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22nd October 2009
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Senior Master Custom Bike Builder
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Join Date: Nov 2004
Location: Philippines
Posts: 5,259
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Check these shock specs .. Seem Correct?
Is there a data base here on the XLForum that gives some of the specs of the various rear shocks?
I am interested in the comparison between the stock 04 1200R vs the 1200S rear shocks. I included the Ohlins on the bottom becuse I am considering these right now.
This is the info I have got, but don't know how acurate it is:
04 1200R Rear Shock:
13.25" Long
Spring Rate: 69 -116 lb / in
Stroke: 2.1"
1200S Rear Shock:
13.5" Long
Spring Rate: 54 - 78 lb / in
Stroke: 3.5"
Ohlins 36PL Rear Shock:
13.2" - 13.6" Long (Adjustable)
Spring Rate: 86 - 137 lb / in ... (this #03 spring seems about right for my bike and rider weight)
Stroke: 3.9"
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[COLOR="PaleTurquoise"].[/COLOR]
[B][COLOR=DarkRed]04 XL 1222R:[/COLOR][/B] [url]http://i127.photobucket.com/albums/p158/Turbo6ta/SideView-Large.jpg[/url]
NRHS Stage 2 Heads / NRHS 10.5-1 Thunderstorm Pistons / Zipper's 567 Cams / Mikuni HSR42 Carb
RevTech Roller Rockers / Andrews Adj. Pushrods / RB Racing 2-1 Exhaust / Twin Tec TC88A Ignition
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22nd October 2009
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Senior Master Custom Bike Builder
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Join Date: Dec 2006
Posts: 4,794 Sportster/Buell Model: 1200 Low Sportster/Buell Year: 2007 Other Motorcycle Model: Yamaha FZ1 Other Motorcycle Year: 2008
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04 1200R Rear Shock:
13.25" Long
Stroke: 3.25" as it hits a fairly firm bump stop
1200S Rear Shock:
13.25" Long
Stroke: 3" as it hits a fairly soft bump stop
Do a search for spring database from about two years ago for the spring rates. Both of those shocks have stock springs that are fairly soft for most applications.
AW
P.S. Nice bike in the Pic 
__________________
.
Regarding engine mods, it all depends what you are driven by......
Bling, bragging rights, silky smooth power delivery, a little more peak power, violent power delivery,
traction or wheelie limited acceleration, a sound that just drips testosterone or peace of mind that
everything is as perfect as you know how to make it.
When the racers get done doing the impossible the engineers get a chance to correct the errors in the model.
***My other addiction, running Megasquirt EFI ***
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22nd October 2009
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Senior Master Custom Bike Builder
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Join Date: Nov 2004
Location: Philippines
Posts: 5,259
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The reason I said the 04 XL 1200R rear shocks had 2.1" of stroke was because that's what it said on the H-D website for the bike back in 04.
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22nd October 2009
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Senior Master Custom Bike Builder
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Join Date: Aug 2006
Posts: 8,656 Sportster/Buell Model: XL1200 R Sportster/Buell Year: 2006
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Harley database of springs and shocks
I haven't read this thread in a long time, so I can't remember what is on it. There is a lot of infomation about shocks in the link in my signature.
http://www.hardracing.com/
A few guys have bought Ohlins shocks from Hard Racing, all were pleased. Contact them for spring and shock suggestions.
http://xlforum.net/vbportal/forums/s...d.php?t=632187
Contact Shoei in this link, you guys need to exchange shocks.
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Ricor test rider for IAS Shocks, Intiminators and Vibranators. Works Dual Rate fork springs, fork brace, Avon Venom X tires, loosen drive belt, and set frame rails level to floor. Read the "7 Pages of Suspension" thread in the Suspension Sticky Index to learn how to fix your suspension.
Last edited by XLXR; 22nd October 2009 at 08:05..
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22nd October 2009
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Senior Master Custom Bike Builder
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Join Date: Dec 2006
Posts: 4,794 Sportster/Buell Model: 1200 Low Sportster/Buell Year: 2007 Other Motorcycle Model: Yamaha FZ1 Other Motorcycle Year: 2008
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These are ballpark spring rates for a sporty with about 3" total shock travel. These assume fixed spring rate. You can split the difference when running duel rate springs.
a 100 lb rider needs 77.5#/in springs
a 150 lb rider needs 89.3#/in springs
a 200 lb rider needs 101#/in springs
a 250 lb rider needs 113#/in springs
a 300 lb rider needs 125#/in springs
a 350 lb load needs 147#/in springs (assumes that this is a 200# driver with a 150# passenger)
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