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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2014
Posts: 6,681 Sportster/Buell Model: Xl1250S Sportster/Buell Year: 98 Other Motorcycle Model: Kawasaki Vulcan 500 Other Motorcycle Year: 95
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I don't see 9.1:1 anywhere?
04 883s were 8.9:1
1200s were 9.7:1
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14th August 2019
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Master Custom Bike Builder
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Join Date: Sep 2017
Location: United States
Posts: 3,054 Sportster/Buell Model: 1200/1250C Sportster/Buell Year: 05
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Quote:
Originally Posted by Hippysmack
I don't see 9.1:1 anywhere?
04 883s were 8.9:1
1200s were 9.7:1
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Huh? 04 1200 says 9.1
Quote:
Originally Posted by shanneba
Here is what I found in the Owner's Manual Specs (2003, 2004. 2007), Sportster Pedia (cam changes) and Hammer (head changes)
Code:
+------+--------+-------------+----------+------+---------+---------------------------+-------------------+
| | | compression | torque | | | | |
| | | ratio | Ft / Lbs | rpm | | | |
| 2003 | 883 | 9.0 | 49.0 | 4500 | D cams | | |
| | 1200 | 9.0 | 68.0 | 4000 | D cams | | |
| | 1200 S | 10.0 | 72.0 | 4000 | W cams | | |
| | | | | | | | |
| 2004 | 883 | 8.9 | 51.0 | 4300 | D cams | | |
| | 1200 | 9.1 | 79.0 | 3500 | W cams | Head change 62 cc chamber | larger 7mm valves |
| | | | | | | | |
| 2007 | 883 | 8.9 | 55.0 | 3500 | W cams | | |
| | 1200 | 9.7 | 79.1 | 4000 | W cams | | |
+------+--------+-------------+----------+------+---------+---------------------------+-------------------+
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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2014
Posts: 6,681 Sportster/Buell Model: Xl1250S Sportster/Buell Year: 98 Other Motorcycle Model: Kawasaki Vulcan 500 Other Motorcycle Year: 95
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My bad.
I thought you were talking about the wiki.
I haven't been able to verify the others yet.
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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2013
Location: Franklin, Indiana
Posts: 2,391 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2013
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The 2004 1200 and 1200R are both listed at 9.7:1 in the owners manual. My mistake in the chart earlier.
https://serviceinfo.harley-davidson....f7d60410!!1!18
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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: So Cal
Posts: 22,196 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2006 Sportster/Buell Model #2: XL1200C Sportster/Buell Year #2: 2006 Other Motorcycle Model: 48 "Totalled" By a Douche Other Motorcycle Year: 2012
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__________________
Thy Sportster Come
It Shall Be Done
On Earth as it is on Salt
2006 Sportster XL1250C
Hammer Sledge Heads 1.98X1.61 Valves
Hammer 600 Cams
Big Ass CP/Hammer Pistons
Mikuni HSR 45 /Hammer Billet Manifold (Now HSR 48)
Jetted 27.5 slow,182.5 Main
97 Needle,Clip posistion 3
Hurricane Flow 3" offset AC,Rocketman Mod
Daytona Twin Tec TC88A,Rico Scarecrow Map
Sumax Thundervolt plug wires,NGK DCPR8EIX spark plugs. Gapped .040 and Indexed
Cycle Electric Stator and Regulator
Alto Carbonite Clutch (now with Barnett Pressure plate and 25% stiffer spring)
Royal Purple 20W50 MC Primary oil
Patriot Defender Pipe
Royal Purple 20W50 MC Engine Oil
Napa 7148 oil filter
Max Power, 111.47
Max Torque, 84.39
Best 1/4 Mile ET to date 11.85
Best 1/4 Speed to date 115.14
Build by Jester Motorwerkz West
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14th August 2019
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Senior Chief Harley Engineer 2nd Class
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Join Date: Dec 2015
Posts: 1,633 Sportster/Buell Model: Sportster 883 Hugger Sportster/Buell Year: 1988
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Quote:
Here is what I found in the Owner's Manual Specs (2003, 2004. 2007), Sportster Pedia (cam changes) and Hammer (head changes)
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Shanneba, the quoted torque figures seem to have remained broadly consistent over the years which is what you might expect.
I was talking about BHP. Not so easy to find power figures, so I used the EPA motorcycle emissions data download from 2015 -
then converted to BHP from KW.
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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2014
Posts: 6,681 Sportster/Buell Model: Xl1250S Sportster/Buell Year: 98 Other Motorcycle Model: Kawasaki Vulcan 500 Other Motorcycle Year: 95
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Quote:
Originally Posted by shanneba
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Thanks for the link.
I'm almost done with Evos but they don't have 2001 info there that I could find.
If any body has that info, I need to verify it before plugging it in.
Quote:
Originally Posted by Four Speed
Shanneba, the quoted torque figures seem to have remained broadly consistent over the years which is what you might expect.
I was talking about BHP. Not so easy to find power figures, so I used the EPA motorcycle emissions data download from 2015 -
then converted to BHP from KW.
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Can you show us how to go about finding that info and calculating?
Quote:
Originally Posted by rocketmangb
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I need a dyno chart for dummies course. 
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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2008
Posts: 10,214 Sportster/Buell Model: 1200s Sportster/Buell Year: 2001 Sportster/Buell Model #2: xlch Sportster/Buell Year #2: 1974
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from my owner's manual 2001

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14th August 2019
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XL FORUM TEAM MEMBER
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Join Date: May 2017
Location: Lubersac/France
Posts: 1,758 Sportster/Buell Model: 1200c Sportster/Buell Year: 2005
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My '05 owners handbook says
883.. 51.0ft lbs@4300rpm comp' ratio 8.9-1
1200.. 79.0ft lbs@3500rpm comp ratio 9.7-1
__________________
"Procrastination is the thief of time"................90's Harley ad.
"Don't wait for your ship to come in, swim out and meet the bloody thing".................Barry Sheene.
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15th August 2019
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XL FORUM TEAM MEMBER
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Join Date: Jul 2014
Posts: 6,681 Sportster/Buell Model: Xl1250S Sportster/Buell Year: 98 Other Motorcycle Model: Kawasaki Vulcan 500 Other Motorcycle Year: 95
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Thanks guys,
I got 86 up except 2011, 2014, 2017,2018 and 2019.
I'll use this also this to finish filling in the individual history sections when I can get back to them.
Officially we know that the MoCo stopped including BHP in 2001 and torque values in 2011 or 2012.
Quote:
Originally Posted by Four Speed
Not so easy to find power figures, so I used the EPA motorcycle emissions data download from 2015 -
then converted to BHP from KW.
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Can you show us how to go about finding that info and calculating?

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