Description
Overview:
This Valve Guide is a genuine Villiers part for the BSA 420CC industrial engine, supplied as unused old stock. It is a precision-machined guide made from tough, engine-grade metal to support accurate, low-friction movement of the valve stem. By keeping the valve aligned in the cylinder head, it helps maintain compression, reduce wear, and promote stable combustion. Designed as a direct replacement under OEM No. 86 743, it fits the BSA 420CC industrial engine used in plant and machinery applications. Ideal for routine maintenance or a full engine rebuild, it provides reliable performance while preserving factory clearances when installed correctly. As vintage stock, the surface may show tarnishing or storage marks, but this does not affect fitness for purpose or service life.
Key Features:
- Genuine Villiers part for assured fit and compatibility with BSA 420CC industrial engines
- OEM reference 86 743 for straightforward identification and replacement
- Durable, engine-grade metal construction for long service life in demanding conditions
- Precision internal bore supports correct valve stem guidance and smooth operation
- Helps maintain compression, valve timing stability, and overall engine efficiency
- Suitable for maintenance, repair, and restoration of older industrial engines
- Unused old stock: may display cosmetic ageing (e.g. tarnish) without affecting function
- Stable geometry designed to resist wear and minimise valve stem wobble
- Compatible with standard workshop installation methods used for cylinder head guides
- Supports reliable running and reduced valve train noise when clearances are within spec
Typical Applications:
Used during cylinder head servicing, valve train repairs, and engine rebuilds on BSA 420CC industrial engines. Common in workshop overhauls, plant maintenance, and restoration of legacy equipment where dependable valve guidance is required to restore performance and reduce oil consumption and valve stem wear.
Also known as:
Valve guide bush, cylinder head valve bush, valve guide sleeve, guide bush, valve stem guide, engine valve guide (BSA), Villiers guide bush, 86 743 valve guide.
Alternate Part Numbers:
86 743, 86-743, 86743
Product Specifications
| L&S Part No. | 86 743 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| Unit of Sale | 1 |
| Machine Type | Engines |
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