S&S KN, P, SH-Series Engines Owner Manual

Owner's manual with installation, oil, break‑in, tune‑up, and torque specifications for S&S KN, P and SH‑Series air‑cooled V‑twin engines.

S&S KN, P, SH-Series Engines Owner Manual - cover page
Brand
S&S
Category
Automotive supplies
Document type
User Manual
Language
English
Pages
28
File format
PDF
File size
1.2 MB
Published
29 September, 2026
Updated
29 September, 2026
MD5 checksum
10088190C776F113D523605D344B74EE
PDF
S&S KN, P, SH-Series Engines Owner Manual PDF

About this manual

This manual provides detailed instructions for installing S&S KN, P and SH‑Series air‑cooled V‑twin engines, including safety warnings, oil line hookup diagrams, and recommended oil types. It also covers break‑in procedures, fuel requirements, and tuning information for optimal performance.

Technical data such as engine dimensions, torque values, wear limits, and specifications are listed, along with warranty information and contact details for S&S Cycle support.

What's inside

  • Introduction
  • Engine Installation
  • Oil Line Hook‑up
  • Oil Recommendations
  • General Break‑in Procedure
  • Tune‑up Information
  • Super Stock Ignition System
  • Engine Specifications
  • Torque Specifications
  • Specifications and Wear Limits

Specifications

Recommended oil viscositySAE 20W50
Optimal oil temperature range180–230 °F
Spark plug gap.038–.042 in
Rocker arm shaft retaining screw torque90 in‑lbs

Frequently asked questions

What type of oil should be used in the engine?

S&S recommends synthetic engine oil such as S&S Premium Synthetic 20W50, but a premium petroleum‑based oil like S&S Heavy Duty 20W50 or 25W60 is also acceptable.

How tight should the rocker arm shaft retaining screws be torqued?

They should be torqued to 90 in‑lbs and secured with Loctite® 243.

What is the recommended spark plug gap?

The spark plugs should be gapped between .038 and .042 inches.

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