The Honda 12110-Z6L-307 Cylinder Head (#1) is a genuine OEM component designed for GX630, GX660, and GX690 horizontal shaft engines, GXV630, GXV660, and GXV690 vertical shaft engines, and the EB10000 generator. As a direct Honda OEM part, this cylinder head is manufactured to the same specifications as the original, ensuring a correct fit across every compatible application. Buyers should verify their machine's serial number against the fitment table, as Honda supersedes parts at specific serial breaks, and confirming the match before ordering is the best way to ensure you receive the right component.
Key Features
- Genuine Honda OEM Construction — sourced directly from Honda, this cylinder head delivers the combustion chamber geometry, port sizing, and valve seat dimensions the engine was designed around — no guesswork on critical tolerances
- Broad Twin-Cylinder Fitment — covers GX630, GX660, and GX690 horizontal shaft engines; GXV630, GXV660, and GXV690 vertical shaft engines; and the EB10000 generator, making it the correct #1 cylinder head across Honda's large-displacement V-twin lineup
- Check Your Serial Number — Honda revises parts at production serial breaks; confirm your engine or generator serial number against the fitment table before ordering to ensure part number 12110-Z6L-307 is the right supersession for your unit
- Combustion Integrity Restored — a warped, cracked, or eroded cylinder head allows compression loss, coolant contamination of the oil, and uneven combustion; replacing it with this OEM head restores the compression seal and combustion efficiency the engine depends on for full power output
The cylinder head is the uppermost structural component of a combustion chamber, sealing the top of the cylinder bore and housing the intake and exhaust valves, valve seats, and valve guides. It works together with the head gasket and the piston below to contain the combustion event and direct exhaust gases out through the exhaust port. When a cylinder head cracks, warps from overheating, or develops eroded valve seats, compression drops, power falls off noticeably, and the engine may consume oil or run rough — symptoms that point directly to head replacement as the remedy.
Part Details
| Part Number | 12110-Z6L-307 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Head (#1) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB10000 | All |
| Horizontal Shaft Engine | GX630, GX660, GX690 | All |
| Vertical Shaft Engine | GXV630, GXV660, GXV690 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
