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Keep & Kill
Last Post: Crusty
Posted On: 3 Hours Ago
Replies: 29,173
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1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: Jul 2020
Location: Victoria, BC Canada
Posts: 28 Sportster/Buell Model: XLH Sportster/Buell Year: 1976 Other Motorcycle Model: H-D Sprint Other Motorcycle Year: 1972
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76' XLH_Replace Keihin butterfly w/ CV carb
My 76' XLH1000 is all stock including exhaust system. Has original Keihin butterfly carb & works fine but just purchased a used oem H-D (Keihin) CV carb f/ a 1998 Evo. Carb looks almost new. Want to try out the CV. Have the flange adaptor and dual cable throttle. Any recommendations for main jet & pilot jet? What needle jet for best smooth running? Thanks for any help.
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1 Week Ago
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: N6C 1N3
Posts: 32,797 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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I can't answer from my own experience, but until someone else comes along check out this thread...
Ironhead 40mm CV Carb Swap Today
http://xlforum.net/forums/showthread.php?t=636098 |
1 Week Ago
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Drag Race Champion
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Join Date: Jun 2016
Posts: 397 Sportster/Buell Model: XLH1000 Sportster/Buell Year: 1977 Sportster/Buell Model #2: 2004 XLH1200Custom Other Motorcycle Model: 2007 FXDB Other Motorcycle Year: 2004
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The CV-40 jetting for an EVO Sportster will be a good starting point. 45 low and 170 main will get ya in the ballpark. Stock CV's have very (EPA) lean jetting. I suggest looking into a YOST POWER TUBE. That tube really smooths out the CV.
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1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: May 2019
Location: surrey, bc
Posts: 223 Sportster/Buell Model: xlch Sportster/Buell Year: 1972 Other Motorcycle Model: homebilt fxr Other Motorcycle Year: 80+
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88 sportster needle was common mod on bt
prolly want it on yer sporty too
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pete
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6 Days Ago
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Biker
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Join Date: May 2022
Location: Norway
Posts: 2 Sportster/Buell Model: XLCH 1000 Sportster/Buell Year: 1974 Other Motorcycle Model: Harley Davidson FLH 80 Other Motorcycle Year: 1979
Reputation: 10
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My '74 XLCH 1000 runs fine with 48 and 175 jets.
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5 Days Ago
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XL FORUM TEAM MEMBER
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Join Date: Dec 2014
Location: Crossville, Tn.
Posts: 322 Sportster/Buell Model: XLCH Sportster/Buell Year: 1969 Other Motorcycle Model: Triumph Sprint 900 Other Motorcycle Year: 1998
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CV Performance
I've been running a Keihin CV carb for maybe a year now. The above jetting suggestions are a good starting point. Try the "CVP Velocity needle" from CV Performance. Also poke around their website, lots of good info.
A single throttle cable should work fine.
__________________
"A kicker adds an enormous amount of cool class. You would have hot pretty young women hanging on you constantly. Men would be envious of that big thing sticking out of your bike. You would be on top of it all".........IronMick
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4 Days Ago
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Biker
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Join Date: May 2022
Location: Norway
Posts: 2 Sportster/Buell Model: XLCH 1000 Sportster/Buell Year: 1974 Other Motorcycle Model: Harley Davidson FLH 80 Other Motorcycle Year: 1979
Reputation: 10
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The only problem is the petcock if you have it on the right side. I had to replace mine with a 90 degree valve.
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4 Days Ago
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Master Custom Bike Builder
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Join Date: May 2013
Location: Middle O the Mitten
Posts: 3,083 Sportster/Buell Model: XLCH Sportster/Buell Year: 1977
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Not real difficult, except for sourcing all the parts...and a Worthwhile endeavor.
I much like the CV on a Shovelhead... However to UpGrade an Ironhead, I prefer to go Backwards to a Bendix...and Ride Happily ever after!!
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