{"product_id":"piston-ring-kit-yamaha-yfm-350-yfm-400-f-fw-fb-os-0-50-1987-2011","title":"Piston Ring Kit OS 0.50 For Yamaha YFM 350 400 F FW FB 1987 2011 83.50mm Bore Family","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eWhen your Yamaha YFM 350 or 400 engine starts showing signs of age, like sluggish acceleration or oil leaks, upgrading to a precision-engineered piston ring kit in the OS 0.50 size can make all the difference for models from 1987 to 2014. This aftermarket piston ring kit is specifically designed for the 83.50mm bore family, ensuring a perfect seal in the combustion chamber to restore lost compression and enhance overall engine efficiency. By swapping out worn rings, you'll experience smoother operation and reliable power delivery, whether you're tackling rugged trails or handling daily farm chores, helping your quad run like new again. Its carefully machined design provides superior sealing and oil control, making it a smart, cost-effective choice compared to a full engine rebuild. You'll appreciate the reliability this aftermarket replacement offers, built to withstand the demands of off-road adventures or heavy-duty work without the premium price tag of original equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eComprehensive Vehicle Fitment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eManufacturer\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eModels \/ Series\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eYears \/ Details\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350ER Moto-4 350\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1987–1995\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350F Moto-4 350\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1987–1999\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350U Big Bear 350 2x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1996–1999\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350FW Big Bear 350 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1987–1999\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350FX Wolverine 350 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1995–2005\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350X Wolverine 350 2x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2006–2009\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350X Warrior 350\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1987–2004\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350R Raptor 350\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2004–2013\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350A Bruin 350 2x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2004–2006\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350FA Bruin 350 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2004–2006\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350G Grizzly 350 2x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2007–2011\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM350FG Grizzly 350 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2007–2014\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM400F Kodiak 400 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1993–2006\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM400FW Kodiak 400 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1993–1998\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM400F Kodiak 400 4x4\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2000–2006\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM400 Big Bear 400\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2000–2011\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYFM400FB Big Bear 400 IRS\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2007–2011\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e \u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eAttribute\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetails\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOEM Reference Part Number\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e4GB-11610-20-00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAdditional OEM References\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4GB-11610-00 (STD), 4GB-11610-40 (1.00mm OS)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAftermarket Cross-References\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4676M08350 (Wiseco), XYRVICT 4GB-11610-20-00\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eType\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePiston Ring Kit (0.50mm Oversize)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eManufacturer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAftermarket Replacement\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBore Diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e83.50mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRing Specifications\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTop Ring: Nitride 1.2mm; Second Ring: Ductile iron 1.2mm; Oil Ring: Chrome plating 2.75mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCondition\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100% New Aftermarket\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha YFM350 (1987–2014) and YFM400 (1993–2011) models with 83.50mm bore after oversize machining\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e \u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eOEM \u0026amp; Aftermarket Cross-Reference Information\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003ePart Number\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eBrand \/ Type\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eCross-Reference Notes\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e4GB-11610-20-00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha OEM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003ePiston Ring Set (0.50mm O\/S) – Primary OEM reference; confirmed for YFM350FA Bruin 350 4WD (2004) \u003c\/span\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2004\/yfm350fa-bruin-350-4wd\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e and YFM400F Big Bear 400 Semi-Auto (2009) \u003c\/span\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2009\/yfm400f-big-bear-400-semi-auto\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e4GB-11610-00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha OEM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003ePiston Ring Set (STD) – Standard bore reference \u003c\/span\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2004\/yfm350fa-bruin-350-4wd\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2009\/yfm400f-big-bear-400-semi-auto\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e4GB-11610-40\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha OEM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003ePiston Ring Set (1.00mm O\/S) – 1.00mm oversize reference \u003c\/span\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2004\/yfm350fa-bruin-350-4wd\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2009\/yfm400f-big-bear-400-semi-auto\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003e4676M08350\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWiseco\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003eForged Piston Kit – Includes piston rings, wrist pin, and circlips. Features 83.50mm bore (0.50mm oversize), 8.6:1 compression ratio, forged 2618 aluminum construction. Made in USA. Fits Yamaha YFM400 Big Bear 2x4 and YFM400F Kodiak 4x4 (2007-2012) \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eXYRVICT 4GB-11610-20-00\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eXYRVICT\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan\u003ePiston and Piston Rings Kit – 83mm bore, includes piston with pin and rings. Replaces OEM 4GB-11610-20-00. Fits extensive Yamaha YFM350 models including Big Bear, Bruin, Grizzly, Moto-4, Raptor, Warrior, and Wolverine (1987-2014) \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e \u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eWhat's Included\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eBased on standard piston ring kits for the YFM350\/400 engine, this kit includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eTop ring – 1.2mm Nitride\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eSecond ring – 1.2mm ductile iron\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eOil ring set – 2.75mm chrome plating\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e*\u003cspan\u003eNote: This is a piston ring kit only. For a complete top-end rebuild, pistons are available separately from manufacturers like Wiseco (4676M08350) \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e and XYRVICT \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e*\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eWhy Choose This Aftermarket Piston Ring Kit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eExtensive Vehicle Coverage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compatible with Yamaha YFM350 models (1987-2014) including Big Bear, Bruin, Grizzly, Moto-4, Raptor, Warrior, and Wolverine, plus YFM400 models (1993-2011) including Big Bear and Kodiak, with fitment confirmed by multiple aftermarket suppliers \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eOEM Cross-Reference:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Cross-references genuine Yamaha part number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4GB-11610-20-00\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for confident replacement, as verified in Yamaha OEM parts diagrams \u003c\/span\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2004\/yfm350fa-bruin-350-4wd\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/shop.yamahacity.com.au\/partFinder\/fiche\/yamaha\/2009\/yfm400f-big-bear-400-semi-auto\/crankshaft-piston#content\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eProven Aftermarket Support:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Leading aftermarket brands including Wiseco \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e and XYRVICT \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e manufacture compatible piston and ring kits for these models, validating extensive aftermarket support for the Yamaha 350\/400 platform.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003ePremium Materials:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eWiseco\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e pistons are forged from high-strength 2618 aluminum alloy in the USA, providing improved tensile strength, optimized strength-to-weight ratio, and superior service life \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eXYRVICT\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e rings feature nitride top rings, ductile iron second rings, and chrome-plated oil rings for enhanced durability and oil control \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eOversize Option:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The 0.50mm oversize rings allow you to reclaim engineered clearances in worn cylinders, restoring compression and combustion efficiency without replacing the entire cylinder.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eEnhanced Engine Efficiency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Proper ring sealing maintains optimal cylinder pressure, resulting in improved power and performance \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eLong-Lasting Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Engineered for durability, these rings are built to withstand the demands of everyday riding and heavy-duty work \u003c\/span\u003e\u003ca href=\"https:\/\/www.amazon.ca\/dp\/B0DF5B51N9\/ref=olp-opf-redir?aod=1\u0026amp;linkCode=osi\u0026amp;psc=1\u0026amp;keywords=eb1236+yamaha+grizzly+eps+std\u0026amp;th=1\u0026amp;dib_tag=se\u0026amp;dib=eyJ2IjoiMSJ9.vC4j2APxxW6FaWZKJIwcZnK31VCSxDm2II38xRMkfx4K8uJ0cx8NdM3KgW_8nfai7eiJDSL0vvfqdifhu7aUzFQ4VrRzmS-lU845YzQpZP8.njLe1g8ZlVOSfyZCmwEOqTMXpeI82akTOO8jdvYPZjM\u0026amp;qid=1729770941\u0026amp;sr=8-2-fkmr2\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eInstallation Notes:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eEnsure the cylinder is properly machined to the correct oversize specification (83.50mm) before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eProfessional machining and assembly are recommended to ensure proper clearances and ring gap.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eFollow manufacturer torque specifications and tightening sequences as outlined in the Yamaha service manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eNote that Wiseco piston kits include rings, wrist pin, and circlips – this ring kit is compatible with Wiseco pistons \u003c\/span\u003e\u003ca href=\"https:\/\/www.wiseco.com\/shop\/powersports\/pistons-powersports\/piston-kits\/yamaha-yfm400f-kodiak-4x4-yfm400-big-bear-2x4-wiseco-piston-kit-2\/\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eAfter installation, properly break in the engine according to manufacturer recommendations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eVerify your exact model and year against the fitment table to ensure compatibility with your engine configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eWhy Upgrade?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWorn piston rings can cause compression loss, excessive oil consumption, and reduced power output—leading to poor performance and potential engine damage. Restore your Yamaha YFM350 or YFM400 engine's power and reliability with this quality aftermarket oversize piston ring kit, designed to keep you riding with confidence.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eOrder your piston ring kit today and get back on the trail with confidence.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"ATV City","offers":[{"title":"Default Title","offer_id":57319264584054,"sku":"192.04813","price":23.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0302\/0406\/files\/pistonring_c1ab62b5-5662-4bc2-925d-ef225ae50e56.png?v=1774886127","url":"https:\/\/dgtagri.co.uk\/products\/piston-ring-kit-yamaha-yfm-350-yfm-400-f-fw-fb-os-0-50-1987-2011","provider":"DGT Agri","version":"1.0","type":"link"}