{"product_id":"athena-r4856-199-top-end-race-gasket-kit-yamaha-yz85-moto-house-mx","title":"Athena Top End Race Gasket Kit R4856-199 — Yamaha YZ85 2019-2025","description":"\u003ch1\u003e\u003cstrong\u003eAthena Top End Race Gasket Kit R4856-199 — Yamaha YZ85 2019-2025\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAthena Top End Race Gasket Kit\u003c\/strong\u003e (R4856-199) is the essential choice for pro, semi-pro, and amateur riders who need to keep their engine performing at its peak. Designed specifically for racers who need to freshen up their top end between motos or during mid-season maintenance, this kit ensures your \u003cstrong\u003eYZ85\u003c\/strong\u003e maintains factory-level sealing and reliability.\u003c\/p\u003e\n\u003cp\u003eEngineered for versatility, this kit includes a high-performance \u003cstrong\u003eMulti-Layer Stainless Steel (MLSS) head gasket\u003c\/strong\u003e and multiple premium-quality base gaskets of varying thicknesses. This setup allows you to precisely optimize your engine's compression ratio, giving you the flexibility to tune your bike for standard pump gas or high-octane race fuel depending on your performance goals.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Athena Top End Race Gasket Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRace-Ready Performance:\u003c\/strong\u003e Specifically designed for frequent engine freshening and performance optimization.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMLSS Technology:\u003c\/strong\u003e Features a top-of-the-line Multi-Layer Stainless Steel head gasket for superior heat and pressure resistance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Tuning:\u003c\/strong\u003e Includes multiple base gaskets of varying thicknesses to fine-tune squish and compression ratios.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Grade:\u003c\/strong\u003e Built to meet the demands of competitive motocross racing and high-intensity trail riding.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f7f7f7;\"\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2019-2025\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYZ85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include piston rings or needle bearings?\u003c\/strong\u003e\u003cbr\u003e\nA: No, this is a dedicated top-end gasket kit designed for sealing components. It does not include hard parts like piston rings, wrist pin bearings, or valve stem seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do the different base gaskets help my performance?\u003c\/strong\u003e\u003cbr\u003e\nA: By using different thicknesses of base gaskets, you can adjust the cylinder height to change your engine's squish clearance and compression ratio, allowing you to tailor the power delivery for either pump gas or race fuel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When using the different base gaskets to tune your compression, always use a piece of solder wire to check your squish clearance after assembly. It is the only accurate way to ensure you have sufficient clearance to avoid piston-to-head contact while maximizing combustion efficiency.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-yz85-performance-parts-and-accessories-moto-house-mx\"\u003eYamaha YZ85 Performance Parts\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eYamaha 2-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003eHigh-Temp Assembly Lube\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Athena Top End Race Gasket Kit R4856-199\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Athena\"\n  },\n  \"mpn\": \"R4856-199\",\n  \"description\": \"High-performance Athena Top End Race Gasket Kit for Yamaha YZ85. Includes MLSS head gasket and various base gaskets for compression tuning.\",\n  \"category\": \"Gasket Kit\"\n}\n\u003c\/script\u003e","brand":"Athena","offers":[{"title":"Default Title","offer_id":31477318058067,"sku":"R4856-199","price":23.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/athena-race-gasket-kit-top-end-r4856-199-yamaha-yz85-2019-2024-877302.jpg?v=1735340672","url":"https:\/\/motohousemx.com\/products\/athena-r4856-199-top-end-race-gasket-kit-yamaha-yz85-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}