The Wacker Neuson Piston Ring Set (0.50) is a genuine OEM oversize piston ring set designed for BFS floor saws, GV portable generators, and BPU reversible vibratory plate compactors across multiple configurations. As a direct Wacker Neuson OEM component, part is manufactured to the exact tolerances required for proper ring seal and combustion efficiency in these Honda-powered and Robin/Subaru-powered engines. This set covers a broad range of machines including the BFS 914AB, BFS 935AB, BFS 940 and BFS 940A floor saws, the GV5000A and GV5003A portable generators, and the BPU 3050A, BPU 3050, BPU 3750Ats, and BPU 4045A reversible plate compactors. Sourcing the correct oversize ring set ensures a proper bore-to-ring fit following cylinder reconditioning and restores full engine compression to get your equipment running at peak output.
Key Features
- Correct Oversize Specification: — The 0.50 mm oversize designation matches reconditioned bore dimensions precisely, ensuring proper ring-to-wall contact and a complete combustion seal after cylinder honing or boring.
- Genuine OEM Engineering: — Manufactured by Wacker Neuson to original material and ring-gap specifications, so compression, oil control, and heat transfer performance match the engine's original design intent.
- Broad Cross-Family Fitment: — A single part number covers BFS floor saw, GV generator, and BPU reversible plate compactor applications — confirm your model and machine number before ordering to ensure the correct fit for your rebuild.
- Restores Full Compression: — Worn or broken piston rings allow combustion gases to blow past the piston, causing hard starting, power loss, and excessive oil consumption. A fresh ring set restores proper sealing and brings engine output back to spec.
- Engine Rebuild Ready: — Supplied as a complete set with all rings required for a single-cylinder oversize rebuild, reducing parts sourcing time and keeping your engine overhaul on track.
Piston rings seal the gap between the piston and the cylinder wall, performing three critical jobs: containing combustion pressure above the piston to generate power, scraping excess oil off the cylinder wall to prevent burning, and transferring heat from the piston into the cylinder bore. When rings wear, lose tension, or break, combustion gases escape past the piston — a condition known as blow-by — which robs the engine of power, increases fuel and oil consumption, and produces excessive exhaust smoke. The 0.50 oversize designation on the Wacker Neuson 5100001285 indicates these rings are intended for use after the cylinder has been bored or honed to the corresponding oversize diameter as part of an engine rebuild, restoring the correct clearances and sealing performance that the engine depends on.
Part Details
| Part Number | 5100001285 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (0.50) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BFS940 | BFS940 | 5100029229, 5100054574 |
| GV5000A | GV5000A | 5000009346, 5000009351, 5000009361, 5100006204 |
| 50Hz Portable Value Generator | GV5003A | 5000009347, 5000009362, 5100002154 |
| BPU 3050A | BPU 3050A | 5000008763 |
| BPU 3050A US | BPU 3050A US | 5000610361 |
| BFS 935A SAW,BASIC | BFS 935AB | 5000008910 |
| BPU 3750Ats | BPU 3750Ats | 5000610408 |
| BPU3750Ats | BPU 3750Ats US | 5000610423 |
| Gasoline Reversible Vibratory Plate | BPU 3050 | 5000008955 |
| BFS 914AB SAW | BFS 914AB | 5000610092 |
| BPU 4045A US | BPU 4045A US | 5100009663, 5000610403 |
| Petrol Floor Saw BFS 940A | BFS 940A | 5000610327, 5100004004 |
| Vibratory plate BPU 4045A | BPU 4045A | 5000610345 |
| Floor Saw | BFS 914A | 5100004002 |
| Floor saw BFS940 | BFS 940 | 5100009934 |
| Vibration Plate | BPU3050A CN | 5100039661 |
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.
