Piston Ring Kit STD Bore Fits Yamaha YFM 350 And YFM 400 ATV Models 1987 2011 FW FB
Piston Ring Kit STD Bore Fits Yamaha YFM 350 And YFM 400 ATV Models 1987 2011 FW FB is backordered and will ship as soon as it is back in stock.
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Piston Ring Kit STD Bore Fits Yamaha YFM 350 And YFM 400 ATV Models...
This piston ring kit is engineered for Yamaha YFM350 and YFM400 ATV engines spanning 1987 through 2011, delivering a precise STD bore restoration that revives compression and oil containment. Designed to fit a broad lineup—including Big Bear, Grizzly, and Warrior variants—this kit returns the engine to factory-like sealing and power without the higher cost of OEM parts. When installed with proper break-in and routine maintenance, it helps reduce oil consumption and sustain reliable performance on trails or in field work.
Built to withstand rugged daily use, this aftermarket STD bore set targets common wear patterns: worn or glazing rings, diminishing compression, and oil blow-by. It provides a dependable, cost-effective alternative to factory parts while preserving OEM-style fit and function for long-lasting reliability in harsh trail conditions and demanding farm tasks.
Comprehensive Vehicle Fitment
| Manufacturer | Models / Series | Years / Details |
|---|---|---|
| Yamaha | YFM350ER | 1987–2000 |
| Yamaha | YFM350U | 1987–2000 |
| Yamaha | YFM350F | 1987–1999 |
| Yamaha | YFM350FW | 1987–1999 |
| Yamaha | YFM350FX | 1987–2009 |
| Yamaha | YFM350X | 1987–2009 |
| Yamaha | YFM350G | 2007–2010 |
| Yamaha | YFM350R | 2004–2009 |
| Yamaha | YFM400F | 1993–2006 |
| Yamaha | YFM400FW | 1993–2006 |
| Yamaha | YFM400FB | 2007–2011 |
Product Specifications
| Attribute | Details |
|---|---|
| OEM Reference Part Numbers | 4GB-11610-00-00 (OEM); Superseded OEMs include 42Y-11610-000, 42Y-11610-010, 4X71-1610-000, 4X71-1610-010, 4X71-1610-020 |
| Type | Piston Ring Kit, Standard Bore (STD) |
| Manufacturer | Aftermarket Replacement |
| Application | Yamaha YFM350 and YFM400 series ATVs, 1987–2011 (models listed in fitment) |
| Bore Size | Standard bore (0.00 oversize) |
| Number of Rings | Typically includes 3 rings per cylinder: Top compression ring, Second compression ring, Oil ring |
| Material / Finish | Standard piston-ring alloy; top ring chromed or plated per OEM spec |
| Ring Arrangement Notes | 3-ring set designed to replicate OEM geometry and sealing characteristics; rings are sized to Yamaha factory tolerances when used with the corresponding STD bore cylinder |
OEM & Aftermarket Cross-Reference Information
| Part Number | Brand / Type | Cross-Reference Notes |
|---|---|---|
| 4GB-11610-00-00 | Aftermarket Replacement | OEM Yamaha piston ring set; cross-references to superseded OEMs: 42Y116100000, 42Y116100100, 4X7116100000, 4X7116100100, 4X7116100200 |
What's Included
This box contains the standard Yamaha YFM350/400 piston ring set (STD bore) ready for installation on the cylinder. In general, you can expect:
- Top compression ring
- Second compression ring
- Oil ring
Not included: piston, gaskets, circlips, or other ancillary components.
Why Choose This Aftermarket Replacement?
- Direct-Fit Compatibility: Precisely matched to Yamaha YFM350/400 engines listed in the fitment table to restore OEM-like sealing and performance.
- OEM Cross-Reference: Clear cross-references to superseded Yamaha OEM part numbers to ease parts sourcing and compatibility checks.
- Premium Materials: Standard alloy piston rings with chrome/plated surfaces where required to mirror factory performance and longevity.
- Exact Bore Match: STD bore specification designed to restore proper compression without requiring oversized machining.
- Cost-Effective Reliability: A durable option that delivers OEM-style function at a fraction of OEM pricing.
- Sealing & Break-In Confidence: Engineered to seal effectively after a proper break-in, helping minimize oil consumption and power loss.
Installation Notes:
- Clean the cylinder bore and ring lands thoroughly before installation to prevent micro-particle scoring.
- Inspect the ring gaps and stagger the end gaps per Yamaha/service manual guidance to minimize blow-by.
- Lubricate rings and pistons with clean engine oil prior to installation to reduce initial wear during startup.
- Install the rings in the correct order and orientation; use a proper piston ring expander to avoid bending or nicking rings.
- Verify proper ring seating by performing a careful, gradual break-in procedure with varied throttle and loads as recommended for Yamaha engines.
- Keep the work area free of debris and avoid introducing oil, dirt, or metal shavings into the crankcase during assembly.
Why Upgrade?
Worn piston rings allow blow-by, reduced compression, and elevated oil consumption, which sap throttle response and overall reliability. Replacing with an STD bore piston ring kit restores proper sealing and compression, delivering dependable power for trail riding or farm work and helping your ATV stay dependable when it matters most.
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