S&s Cycle 4" Big Bore Kit - Sidewinder

Unleash the true potential of your Harley-Davidson engine with the S&S Cycle Bolt-In Sidewinder® 4" Big Bore Kit. This kit transforms your existing engine into a powerhouse, delivering increased displacement and enhanced performance without the need for extensive modifications.

Description

The S&S Cycle Sidewinder® Big Bore Kit is engineered for a straightforward bolt-in installation, eliminating the need for machining, balancing, or splitting the crankcases. The innovative design allows for installation with the engine still in the frame, saving valuable time and labor. Featuring a cast ductile iron sleeve within a cast aluminum cylinder, this kit ensures superior heat transfer and optimal engine cooling. Specifically, the 88" engines are boosted to 100", while the 96" and 103" engines are boosted to a robust 110". A 10.5:1 compression ratio when paired with stock 85cc heads provides a streetable and dependable engine that responds exceptionally well to performance camshafts, offering a significant increase in power and torque throughout the RPM range. This complete kit includes everything needed for the upgrade, including cylinders, forged pistons, rings, piston pins, clips, and gaskets. Upgrade your Harley Davidson engine with the S&S Cycle 4 inch big bore kit and unleash its full potential.

Features & highlights

• Bolt-in installation: No machining or engine removal required.
• Increased Displacement: 88" engines boosted to 100", 96"/103" engines boosted to 110".
• Enhanced Cooling: Cast ductile iron sleeve in cast aluminum cylinder for superior heat transfer.
• Optimized Compression: 10.5:1 compression ratio for streetable performance.
• Complete Kit: Includes cylinders, forged pistons, rings, pins, clips, and gaskets.
• Forged Pistons: Offers exceptional strength and durability.

Technical specifications

• Brand: S&S Cycle
• Product Name: Cylinder and Piston Kit
• Type: Big Bore Kit
• Bore Size: 4.000"
• Stroke Length: 4"
• Displacement: 100"
• Compression Ratio: 10.5:1
• Color/Finish: Black

Important to know

• Not for use with S&S 79cc heads.

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

Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.

Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29

Best regards,
William Svendsen & Martin Høyer (Owners)