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14th October 2021
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XL FORUM TEAM MEMBER
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Join Date: Jul 2013
Location: Franklin, Indiana
Posts: 2,765 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2013
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Sportster S on the dyno
Edit: 4 pulls were 2 sport mode runs, a rain mode run and a standard mode run
Last edited by shanneba; 15th October 2021 at 13:32..
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14th October 2021
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Biker
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Join Date: Dec 2014
Posts: 74 Sportster/Buell Model: 1200XLC Sportster/Buell Year: 2007 Sportster/Buell Model #2: 883XL Sportster/Buell Year #2: 1986
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Those numbers seem to be lacking compared to what HD is claiming. Thanks for the information.
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Black Beauty - 2007 XL1200 Custom
Too many updates to list. Let's say I've spent more in upgrades than I paid.... but how many times over is your guess.
My 1275 Hammer Performance upgrade http://xlforum.net/forums/showthread.php?t=2078737 IT WAS DELETED BECAUSE OF HAMMER'S SHODDY QUALITY CONTROL
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14th October 2021
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XL FORUM TEAM MEMBER
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Join Date: Nov 2004
Location: jupiter fl
Posts: 2,906 Sportster/Buell Model: 1200C Sportster/Buell Year: 04
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__________________
04/07 1275 BFH heads Darkhorse XB crank .600 cams S&S 1.725 rockers S&S precision lifters BDL+15% clutch TC88A HSR-45 S&S 3" ac LSR 2-1
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21st October 2021
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XL FORUM TEAM MEMBER
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Join Date: Aug 2021
Posts: 7 Sportster/Buell Model: Roadster XL1200 Sportster/Buell Year: 2019
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Appreciate you posting the dyno sheet and details !
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3rd November 2021
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Professional 1-Upper
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Join Date: Sep 2021
Location: My Home
Posts: 31 Sportster/Buell Model: Sportster 883 Sportster/Buell Year: 1986 Other Motorcycle Model: Harley FXDLS Other Motorcycle Year: 2016
Reputation: 10
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Those power numbers aren't that surprising. Still heaps better than any sportster engine of years past.
Interested to see if the power plant remains the same or if it gets detuned for the following sportster models.
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South Texas
1986 Sportster "883" Track Bike
1986 Sportster XL1100 Backup Track Bike
I ride Harleys ironically.
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10th November 2021
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Chief Know It All
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Join Date: Sep 2013
Location: Escondido Ca.
Posts: 430 Sportster/Buell Model: xlh 883 hugger Sportster/Buell Year: 1997 Other Motorcycle Model: kz1000 z1r Other Motorcycle Year: 1978
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Quote:
Originally Posted by HawkeyeTX
Those numbers seem to be lacking compared to what HD is claiming. Thanks for the information.
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Seems legit to me. Harley is measuring power at the crankshaft. These are at the rear wheel.
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1275 cc 10.54:1 cr se heads .560 cams hsr42 dyna 2000p patriot defender 11.63@ 115 1/4
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10th November 2021
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XL FORUM TEAM MEMBER
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Join Date: Jan 2020
Location: Loxahatchee, FL (S. FL)
Posts: 1,808 Sportster/Buell Model: XLCH Sportster/Buell Year: 2003 Sportster/Buell Model #2: XL Sportster/Buell Year #2: 1981 Other Motorcycle Model: FXDC Other Motorcycle Year: 2013
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Fashion over function. Hope they sell a bunch of them, not my taste.
I'll stick with my 65 hp iron.
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Steve
'81 Andrews "Y" cams, K. Black 9-1 pistons
'03 1250 NRHS stage two Lightning heads, SE536 cams, mik flat slide 42
'01 Cyclone stock
'13 FXDC 96" stock
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28th January 2022
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: Camping by the lake
Posts: 2,883 Sportster/Buell Model: MAGGY Sportster/Buell Year: 1995 Sportster/Buell Model #2: HAMMRD Sportster/Buell Year #2: 2007 Other Motorcycle Model: BEAR Other Motorcycle Year: 2016
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Is there a calculation to get from the crank to the rear wheel? My hammer bike gets 112 to the rear so I am wondering how the MoCo would advertise it if they built it....
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If it was easy....anyone could do it....
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28th January 2022
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XL FORUM TEAM MEMBER
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Join Date: Jan 2011
Location: Kelso, Washington
Posts: 437 Sportster/Buell Model: XLCH Sportster/Buell Year: '68 Sportster/Buell Model #2: FXR Sportster/Buell Year #2: '89 Other Motorcycle Model: R50/5 Other Motorcycle Year: '73
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Get the numbers, do some math. The difference would be an approximate % of the loss.  |
31st January 2022
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: Camping by the lake
Posts: 2,883 Sportster/Buell Model: MAGGY Sportster/Buell Year: 1995 Sportster/Buell Model #2: HAMMRD Sportster/Buell Year #2: 2007 Other Motorcycle Model: BEAR Other Motorcycle Year: 2016
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Did one of your cats write that? 
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