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26th May 2023
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Biker
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Join Date: Mar 2014
Posts: 41
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Jets.
Please can you tell me what size jets you all use in a 86-91 883 sportster xlh. My manual says main 160, slow 52. But here in the uk I dont seem to be able to find them sizes. Its running a harley carb (non cv) stamped 883 gua 15. I cant see what sizes are in now as the numbers are unrecognizable. Do I go up to the nearest size or down etc. Its also got baffled cocktail shaker pipes. I know its probably gonna be trail and error to get it right. Cheers, Dylan.
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26th May 2023
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XL FORUM TEAM MEMBER
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Join Date: Feb 2009
Location: ny
Posts: 995 Sportster/Buell Model: sportster stroker xlch Sportster/Buell Year: 1970 Sportster/Buell Model #2: sportster xlh Sportster/Buell Year #2: 1973 Other Motorcycle Model: 99 inch sportster Other Motorcycle Year: 2003
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86-87 standard was 52/155
What year is you bike?
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26th May 2023
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Chief Harley Engineer
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Join Date: Dec 2022
Location: Piedmont North Carolina
Posts: 510 Sportster/Buell Model: XL 1200 Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL 1200 Sportster/Buell Year #2: 1993 Other Motorcycle Model: H-D FLH Other Motorcycle Year: 1980
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Generally, with more open pipes, or even a box stock bike, making the intermediate jet larger will improve driveability and prevent the Keihin Ka-sneeze. For your carb, if it is the original, there is an auxiliary intermediate circuit, and the best intermediate jet size will be somewhere between the stock size and .75 or .76. Anything larger will not work in my experience. Main jet may not need any change from stock. You need to find a range of jets and do some tuning.
Jim
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26th May 2023
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Biker
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Join Date: Mar 2014
Posts: 41
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My bike is 86.
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27th May 2023
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Chief Harley Engineer
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Join Date: Dec 2022
Location: Piedmont North Carolina
Posts: 510 Sportster/Buell Model: XL 1200 Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL 1200 Sportster/Buell Year #2: 1993 Other Motorcycle Model: H-D FLH Other Motorcycle Year: 1980
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Here are some H-D part # to help with your search:
Low jet:
27896-79... .65mm
27894-78... .68mm
27895-78... .70mm
27372-80... .70mm
27897-78... .72mm
27382-77... .75mm
Main jet:
27888-78... 1.60mm
27898-78... 1.65mm
Jim
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27th May 2023
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Biker
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Join Date: Mar 2014
Posts: 41
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Cheers JB.
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