The Honda 13012-YA0-004 Piston Ring Set (0.50) is a genuine OEM oversize piston ring set designed for G200 horizontal shaft engines, GV200 vertical shaft engines, and a wide range of Honda power equipment including generators, tillers, water pumps, lawn mowers, and snow blowers. As an authentic Honda OEM component, this ring set is manufactured to the exact bore dimensions and tension specifications required for a proper oversize rebuild. The (0.50) designation identifies this as the 0.50 mm oversize variant — confirm your cylinder bore has been machined to the matching oversize before ordering.
Key Features
- OEM Bore Sealing and Oil Control — genuine Honda construction ensures the correct ring tension, end gap, and groove clearance for combustion sealing and oil film management in an oversize-bored cylinder
- Oversize Variant — Verify Your Bore — the (0.50) designation means this set is intended for cylinders bored 0.50 mm over standard; match this spec to your machined bore before installation
- Broad Equipment Compatibility — fits G200 horizontal shaft engines, GV200 vertical shaft engines, and Honda power equipment including E1500, ED1000, EG1500, EG2200, EM1600, EM1800, EM2200 generators, F500, FR500, FR700 tillers, WA20, WA30, WB20, WB30, WT20, WT30 water pumps, the HR21 lawn mower, and the HS50 two-stage snow blower
- Check Your Serial Number — Honda supersedes parts at production breaks; verify your unit's serial number against the fitment table to confirm part number 13012-YA0-004 is correct for your serial range
- Restored Compression and Power — worn or broken piston rings allow combustion gases to bypass the piston, causing lost compression, increased oil consumption, and hard starting; a correctly fitted oversize ring set restores cylinder sealing and brings performance back to spec
Piston rings seal the gap between the piston and the cylinder wall, serving two critical roles: they contain combustion pressure above the piston to drive the power stroke, and they scrape excess oil off the cylinder wall to prevent it from burning in the combustion chamber. In a worn engine, ring wear or breakage is a leading cause of low compression, blue exhaust smoke, and excessive oil use. When a cylinder has been bored oversize to remove scoring or wear, a matching oversize ring set — such as this (0.50) set — must be installed so the rings contact the full bore surface and restore proper sealing. Installing the wrong oversize will leave excessive end gap and gap leakage, or prevent the rings from seating at all.
Part Details
| Part Number | 13012-YA0-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (0.50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | E1500, EG1500 | 1152171-9999999 |
| Generator | ED1000, EG2200, EM1600, EM1800, EM2200 | All |
| Horizontal Shaft Engine | G200 | 1152171-9999999 |
| Lawn Mower | HR21 | All |
| Tiller | F500 | 1152171-9999999 |
| Tiller | FR500, FR700 | All |
| Two-Stage Snow Blower | HS50 | All |
| Vertical Shaft Engine | GV200 | All |
| Water Pump | WA20, WA30 | 1152171-9999999 |
| Water Pump | WB20, WB30, WT20, WT30 | 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.
