Description
Overview:
The BSA Connecting Rod Big Ends U/S030 are genuine bearing shells supplied as a pair to service one connecting rod on the BSA 320cc industrial engine. These precision-made shells support the big end of the con-rod on the crankshaft journal, restoring correct running clearance and smooth operation. Manufactured from durable, bearing-grade materials for long service life, they are suitable for heavy-duty industrial use. The U/S 0.030 in specification indicates an undersize of 0.030 inches (0.76 mm), intended for crankshafts that have been reground by this amount. Supplied as Unused Old Stock (NOS), they are authentic BSA parts and may show light tarnishing from age that does not affect performance. OEM No. 86 123 U/S 030. Ideal for BSA 320cc engines used in plant and machinery.
Key Features:
- Genuine BSA part for accurate fit and reliable performance on BSA 320cc industrial engines
- U/S 0.030 in (0.76 mm) size for use with crankshafts reground by 0.030 in (0.76 mm)
- Supplied as a matched pair of shells for one connecting rod big end
- Unused Old Stock (vintage/original) for period-correct restorations and repairs
- Durable bearing-grade construction for sustained load handling and consistent oil film control
- Precision-ground surfaces to help maintain correct oil clearance and reduce wear
- Straightforward replacement using standard workshop practices and tools
- Helps restore oil pressure and reduce knock from worn big end bearings
- Suitable for preventative maintenance or full engine rebuilds
Typical Applications:
Used during engine overhauls, crankshaft regrinds, and routine maintenance on BSA 320cc industrial engines. Common in workshop rebuilds to cure big end knock, improve oil pressure stability, and extend service life of engines operating in plant, machinery, and stationary equipment.
Also known as:
Big end bearing shells, con-rod bearings, connecting rod shells, rod end bearings, big end inserts, BE shells, crank journal shells.
Fits Models:
BSA 320cc
Alternate Part Numbers:
86 123 U/S 030, 86123US030
Product Specifications
| L&S Part No. | 86 123 U/S 030 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | BSA |
| OEM No. | 86 123 U/S 030 |
| Unit of Sale | 1 |
| Applications | BSA 320cc |
| Machine Type | Engines |
| Fits Brands | Villiers |
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