{"product_id":"wossner-8303db-piston-kit-2018-2021-sherco-125-se-r-sc-standard-size-b","title":"Wossner 8303DB Piston Kit - 2018-2021 Sherco 125 SE-R SC Standard Size B","description":"\u003ch3\u003eWossner 8303DB Standard Series Forged 2-Stroke Piston Kit - Standard Size B\u003c\/h3\u003e\n\n\u003cp\u003eRefresh your French-built enduro machine with the precision of the Wossner 8303DB Piston Kit. Specifically designed for the Sherco 125 SE-R and SC models (2018-2021), this \"Size B\" forged kit is the expert choice for riders performing a mid-season refresh or scheduled top-end maintenance. At Moto-House MX, we understand that high-performance 125cc enduro engines demand perfect tolerances to maintain their torque and over-rev; this +0.01mm Size B kit provides the exact fitment required to compensate for minor cylinder wear and keep your Sherco running at its peak.\u003c\/p\u003e\n\n\u003cp\u003eForged from high-performance aerospace aluminum alloy, the 8303DB is engineered to withstand the unique stresses of technical off-road riding and extreme enduro. It features a dual-ring configuration, which offers superior cylinder sealing and enhanced heat transfer from the piston to the cylinder wall—critical for maintaining consistent power during slow-speed, high-load technical climbs. To ensure maximum service life, Wossner applies a permanent molybdenum disulphide skirt coating that reduces friction and prevents piston rock. Precision-machined for 54.01mm bores, this 53.94mm piston kit ensures your Sherco remains as agile and responsive as the day it left the factory.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8303DB Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size B (53.94mm):\u003c\/b\u003e Precision-machined for 54.01mm bores to restore ideal piston-to-wall clearances in cylinders with minor wear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eDual Ring Configuration:\u003c\/b\u003e Provides an exceptional secondary seal and improved cooling efficiency, ensuring a broader and more reliable powerband.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace-Grade Forged Alloy:\u003c\/b\u003e Significantly stronger and more heat-resilient than OEM cast pistons, offering superior structural integrity under extreme racing conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent skirt treatment minimizes internal drag and protects the cylinder walls for a quieter running engine and smoother break-in.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eOptimized Reciprocating Mass:\u003c\/b\u003e Expertly machined for lightness to ensure the Sherco 125 maintains its quick-revving, agile engine characteristics.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Assembly:\u003c\/b\u003e Includes the forged Size B piston, performance rings, wrist pin, and circlips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e Sherco 125cc engines are highly tuned for enduro performance. When your cylinder measures slightly beyond the original factory Size A spec, moving to a Wossner Size B (53.94mm) is the standard professional method to restore perfect mechanical tolerances. Always use a precision bore gauge to confirm your cylinder measures 54.01mm before installation. For a professional-grade rebuild, always install with a fresh top-end gasket kit and utilize premium 2-stroke oil to protect your forged assembly during the critical break-in period.\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\u003e2018-2021\u003c\/td\u003e\n            \u003ctd\u003eSherco\u003c\/td\u003e\n            \u003ctd\u003e125 SE-R Racing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2019\u003c\/td\u003e\n            \u003ctd\u003eSherco\u003c\/td\u003e\n            \u003ctd\u003e125 SC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2018\u003c\/td\u003e\n            \u003ctd\u003eSherco\u003c\/td\u003e\n            \u003ctd\u003e125 SE-R\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 a Size B piston?\u003c\/b\u003e\u003cbr\u003e\nA: Size B (53.94mm) is 0.01mm larger than Size A. It is typically used for your second or third top-end rebuild to account for the microscopic wear that occurs on the cylinder walls, ensuring you maintain the tight seal necessary for maximum horsepower.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Is this kit compatible with both the SE-R and SC models?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this kit is specifically designed to fit the Sherco 125 SE-R and the 125 SC cross-country models within the 2018-2021 range.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this forged piston require a different break-in than stock?\u003c\/b\u003e\u003cbr\u003e\nA: Forged pistons expand more than cast ones. It is recommended to perform 2-3 full heat cycles (allowing the engine to cool completely between each) before riding at a full race pace to ensure the rings and piston seat properly.\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 ensuring a leak-free rebuild and maintaining the correct squish gap for peak performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotul 800 2T Factory Line:\u003c\/b\u003e High-performance lubricant to ensure your new forged piston stays protected in technical enduro conditions.\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 8303DB Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8303DB Forged 2-Stroke Dual Ring Piston Kit for 2018-2021 Sherco 125 SE-R, SE-R Racing, and SC. 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