What does the .030in sizing mean for this breather reed valve?

The .030 inch sizing indicates that this valve is undersize. It's intended for use in Harley-Davidson Big Twin engines where the crankcase has been machined or bored out by .030 inches. This ensures a proper fit and seal in a modified engine.

What is the purpose of a breather reed valve in a Harley-Davidson engine?

The breather reed valve helps manage crankcase pressure. As the pistons move, they create pressure inside the crankcase. This valve allows that pressure to be vented in a controlled manner, which is essential for preventing oil leaks and ensuring the engine runs efficiently.

Does this breather reed valve come with installation hardware?

The manufacturer's description does not specify if installation hardware is included with this breather reed valve. It is recommended to refer to the manufacturer's installation instructions or consult with a mechanic to determine if any additional hardware is needed for your specific application.

S&S Cycle Breather Reed Valve .030in 31-2100

Name: S&S Cycle 84-99 BT Breather Reed Valve - .030in
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-84-99-bt-breather-reed-valve-030in-t14-662591
Price: 173.76 USD
Availability: BackOrder

S&S Cycle 84-99 BT Breather Reed Valve - .030in

$173.76

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle .030in breather reed valve for 1993-1999 Harley-Davidson Big Twin models. Direct fit.

Key Features

Fits 1993-1999 Harley-Davidson Big Twin models.
This is a .030 inch undersize breather reed valve.
Designed for use in rebuilt or modified crankcases.
Helps ensure proper crankcase pressure venting.
From S&S Cycle, a well-known manufacturer of motorcycle engine parts.

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Will this fit your vehicle?

Product Details

When you're rebuilding the crankcase on your Harley-Davidson Big Twin from 1984 to 1999, getting the breather system right is key to proper engine function. This S&S Cycle breather reed valve is designed to replace the stock unit and is specifically sized at .030 inches undersize, which is important if you're working with a bored or modified crankcase. It helps ensure your engine can properly vent crankcase pressure, which is crucial for performance and longevity.

This valve is a well-made component from S&S Cycle, a name known for its performance parts for Harley-Davidson motorcycles. It's built to fit a range of Big Twin models, including popular bikes like the Heritage Softail Classic, Dyna Super Glide, and Electra Glide Classic. The .030 inch undersize specification means it's intended for engines that have been machined to a larger bore size, ensuring a snug and effective seal. Proper crankcase ventilation prevents oil leaks and helps the engine run cooler.

If you're in the process of a top-end rebuild or addressing crankcase issues on your Big Twin, this S&S Cycle breather reed valve is a solid option. Make sure to confirm fitment for your specific Harley-Davidson model and year to ensure it's the right part for your project.