ATHENA
Athena Valve Stem Seal Pair 4.5 mm
- Manufacturer part #
- M739000ML0720
- Supplier reference
- 3395
- APJ SKU
- APJ000013
In stock · Ready to ship
Prepared within 1 business day · Tracking included.
Shipping & 30-day returns
Standard: $8, or free on orders of $70 or more. Estimated transit: 3–5 business days after shipment.
Express: $15. Estimated transit: 1–2 business days after shipment. Preparation time is additional; available options appear at checkout.
Returns: Request within 30 days of delivery. Items must be unused and in their original packaging. Contact APJ before returning anything. Return shipping is the customer's responsibility unless APJ confirms an incorrect or defective item.
Product details & included items.
2 valve stem seals · 4.5 × 10 × 8 mm · ATHENA M739000ML0720
Replacement valve stem seal pair for cylinder-head service. These seals control oil at the valve stem and guide interface. Supplied as two seals; check the required valve position and total quantity for your engine before ordering.
- 2 valve stem seals (1 pair).
The numbered guide identifies the supplied seal type. One pair may cover only part of the engine’s valve set; it is not a complete cylinder-head gasket or valve-service kit.
Technical specifications
| Quantity supplied | 2 valve stem seals (1 pair) |
|---|---|
| Motorcycle | Selected Honda models — see application table |
| Model years | See model-specific U.S. coverage |
| Package format | Valve stem seal pair |
| Product type | Valve Stem Seals |
| Component dimensions | 4.5 × 10 × 8 mm (APJ-confirmed) |
| Assembly | Cylinder head / valve guides |
| Honda OEM reference in ATHENA listing | 12209-ML0-720 |
| Related Honda OEM reference for comparison | 12209-ML0-722 |
| Valve position | Verify intake / exhaust position in the exact engine’s OEM diagram |
Packaged product — weight & dimensions
| Packaged product weight | 0.15 oz (4.3 g) |
|---|---|
| Packaged dimensions (L × W × H) | 5 × 2.5 × 0.5 in (12.70 × 6.35 × 1.27 cm) |
Measurements refer to the packaged product, not the individual component dimensions.
Installation & preparation
Use the motorcycle service manual to identify the correct intake or exhaust seal and installation method. Inspect the valve stems and guides for wear; replacing seals does not correct excessive guide clearance. Protect the sealing lip from keeper grooves, lubricate as specified and seat the seal squarely with the correct driver. Inspect the spring after fitting and verify valve-train assembly before starting the engine.
OEM reference note: references identify original components for comparison, not a manufacturer-certified interchange of every application. Different intake and exhaust seals may be specified in the same engine. A related OEM reference must not be treated as permission to substitute all valve positions.
Material & construction
Molded green sealing body with the metallic spring visible in the product photograph. The product-specific elastomer compound and operating temperature have not been confirmed from manufacturer documentation. Color alone does not identify FKM, NBR, silicone or a heat rating. TEADIT gasket-sheet specifications do not apply to these valve stem seals.