What is the main benefit of the included S&S crankcase breather reed valve?

The S&S crankcase breather reed valve is designed to help eliminate oil carry-over and oil scavenging problems. This feature contributes to a cleaner-running engine and can help prevent issues related to excess oil in the crankcase.

Does this crankcase assembly require special tools for installation?

While this crankcase is designed for direct fitment with stock components, installation of engine components typically requires specialized tools and mechanical knowledge. Refer to the manufacturer's installation instructions for a detailed list of required tools and procedures.

What is the finish on this crankcase assembly?

This S&S Cycle crankcase assembly features a sleek black finish. This provides a bold, custom look that is ideal for both motorcycle restorations and custom builds.

S&S Cycle Stock Bore Crankcase Assembly 31-0172A

Name: S&S Cycle 99-06 BT Stock Bore Crankcase Assembly
Brand: S&S Cycle
SKU: s-s-cycle-s-s-cycle-99-06-bt-stock-bore-crankcase-assembly-t14-663815
Price: 2219.06 USD
Availability: BackOrder

S&S Cycle 99-06 BT Stock Bore Crankcase Assembly

$2219.06

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 99-06 BT Stock Bore Crankcase Assembly. Provides a solid foundation for your engine build with direct compatibility for stock components.

Key Features

Fits 1999-2006 Big Twin motorcycles.
Rear motor mount bolts directly to the stock transmission.
Fully compatible with stock primary, charging system, and other stock components.
Includes S&S crankcase breather reed valve to help eliminate oil carry-over and scavenging problems.
Finished in a sleek black for a custom look.

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Product Details

The S&S Cycle Black Stock Bore Alternator Crankcase Assembly is built with a strong foundation in mind, featuring a rear motor mount that bolts directly to your stock transmission. This design ensures full compatibility with your motorcycle's stock primary, charging system, and other essential components, making it a reliable core for your engine rebuild or custom project. The sleek black finish adds a bold, custom look, perfect for both restorations and unique builds.

This crankcase assembly includes an S&S crankcase breather reed valve. This is a notable feature designed to help eliminate oil carry-over and oil scavenging problems, contributing to a cleaner-running engine. By integrating this advanced breather system, S&S Cycle aims to improve the overall health and performance of your engine's internal components. The precise fitment means you can build your engine on a dependable base, knowing that the critical crankcase is well-made and ready for the demands of the road.

When you're building or rebuilding your Big Twin engine from 1999 to 2006, starting with a solid crankcase is crucial. This S&S Cycle assembly offers that dependability, allowing you to focus on the other aspects of your build. Its compatibility with most stock components simplifies the process, whether you're aiming for a faithful restoration or a completely custom machine.