{"product_id":"wossner-8967db-piston-kit-2020-2026-honda-crf250r-crf250rx-crf250rwe-size-b","title":"Wossner 8967DB Piston Kit - 2020-2026 Honda CRF250R CRF250RX CRF250RWE Size B","description":"\u003ch3\u003eWossner 8967DB Premium Series Forged 4-Stroke Piston Kit - Standard Size B\u003c\/h3\u003e\n\n\u003cp\u003ePush the limits of your Unicam engine with the Wossner 8967DB Piston Kit. Engineered for the 2020-2026 Honda CRF250R and CRF250RX, as well as the elite CRF250RWE, this \"Size B\" forged kit is the professional choice for riders performing a top-end refresh on a cylinder with moderate hours. At Moto-House MX, we know that modern Honda 250s thrive on high-RPM efficiency; Wossner’s Premium Series forging delivers a high-strength, lightweight solution that sustains a powerful 13.9:1 compression ratio for maximum holeshot potential.\u003c\/p\u003e\n\n\u003cp\u003eThe 8967DB is a masterclass in 4-stroke engineering, featuring enhanced piston pin oiling slots and radial boss machining to ensure the wrist pin stays lubricated during extreme racing conditions. To maximize performance, Wossner includes a specialized ring land treatment for superior oil control and compression sealing. The skirt is treated with a permanent coating that minimizes friction and prevents piston rock, ensuring a quieter, smoother-running engine. Precision-machined for 79.01mm bores, this 78.97mm Size B piston provides the exact tolerances needed to restore your Honda’s powerband without sacrificing reliability.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8967DB Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size B (78.97mm):\u003c\/b\u003e Precision-machined for 79.01mm bores to compensate for minor cylinder wear and restore factory-spec clearances.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003e13.9:1 Compression Ratio:\u003c\/b\u003e Optimized for high-performance delivery, providing crisp throttle response and improved torque across the range.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePremium Series Forging:\u003c\/b\u003e Double-bridged design (where applicable) provides incredible structural integrity and heat resistance for high-RPM motocross use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAdvanced Lubrication System:\u003c\/b\u003e Enhanced oiling slots and annular grooves ensure consistent wrist pin lubrication under extreme thermal loads.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent skirt treatment reduces internal drag and protects the cylinder wall for a more efficient break-in.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Rebuild Kit:\u003c\/b\u003e Includes the high-performance forged Size B piston, rings, wrist pin, and pin locks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e The Honda CRF250R is a high-performance racing machine that requires perfect mechanical tolerances. When your cylinder measures slightly beyond the original Size A spec, moving to a Wossner Size B (78.97mm) is the expert way to maintain the tight piston-to-wall clearance necessary for peak horsepower. Always use a precision bore gauge to confirm your cylinder measures 79.01mm before installation. For a professional-grade rebuild, always install with a fresh top-end gasket kit and utilize premium synthetic oil to protect your forged assembly.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eYear Range\u003c\/th\u003e\n            \u003cth\u003eVehicle Brand\u003c\/th\u003e\n            \u003cth\u003eVehicle Model\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2020-2026\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF250R\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2020-2026\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF250RX\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2025-2026\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF250RWE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: Why should I choose Size B for my Honda?\u003c\/b\u003e\u003cbr\u003e\nA: Size B (78.97mm) is 0.01mm larger than Size A. It is the standard professional choice for a second or third top-end rebuild to account for microscopic cylinder wear, ensuring you maintain maximum compression and avoid piston slap.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Is this compatible with the Works Edition (RWE)?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this kit is fully compatible with the 2025-2026 Honda CRF250RWE, providing the durability and performance required for \"Works\" level racing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this piston require race gas?\u003c\/b\u003e\u003cbr\u003e\nA: With a 13.9:1 compression ratio, it is recommended to use high-quality 91+ octane pump gas or a race fuel blend to ensure consistent combustion and prevent detonation under heavy loads.\u003c\/p\u003e\n\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Top End Gasket Set:\u003c\/b\u003e Vital for maintaining a perfect seal and correct squish heights on your CRF.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePremium 4-Stroke Synthetic Oil:\u003c\/b\u003e Ensure your new forged piston and valvetrain stay protected in high-heat racing environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your machine’s power and precision today. Buy now at Moto-House MX!\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. The Best Motocross\/UTV \u0026amp; ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Wossner 8967DB Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8967DB Forged 4-Stroke Piston Kit for 2020-2026 Honda CRF250R, CRF250RX, and CRF250RWE. 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