The Honda 13103-ZN1-000 Piston (0.50) is a genuine OEM oversize piston designed for GX670 horizontal shaft engines and GXV670 vertical shaft engines. As an OEM component, this piston is manufactured to Honda's exact dimensions, ensuring the correct crown profile, ring groove geometry, and wrist pin bore for the 670 cc twin-cylinder platform. This part carries the (0.50) oversize designation, meaning it is intended for engines whose cylinder bore has been machined 0.50 mm over standard — confirm your bore size before ordering to ensure this is the correct oversize for your rebuild.
Key Features
- Genuine OEM Piston Construction — manufactured by Honda to the exact crown shape, compression height, and ring groove dimensions required by the GX670 and GXV670 twin-cylinder engines, ensuring proper combustion chamber volume and ring seal.
- 0.50 mm Oversize Designation — this piston is sized for bores that have been rebored 0.50 mm over standard; it is listed for both GX670 and GXV670 engines, so match the (0.50) spec to your actual machined bore before installation.
- Broad Twin-Cylinder Fitment — covers GX670 horizontal shaft and GXV670 vertical shaft engines; verify your engine's serial number against the fitment table to confirm the correct application for your unit.
- Combustion Integrity — a correctly sized piston maintains the compression seal and oil control critical to full power output; an undersized or worn piston leads to blow-by, oil consumption, and lost compression.
The piston is the reciprocating component inside the cylinder bore that transfers combustion energy to the crankshaft via the connecting rod. It seats the piston rings, which seal combustion gases above and scrape oil below, keeping compression high and oil consumption low. When a piston wears beyond its serviceable limit — or when a cylinder has been bored oversize to clean up scoring — an oversize replacement piston like this one restores the correct running clearance, ring seal, and power output the engine depends on.
Part Details
| Part Number | 13103-ZN1-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Piston (0.50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX670 | 1000001-1037871 |
| Vertical Shaft Engine | GXV670 | 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.
