Product Description
S&S CYCLE Crankcase – 3.937″ Bore – Alternator Style – Wrinkle Black – Dyna
Key Features
- 4.125″ bore crankcase can be used as a foundation for a custom engine or replacement for T111, T124, or T143
- Stock looking, but stronger; thicker wall sections and superior 356-T6 aircraft grade aluminum
- Tough powder coat finishes
- Reinforced front motor mount for extra strength
- Timken® sprocket shaft bearing – Strong enough for the most demanding applications
- Clearanced for strokes up to 4-3/16″ and cams up to 0.720″ lift
- Includes pinion and Timken® bearing
- Manufacturer’s Statement of Origin (MSO) included
- Includes studs and cam bearings installed
- Crankcases are specially machined for the new S&S oil line installation kits sold separately
- Made in the USA
- Requires oil supply line installation kit.
Technical Specifications
- Weight: 35.80 lbs
- Supplier Number: 310-0878
- Unit of Measure: Each
Current Warehouse Inventory
Stock by Location:
- ✓ Janesville, WI: 4 units
- ✗ Batavia, NY: 0 units
- ✗ Dallas, TX: 0 units
- ✗ Fresno, CA: 0 units
- ✗ Reno, NV: 0 units
- ✗ Asheville, NC: 0 units
- ✓ National: 4 units
Total Available: 8 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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