 1971
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1969
Reputation: 10
sportstercra is an unknown quantity at this point
Default XR 750 real or replica?

I was interested in purchasing a genuine XR-750, but wondered what to look for to differentiate between a replica and a real one.
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  #2  
Old 31st August 2017
Veeflys Veeflys is offline
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Sportster/Buell Model: 883N
Sportster/Buell Year: 2016
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Hello, is the XR-750 from a private seller? is it a craigslist item? is it from a shop? Do you have pictures or are you just starting your search?

Veeflys
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  #3  
Old 31st August 2017
sportstercra sportstercra is offline
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Join Date: Aug 2017
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Sportster/Buell Model: XR-750
Sportster/Buell Year: 1971
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1969
Reputation: 10
sportstercra is an unknown quantity at this point
Default

Thanks for replying. I have just started looking. I see some running low straights and single carbs, and I wondered if they ever came that way, or if they have been reduced to one carb for ease of tuning. I want it street legal. It doesn't bother me to buy one that has headlight, taillights, license plate bracket added. I want to be able to ride it, and not worry about the constables.
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  #4  
Old 5th September 2017
45Brit 45Brit is offline
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Sportster/Buell Model: XL
Sportster/Buell Year: 1992
Sportster/Buell Model #2: 1978 XLCH project
Other Motorcycle Model: Sportster XLH
Other Motorcycle Year: 1975
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Default

Most obviously, the engine number.

Genuine pre-XR bikes like the XLR have low straights and single carbs on the iron 883cc engine. Very rare. Genuine racing engines would have had front mounted magnetos and no charging system. XLR models have the central, horseshoe shaped oil tank and no battery mounting, single saddle and short rear mudguard.

https://postimg.org/image/s8xe5lssl/

Genuine XRs with low straights and single carbs would be the early, iron-engine 750cc bikes. Very rare. Genuine racing engines would have had front mounted magnetos and no charging system. XR bikes have the triangular central alloy oil tank and triangulated frame, with flat track type seat.

https://postimg.org/image/qfuhha7lx/

Most iron engine bikes with low straights and single carbs will be "look-alikes" with 883cc or 1000cc engines. These are converted road bikes. Any such bike with a side-mounted magneto and front mounted generator is probably a converted XLCH. Any bike with left shift, is a converted road bike, as is any bike with nose-cone points ignition and/or alternator electrics

https://postimg.org/image/amukxxr0l/

https://postimg.org/image/qjoaxjd39/

Later iron engine bikes have a triangulated style rear frame which is based on the XR type, with triangular steel oil tanks and inset battery trays. These are road bikes.

The rare XR1000 is a factory model with left-side exhaust and twin right side carbs, plus Sportster style left foot shift, nose cone points and alternator, in Sportster running gear. This is a factory road bike, they are sought after by collectors and priced accordingly.

Any Evolution engined bike, of any sort, is a converted road bike, or an XR1200 which is a factory model. The 883cc 883R wasn't a racing model as such, but there WAS a factory sponsored racing series for them at one time, including various special parts listed under the Screaming Eagle range.

https://postimg.org/image/dkmhuiscl/


The later XR1200 wasn't a racing model, although there was a factory-sponsored road racing series for them, at one time.
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  #5  
Old 5th September 2017
sportstercra sportstercra is offline
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Join Date: Aug 2017
Posts: 3
Sportster/Buell Model: XR-750
Sportster/Buell Year: 1971
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1969
Reputation: 10
sportstercra is an unknown quantity at this point
Default

Thanks for replying Brit45.
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  #6  
Old 20th October 2017
maltesefalcon maltesefalcon is offline
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Quote:
Originally Posted by sportstercra View Post
Thanks for replying. I have just started looking. I see some running low straights and single carbs, and I wondered if they ever came that way, or if they have been reduced to one carb for ease of tuning. I want it street legal. It doesn't bother me to buy one that has headlight, taillights, license plate bracket added. I want to be able to ride it, and not worry about the constables.
A genuine race bike will not be street legal. For instance, no front brake, race exhaust, no lights, no starter, no charging system.
Modification will be costly and actually degrade the value of a genuine racer if there is documented race history.

Race cams, lightened flywheels 1/8 turn throttle and race only dirt tires do not bode well for a streetable ride either.

It would be cheaper and easier to buy a well used street bike and build a flat tracker. There are frames, tanks and seats available to make a convincing replica, if you use an Ironhead motor. Or you can use XR1000 motor if you can find one.

You can even buy aftermarket heads for the twin carb setup like current XRs. I think Sputhe Engineering sold them at one point but I will double check.

You should also be wary. If its fairly easy to build a streetable replica its also fairly easy to build a fake "racer". Only 100 Ironhead XR750 complete bikes were ever finished, yet you see them for sale online fairly often for big big bucks. If you really pursue the racer to street route, make sure you get the real thing.
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Last edited by maltesefalcon; 21st October 2017 at 00:57..
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