The Honda 13012-Z5L-004 Piston Ring Set (0.50) is a genuine OEM component designed for GX340 horizontal shaft engines. This is an oversize ring set — the (0.50) designation indicates a 0.50 mm overbore specification, meaning it is intended for engines whose cylinder bore has been machined 0.50 mm over the standard dimension. Before ordering, confirm your engine's bore size matches this oversize to ensure the rings seat and seal correctly. As a genuine Honda part, this ring set is manufactured to the same specifications as the original, ensuring proper fit in the cylinder bore without secondary fitting or modification.
Key Features
- Genuine OEM Construction — manufactured by Honda to the exact dimensions required for proper bore sealing and oil control in GX340 engines, with no guesswork on ring width, gap, or profile
- 0.50 mm Oversize Specification — the (0.50) designation is critical: this set is for bores that have been machined 0.50 mm over standard; verify your bore size before ordering to confirm this is the correct oversize for your rebuild
- Compression and Oil Control — a correctly fitted ring set maintains cylinder compression, prevents blow-by, and controls oil consumption; worn or broken rings cause hard starting, power loss, and excessive oil burning
- Fits GX340 Horizontal Shaft Engines — check your engine's serial number against the fitment table to confirm part number 13012-Z5L-004 applies to your specific production run, as Honda supersedes ring sets at serial breaks
Piston rings seal the gap between the piston and the cylinder wall, performing two essential jobs: holding combustion pressure above the piston so the engine produces full power, and scraping excess oil back down the bore so it does not burn in the combustion chamber. A GX340 engine running worn or broken rings will typically show reduced compression, increased oil consumption, blue exhaust smoke, and difficulty starting under load. Replacing the ring set during a bore overhaul restores the tight seal the engine depends on for efficient combustion and clean running.
Part Details
| Part Number | 13012-Z5L-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (0.50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX340 | 1154253-9999999 |
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.
