What does the .030in oversize mean for this breather gear?

The .030 inch oversize designation means this gear is slightly larger than a standard breather gear. It's intended to be used when the hole in your engine case where the breather gear sits has worn out to a .030 inch larger diameter, requiring a gear of that specific size to fit correctly.

Does this kit include any other parts besides the gear?

This product listing is for the S&S Cycle breather gear itself. It is designed as a direct replacement for the gear component. Always refer to the product details to confirm what is included in the kit.

What is the typical application for an oversize breather gear?

An oversize breather gear is typically used as a repair solution when the original bore in the engine case for the breather gear has become worn or damaged. Installing an oversize gear allows for a proper fit and function without needing to machine or replace the entire engine case.

S&S Cycle Breather Gear Kit .030in Oversize 33-4260

Name: S&S Cycle 77-99 BT .030in Breather Gear Kit
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-77-99-bt-030in-breather-gear-kit-t14-663073
Price: 229.95 USD
Availability: BackOrder

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

$229.95

On Backorder — Expected to ship by May 7, 2026

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

S&S Cycle breather gear kit for 1977-1999 Big Twin. This .030in oversize gear is for cases needing repair.

Key Features

Fits 1977-1999 Big Twin engines, including S&S SH-Series and V-Series.
This is a .030 inch oversize replacement gear.
Designed for use when the breather gear hole in the engine case requires an oversize repair.
Well-built component from S&S Cycle.

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Will this fit your vehicle?

Product Details

This is the S&S Cycle .030 inch oversize breather gear kit, designed for late 1977 through 1999 Big Twin engines. If your engine case has an oversized breather gear hole due to wear or previous repair, this gear is the correct replacement to ensure proper fitment and function. It's also suitable for S&S SH-Series and V-Series engines.

When the hole for the breather gear in your engine case has worn beyond its standard size, simply replacing it with another standard gear won't work. This .030 inch oversize gear is precisely manufactured to fill that larger hole, restoring the correct clearance and operation. This is a well-built component from S&S Cycle, a name known for reliable engine parts, ensuring it holds up to the demands of your engine.

This kit fits a wide range of Harley-Davidson models, including popular bikes like the Electra Glide Classic, Heritage Softail Classic, and Dyna Low Rider. Always refer to the full fitment list to confirm compatibility with your specific motorcycle.