What does '.030" oversize' mean for this breather gear?

This means the gear itself is manufactured to be 0.030 inches larger in diameter than a standard-sized breather gear. It's intended for use in engine cases where the bore for the breather gear has been machined out to this specific oversize dimension.

What is a breather gear and why is it important?

The breather gear is part of your engine's internal ventilation system. It helps manage crankcase pressure by allowing excess air and oil vapor to escape, which is crucial for preventing seal leaks and ensuring smooth engine operation.

Do I need any special tools to install this breather gear?

Installation typically requires disassembling the engine case to access the breather gear. While the gear itself is a direct replacement, specific tools for engine disassembly and reassembly, along with torque specifications, are necessary. Refer to the manufacturer's service manual for detailed installation procedures.

S&S Cycle Breather Gear .030" Oversize 33-4242

Name: S&S Cycle 77-99 BT .030in Breather Gear
Brand: S&S Cycle
Price: 199.95 USD
Availability: InStock

S&S Cycle 77-99 BT .030in Breather Gear

$199.95

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 .030" oversize breather gear for 1977-1999 Big Twin Harley-Davidson models.

Key Features

Fits 1977-1999 Big Twin Harley-Davidson models.
This is an oversize (.030") replacement breather gear.
Designed for use in engine cases where the breather gear hole has been bored oversize.
Helps ensure proper fitment and function after case repair or machining.
Manufactured by S&S Cycle, a well-known name in performance V-twin parts.

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Will this fit your vehicle?

Product Details

This S&S Cycle breather gear is .030 inches oversize, specifically made for late 1977 through 1999 Big Twin Harley-Davidson engines. It's designed to be used when the breather gear hole in the engine case has been bored out to accommodate an oversize gear as part of a repair or rebuild. This part is a solid option for restoring proper function when standard-sized components won't fit correctly.

When you're working on a Big Twin engine from 1977 to 1999, and you find the breather gear bore is out of spec, this .030" oversize gear from S&S Cycle is the direct replacement you need. It's built to fit cases that have been machined to accept this specific size, ensuring a snug and functional fit. This part is crucial for maintaining the correct oil flow and ventilation within your engine, especially after repairs that involve case machining.

This breather gear fits a wide range of Harley-Davidson Big Twin models, including popular bikes like the Dyna Super Glide, Heritage Softail Classic, and Road King. Always confirm fitment for your specific year and model to ensure you're getting the right part for your repair.