The Sport-Touring Kit is one of Zipper’s most popular kits for Milwaukee-Eight® engines! Make over 150 Ft-lbs and HP with your stock throttle body & manifold!
Developed for the experienced rider that wants touring reliability and the widest power curve in its class! The Sport-Touring kit matches our Stage II M8 headwork blueprinting with our Red Shift 548 camshaft and 4.25” cylinder kit that results in big power across the entire RPM range. Twist the throttle at nearly any RPM and you’re rewarded with immediate, seemingly effortless forward motion! The key to this great power is the carefully engineered combination of airflow, camshaft timing, compression, displacement and Zipper’s legendary commitment to testing and machining detail. All of these components are produced in-house at Zipper’s so you can be assured of the highest quality and reliable results!
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
The 128 Gen 2 Sleeper Kit is the entry level big bore kit that delivers powerful results with minimal parts changed. To keep the cost reasonable on this package, the Sleeper 128 kit uses your factory unmodified heads, along with the OEM throttle body and manifold. No cores needed to ship, just buy the kit in advance and install it once the motorcycle arrives on the lift. The Sleeper 128 kit is a huge gain in power, for just a cam & cylinder swap. The RS532 cam gives you immediate throttle response at any RPM, and shines across the board in this package.
If you prefer more top end rush, and a slightly later torque curve, you can upgrade this kit with a Red Shift Cams RS548 cam, but this does require higher lift valve springs. Both combinations are very similar to one another as the comparison graph shows, just a slight shifting of the powerband by the camshaft.
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
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