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17th August 2018
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Brass Nut
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Join Date: Feb 2005
Location: Western Weald
Posts: 44,958 Sportster/Buell Model: XL1200CB Sportster/Buell Year: 2015 Other Motorcycle Model: CRF250L Other Motorcycle Year: 2017
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Quote:
Originally Posted by Folkie
Can you do a stroker conversion on an Evo?
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Apparently you can, but I've never heard of anyone doing it.
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Folkie
Super Moderator
South East England Riders
There is nothing at the end of any road better than may be found beside it. Edward Thomas (1878 - 1917)
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17th August 2018
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: So Cal
Posts: 20,727 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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I think there is room on a rigid mount
Certainly no readily available cranks for a Rubbermount
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Thy Sportster Come
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On Earth as it is on Salt
2006 Sportster XL1250C
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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
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Max Power, 111.47
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Build by Jester Motorwerkz West
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17th August 2018
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Brass Nut
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Join Date: Feb 2005
Location: Western Weald
Posts: 44,958 Sportster/Buell Model: XL1200CB Sportster/Buell Year: 2015 Other Motorcycle Model: CRF250L Other Motorcycle Year: 2017
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I did a Google search and found someone who makes one (for solidmounts).
Just puzzling over hammer6315's comment:
Quote:
Originally Posted by hammer6315
Quote:
Originally Posted by rocketmangb
New updated oil pump (26204-91A) should be on the list
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I like strokers; very pleasant midrange power.
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17th August 2018
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: So Cal
Posts: 20,727 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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Yes
Was unusual if not cryptic !
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17th August 2018
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A Million Facts & Figures
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Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,932 Sportster/Buell Model: XL883 Sportster/Buell Year: 2007 Sportster/Buell Model #2: Buell Cyclone Sportster/Buell Year #2: 1999
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The most popular stroker kit is the S&S 89" ... 3-5/8 bore x 4-5/16 stroke. Not available for rubber mounts.
The reason you don't see a lot of them is because they make the motor taller. The cylinder height is 5.087", where the stock cylinder is 4.650". So the motor ends up taller, which causes issues with fitting in the frame, as well as requiring a custom exhaust, wide intake manifold, bracketry mods, long pushrods, etc. And they still require case boring like the 88/90 inchers, albeit not as big.
By comparison, an 88 or 90 incher comes out stock height and doesn't introduce all those problems. So they're much more popular.
Bore area and stroke make equal contributions to torque. So it's not like doing an 89 incher at 3.625 x 4.313 makes more torque than a 90 incher done at 3.875 x 3.813. In fact, at equal cylinder pressure the stroker will make a little less torque, since it's a smaller motor. The bigger bore does however create more room for valves, and therefore has the potential for better cylinder fill, particularly at high rpm. It's just an all-around better way to do it.
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17th August 2018
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Brass Nut
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Join Date: Feb 2005
Location: Western Weald
Posts: 44,958 Sportster/Buell Model: XL1200CB Sportster/Buell Year: 2015 Other Motorcycle Model: CRF250L Other Motorcycle Year: 2017
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As far as I can see, S&S doesn't sell (at least not currently) a stroker crank for solidmount Evos. The only Sportster stroker crank they list is # 32-3055, for 1977-E81 Ironheads.
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17th August 2018
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A Million Facts & Figures
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Join Date: Jan 2005
Location: Famous Potatoes
Posts: 9,932 Sportster/Buell Model: XL883 Sportster/Buell Year: 2007 Sportster/Buell Model #2: Buell Cyclone Sportster/Buell Year #2: 1999
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Page 337 of the 2018 catalog:
They've been offering that 89incher for about forever. AirBozo here on the forum has one. I made him a manifold for it.
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17th August 2018
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Brass Nut
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Join Date: Feb 2005
Location: Western Weald
Posts: 44,958 Sportster/Buell Model: XL1200CB Sportster/Buell Year: 2015 Other Motorcycle Model: CRF250L Other Motorcycle Year: 2017
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I stand corrected. They don't list it in their web catalogue.
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17th August 2018
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XL FORUM TEAM MEMBER
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Join Date: Nov 2016
Location: Cocoa, FL
Posts: 97 Sportster/Buell Model: XL1200S Sportster/Buell Year: 1996
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Quote:
Originally Posted by rocketmangb
I would do the clutch as well
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Added with a note. I'll upgrade mine when I replace the carb & manifold unless I need it before then.
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18th August 2018
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XL FORUM TEAM MEMBER
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Join Date: Dec 2014
Posts: 201 Sportster/Buell Model: XLH883 Sportster/Buell Year: 2006 Sportster/Buell Model #2: 2005 XL1200Custom
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Quote:
Originally Posted by Folkie
Can you do a stroker conversion on an Evo?
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Talking Sportsters now, S&S sells stroker kits for evo Sportsters up to 2004. Nothing for rubber mounted Sportsters. I called them a year or two about this situation, and they did not know when or if they would offer them. Wa-Wa!
Last edited by hammer6315; 18th August 2018 at 04:08..
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