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S&S Cycle 631 Cam For Harley Big Twin Evo 1984-1999

Name: S&S Cycle 631 Cam For Harley Big Twin Evo 1984-1999
Brand: S&S Cycle
SKU: 959708
Price: 299.95 USD
Availability: OutOfStock

Item: P274050

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S&S has been in the business of making Harley-Davidson motorcycles go fast for a very long time, and their innovation in the world of bumpsticks is no… Read More

How to Measure Crankshaft Runout When Choosing a Harley Cam : Weekend Wrenching

S&S Cycle 631 Cam For Harley Big Twin Evo 1984-1999

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How to Measure Crankshaft Runout When Choosing a Harley Cam : Weekend Wrenching

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Product Description

Part Numbers

Fitment

Installation

S&S 631 Cam For Harley Big Twin Evo

Features:

For high RPM in street and racing engines with 11:1 and higher ratios
Develops maximum performance from 4500 RPM on up
Great performance cam, but expect more "wear and tear" on valve train

631 Cam Info:

Designed for high-RPM applications
For all high-compression engines 11:1 and up compression
4500 RPM-6500 RPM
Incredible performance, but expect more wear and tear on your valve train components
Intake open/close 34°/61°
Exhaust open/close 66°/29°
Intake duration 275°
Exhaust duration 276°
Lift .630"

Product Style	J&P Cycles Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Product Style S&S Cycle 631 Cam For Harley Big Twin Evo 1984-1999	J&P Cycles Item #959708	Catalog Number432-636	Store Sku	MFR. Product #33-5080	AvailabilityOut of Stock

Fitment Notes & Exceptions

Installer must check for coil bind, valve-to-valve clearance, valve-to-piston clearance, and cam lobe to case clearance
Cam bearings and gaskets must be replaced when installing new cams
Works with solid or hydraulic lifters
High-lift valve springs are required to run this cam in all models

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S&S Cycle 631 Cam For Harley Big Twin Evo 1984-1999 Installation

Installation (pdf)

Product Description

Part Numbers

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Installation

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