An easy and economic way to increase displacement of 883 and 1100 Evo Sportster models to 1200cc. This kit with 3-1/2” bore forged pistons only requires to bore the stock cylinders from 3 inch to 3-1/2 bore, or purchase new 3-1/2 inch bore cylinders. No combustion chamber modifications or flywheel rebalancing is necessary. Compression ratio will be a very streetable 9.5:1. The piston skirts are coated for reduced friction during break-in.
For 2004 and up models we recommend buying new S&S cylinders with 3-1/2” bore.
- fits Sportster 883 Evolution 1986→ and S&S Conversion Kits
- Conversion 883ccm→1200ccm
- nominal bore: 3-1/2 ”
- 74 in³
- compression: 9.5:1
- with rings, wristpins, and clips
S&S 883 → 1200 cc Conversion Kit
- pre-honed cylinders
and is ready to assemble out of the box. Installing this kit takes then same time as replacing a stock top end. It’s just more fun when you’re done.
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 09:00-16:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: firstname.lastname@example.org