Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Air and Fuel› Performance Packages

S&S Cycle

883 to 1200 Big Bore Conversion Kit

Name: 883 to 1200 Big Bore Conversion Kit
Brand: S&S Cycle
SKU: 910-0296
Price: 1128.95 USD
Availability: InStock

$1,128.95

SKU: 910-0296

Special Order

Ships in 4–6 weeks

Free Shipping over $200

$100 Minimum Order

30 Days Return

DIY PRO SHOP

Advanced — 4+ hours

Overview

The S&S Cycle 883 to 1200 conversion kit is a big bore kit designed to increase your Sportster's engine displacement. This kit provides an increase from 883cc to 1200cc, offering more power. It is available in wrinkle black and silver powdercoat finishes.

Show original supplier description

This comprehensive kit directly addresses the desire for more power by increasing the engine's displacement from the stock 883cc to a robust 1200cc. The kit includes precisely matched cylinders, pistons, and all necessary gaskets, including head, base, and exhaust gaskets. The pistons are pre-fit to the cylinders, meaning they are ready for assembly right out of the box, saving considerable time and effort. The 3 1/2 inch big bore cylinders, when used with stock 883cc heads, achieve a 9.4:1 compression ratio. This conversion kit is proudly Made in the USA and is available in an attractive wrinkle black or silver powdercoat finish to match your motorcycle's aesthetic. This conversion kit is specifically designed for Harley-Davidson Sportster models from 1986 to 2017, ensuring a precise fit and optimal performance for that range.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	S&S Cycle
Part Number	910-0296
Category	Air and Fuel

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy