S&S Cycle
S&S Cycle 99-06 BT Stock Bore Crankcase Assembly
SKU: S0GE 31-0172A
Description
Part #: 31-0172A
Build your engine on a strong, dependable foundation with the S&S Cycle Black Stock Bore Alternator Crankcase Assembly. Engineered for lasting durability and precise fitment, this crankcase delivers a reliable core for your motorcycle's engine components. Finished in sleek black, it not only performs but also adds a bold, custom look - ideal for both restorations and custom builds.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | S&S Cycle |
| Part Number | S0GE 31-0172A |
Videos
S&S Cycle - Installing The S&S TC3 Oil Pump and Cam Plate
How to Install: S&S Cycle Power Package (Part 2) Cam Chest Kit
Cam Replacement on a Harley Davidson Twin Cam, including Pushrod Removal • J&P Cycles
S&S Cycle - Twin Cam Head Breathers
Harley Twin Cam B Full Teardown for S&S Stroker Build - Basket Cases Ep. 4
S&S 124 Motor Install
Considering an S&S Crate Motor? Here's How Much Mine Cost.
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy