S&S Cycle Cylinder & Piston Kits — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

S&S Cycle front cylinder for 2017 and newer Harley-Davidson Milwaukee-Eight (M8) models with a 4.250-inch bore. Cast iron construction with Black Granite finish and comes unhoned, ready for final honing to exact specifications during engine assembly.

Features

• 4.250-inch bore
• Unhoned finish for custom honing during build
• Black Granite cast iron construction
• 2017+ Milwaukee-Eight (M8) compatibility

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0735
• Bore Size: 4.250 inches
• Finish: Black Granite, unhoned
• Position: Front cylinder
• Weight: 1 lb
• Category: Engine Components / Piston Sets - Powersports

Fitment

Fits 2017 and newer Harley-Davidson Milwaukee-Eight (M8) models.

Frequently Asked Questions

What year Harley models does this cylinder fit?

2017 and newer Milwaukee-Eight (M8) models only. Twin Cam and older engines require different cylinder part numbers.

Why does it come unhoned?

Unhoned cylinders allow engine builders to hone to exact specs for their custom piston and ring combination, ensuring optimal ring seal and longevity.

Is this a complete piston kit or just the cylinder?

This is the cylinder only. Piston, rings, and other internal components must be ordered separately.

Can I install this myself, or do I need a machine shop?

Professional engine assembly with proper honing and fitting is strongly recommended. This is an internal engine component requiring precision work.