S&S Cycle Cylinder & Piston Kits — 1986-2021 Harley-Davidson Sportster Models

S&S Cycle cylinder and piston kit for Harley-Davidson Sportster, featuring a 3-9/16" bore with silver finish cylinders and matched pistons. Direct bolt-on upgrade for 1986–2021 Sportster models that increases displacement and power over stock.

Features

• 3-9/16" bore cylinders
• 4.650" cylinder length
• Matched piston set included
• Silver finish

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0693
• Bore: 3-9/16"
• Cylinder Length: 4.650"
• Weight: 24 lb
• Category: Engine Components / Piston Sets - Powersports

Fitment

Fits 1986–2021 Harley-Davidson Sportster models. Not compatible with XR1200 models.

Frequently Asked Questions

Will this fit my XR1200?

No — this kit is not compatible with XR1200 models. Contact S&S Cycle for XR1200-specific piston and cylinder options.

Do I need a tuner or carburetor changes?

Engine modifications of this scale typically require rejetting or EFI tuning for proper air/fuel ratio and performance.

Is professional installation required?

Yes — cylinder and piston installation requires engine disassembly and proper torque specifications. Have a qualified shop handle the work.

What year Sportster do I have?

This kit fits any Sportster 1986 through 2021 — check your VIN or title for the exact model year. If unsure, verify with your shop before ordering.