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

S&S Cycle cylinder and piston kit for Harley-Davidson Sportster models, featuring a 3-9/16" bore with wrinkle black finish and 4.650" cylinder length. Direct fit for 1986–2021 Sportster engines seeking displacement and compression increases.

Features

• 3-9/16" bore diameter
• 4.650" cylinder length
• Wrinkle black finish
• Includes pistons and cylinders

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0697
• 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 — S&S has stated these cylinders are not compatible with XR1200 models.

Do I get both cylinders and pistons in this kit?

Yes — the kit includes matched cylinder and piston sets ready to install.

What bore size is this?

3-9/16" bore, a popular displacement increase for Sportster builds.

Do I need to hone the cylinders before installation?

Cylinders ship slightly under-sized and not honed. Have them properly honed by a machine shop to match your pistons before assembly.

Will this work on my 1985 or older Sportster?

This kit is for 1986 model year and newer. Earlier Sportsters require different cylinder specifications.