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S&S Cycle

S&S Cycle 883 To 1200 Conversion Kit For Harley Sportster 1986-2021

Item: P273184
13 Read 13 Reviews 1 Q&A Write a Review

Maybe you need more power from your 883. Maybe you're a handy type who realized he could buy an 883 and a big-bore kit cheaper than he could buy a 120… Read More

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Product Details

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

S&S 883 To 1200 Conversion Kit For Harley Sportster


  • Convert 883cc Sportster models to 1200cc
  • No need to balance since these pistons weigh the same as stock 883 pistons
  • Cylinder head modification is also not needed
  • The dished piston dome keeps compression down to a streetable 9.4:1 with stock 883cc heads
  • Installing this kit takes the same time as replacing a stock top end
  • Kit contains S&S Cycle 833-1200cc conversion pistons with rings and wristpins, S&S Cycle 3-1/2″ bore cylinders, cylinder head, base and exhaust gaskets, assembly lube and instructions

Note: The cylinder fin profile does not perfectly match the fins on 2004 and later stock heads, but the difference is not considered to be objectionable.

Note: S&S Cycle does not recommend boring 2004 and later 883cc cylinders from 3″ to 3-1/2″ bore to increase engine displacement to 1200cc due to the large taper on the bottom of the cylinder spigot. New cylinders are recommended.

Product Style J&P Cycles Item # Catalog Number Store Sku MFR. Product # Availability
Product Style Black J&P Cycles Item #958416 Catalog Number633-657 Store Sku MFR. Product #910-0296/910-0687 AvailabilityIn Stock: Ships in 1-2 business days
Product Style Silver J&P Cycles Item #958415 Catalog Number633-656 Store Sku MFR. Product #910-0301/910-0688 AvailabilityIn Stock: Ships within 24 hours
This product is vehicle specific.
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Fitment Notes & Exceptions
  • You will need to purchase rocker box cover, carburetor, and intake gaskets for most bikes in addition to the kit contents
  • These parts require a good deal of technical skill to install correctly - it is the responsibility of the person assembling the parts to check all clearances and assembly specifications
This Product Fits
Harley Davidson
Sportster Custom XL883C 1998-2009
Sportster Deluxe XLH883DLX 1989, 1990, 1991, 1992
Sportster Hugger XLH883HUG 1988-2003
Sportster Iron XL883N 2009-2022
Sportster Low/SuperLow XL883L 2005-2019
Sportster Roadster XL883R 2002-2012
Sportster XL883 2004-2009
Sportster XLH883 1986-2003
Product Description
Part Numbers
13 Customer Reviews
13 5/5
1 Questions & 1 Answers
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