Product Description
S&S CYCLE Roller Rocker Arms – 1.640 Rocker Ratio – M8
Key Features
- Designed usng Finite Element Analysis (FEA) and forged from 8620 steel for strength
- Eliminate thrusting on valves for decreased wear on the valve train
- Rocker geometry is better suited to high-lift camshafts
- Bushings are 50% longer than stock, increasing the time between rebuilds
- Oil is sprayed directly on the valve springs, reducing the potential for valves breaking due to overheating
- Compatible with stock or S&S CNC-machined heads
- Works well for cams with 0.540″
- Capable of 0.650″ max valve lift
- Made in the USA
Technical Specifications
- Weight: 4.20 lbs
- Supplier Number: 900-1084
- Unit of Measure: Set of 4
Current Warehouse Inventory
Stock by Location:
- ✓ Janesville, WI: 20 units
- ✓ Batavia, NY: 11 units
- ✓ Dallas, TX: 4 units
- ✗ Fresno, CA: 0 units
- ✓ Reno, NV: 7 units
- ✓ Asheville, NC: 15 units
- ✓ National: 20 units
Total Available: 77 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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