Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
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  #1  
Old 12-07-2007, 04:47 PM
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Default engine design

Is there any difference between the 08 1200 roadster and the 1200 low as far as engine rpm, cam design ect? Thank you.
 
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Old 12-07-2007, 07:31 PM
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Default RE: engine design

i dont think so???
 
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Old 12-07-2007, 07:36 PM
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Default RE: engine design

The rev limiters are often set differently between the models.This is often published in the service manual. Normally the heads, pistons, cams, ignition are all the same. I think the Roadster has a different ignition.
 
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Old 12-08-2007, 12:39 AM
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Default RE: engine design

Is there any difference between the 08 1200 roadster and the 1200 low as far as engine rpm, cam design ect? Thank you.
No, all the 1200's have the same engine with the rubbermounts the only difference is the color on some models.
 
  #5  
Old 12-08-2007, 03:42 AM
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Default RE: engine design

No, all the 1200's have the same engine with the rubbermounts the only difference is the color on some models.
Yeah, the difference is in the frame, suspension, seats, etc. All peripheral items. The engines are pretty much exactly the same.
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Old 12-08-2007, 05:43 AM
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Default RE: engine design

ORIGINAL: Dale Franks

No, all the 1200's have the same engine with the rubbermounts the only difference is the color on some models.
Yeah, the difference is in the frame, suspension, seats, etc. All peripheral items. The engines are pretty much exactly the same.
[/align]
This is my understanding also. There are differences in the gearboxes between 883's and 1200's.
 
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Old 12-08-2007, 12:54 PM
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Default RE: engine design

This is my understanding also. There are differences in the gearboxes between 883's and 1200's.
If you mean gearing, then the 1200's are geared taller. However, the difference there is the sprocket, which can be changed. If you mean the actual transmission, then no the transmission are the same on 883's and 1200's. Although 04-05 had straight cut gear transmissions, while 06+ have helical gear transmissions. Now if you mean a difference in cam's, then 883's have different cams from 1200's in 04-06, but all 883 engines have the same cam and all 1200 engines have the same cam. In 2007+ both 883's and 1200's use the same cams.
 
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