S&S Cycle 128" Power Package Big Bore Kit for Milwaukee-Eight
S&S Cycle 128" Power Package Big Bore Kit for Milwaukee-Eight
About this product
About this product
Unleash the full potential of your Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 128" Power Package Big Bore Kit. This comprehensive bolt-in big bore kit transforms your 114" or 117" CVO engine into a formidable 128" powerhouse, delivering significant performance gains and a thrilling riding experience.
Description
Engineered for motorcycle enthusiasts seeking a substantial power upgrade, the S&S Cycle 128" Power Package is a complete, high-performance cylinder kit designed for Milwaukee-Eight models. This kit provides a massive displacement increase from 114" or 117" CVO engines to a robust 128", enhancing horsepower and torque across the entire RPM range. A key advantage of this bolt-in big bore kit is its true bolt-in design, meaning no case machining is required for installation, simplifying the upgrade process significantly. The kit features durable forged pistons, ensuring long-lasting reliability under demanding conditions. It comes complete with an S&S oil pump/cam plate, Quickee pushrods with chrome covers, new tappets, tappet cuffs, an S&S 550 camshaft, and high-performance valve springs, providing a holistic engine overhaul. With a high 11.1:1 compression ratio and precision-machined 4.250" bore and 4.500" stroke, this kit is engineered for optimal combustion and maximum power output. The striking black finish with highlighted fins adds a custom aesthetic to your engine, making your bike stand out, truly delivering a superior Harley-Davidson Milwaukee-Eight performance upgrade.
Features & Highlights
- Massive Displacement Increase: Transform your 114" or 117" CVO Milwaukee-Eight engine into a potent 128" power plant, delivering exhilarating horsepower and torque.
- Effortless Bolt-In Installation: Enjoy a straightforward upgrade process with no complex case machining required, saving time and effort.
- Superior Durability & Performance: Equipped with robust forged pistons and an S&S 550 camshaft, ensuring enhanced engine longevity and a significant boost in power.
- Complete Engine Upgrade: Includes an S&S oil pump/cam plate, Quickee pushrods with chrome covers, tappets, tappet cuffs, and high-performance valve springs for a comprehensive overhaul.
- Optimized Compression: Achieves an impressive 11.1:1 compression ratio, coupled with a 4.250" bore and 4.500" stroke, for peak engine efficiency and power delivery.
- Aggressive Aesthetic: Features a black finish with highlighted fins, adding a custom, high-performance look to your motorcycle's engine.
Important to Know
- Not for 121" CVO models.
- Not for any Trike models.
- Intake/rocker cover gaskets not included.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Specifications
310-1101C
Black, Highlighted Fins
Power Package
Performance Kit
4,250"
11,1:1
128"
4,500"
298.45 mm
490.855 mm
682.625 mm
Chain
Quickee Pushrods w/Chrome Covers, Cam Chain Tensioner
Kit
Water Cooled
Reviews


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.
Based in Denmark
Fast customer support
Over 100.000 Products
2-Year Full Warranty
Your peace of mind is our priority. Every product in our shop comes with a comprehensive 2-year warranty, so you can hit the road with full confidence.
Support in Danish, Swedish, German & English
Whether you are upgrading your exhaust or choosing a new helmet, our team of seasoned riders is ready to provide professional guidance for your specific bike.
Free Shipping Over 200€ (EU)
Shop your favorite gear without worrying about extra costs. We offer free shipping on all orders over 200€ (EU), ensuring your parts reach you safely and affordably.
Authorized Parts Europe Dealer
As a certified Parts Europe supplier, we guarantee 100% authentic, high-quality motorcycle parts and accessories directly from the world's leading manufacturers.

