Product Description
S&S CYCLE Breather Reed Valves – Crankcase – +0.030″ Oversize – Evolution Big Twin ’93-’99
Key Features
- New-style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and close when pressure in the cam chest is equal to or greater than pressure in the crankcase
- By opening and closing “on demand,” the reed valves automatically compensate for lag time associated with accelerating the mass of air as it is forced out of the crankcase, increasing performance and stopping high-rpm oil carryover in engines with marginal piston ring seal
- Installation is fast and simple; no aligning timing marks, and no rotating parts
- Made in the USA
Technical Specifications
- Weight: 0.20 lbs
- Supplier Number: 31-2100
- Unit of Measure: Each
Current Warehouse Inventory
Stock by Location:
- ✓ Janesville, WI: 5 units
- ✗ Batavia, NY: 0 units
- ✗ Dallas, TX: 0 units
- ✗ Fresno, CA: 0 units
- ✗ Reno, NV: 0 units
- ✗ Asheville, NC: 0 units
- ✓ National: 5 units
Total Available: 10 units
Inventory Last Checked: December 4, 2025 at 1:00 AM UTC
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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