{"product_id":"bolt-yz-ex-250cc-exhaust-hardware-kit-2001-2026-yamaha-yz250-yz250x","title":"BOLT YZ.EX.250CC Exhaust Hardware Kit 2001-2026 Yamaha YZ250 YZ250X","description":"\u003cdiv\u003e\n\u003cp\u003eA leaking two-stroke exhaust doesn't just make a mess of your engine—it actively robs you of critical backpressure and throttle response. The BOLT YZ.EX.250CC Exhaust Hardware Kit is the ultimate \u003cstrong\u003eOEM Replacement\u003c\/strong\u003e for Yamaha 250 riders who demand a factory-level seal. At Moto-House MX, we know that maintaining a tight seal at the cylinder manifold is the only way to keep your YZ running at peak efficiency and prevent the dreaded \"spooge\" from coating your frame and swingarm.\u003c\/p\u003e\n\n\u003cp\u003eEngineered for \u003cstrong\u003eRacing Performance\u003c\/strong\u003e, this kit features model-specific green Viton® rubber O-rings that are far superior to standard seals. Viton® is specifically chosen for its ability to withstand the extreme temperatures of a high-performance 250cc engine without hardening or cracking. Paired with high-tension exhaust springs and a fresh pipe-to-silencer coupler, this hardware ensures your expansion chamber stays secure and sealed through the roughest sections of the track or technical trails.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: BOLT YZ.EX.250CC Exhaust Kit\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eViton® High-Temp O-Rings:\u003c\/strong\u003e Includes model-specific green Viton® rubber seals designed to resist extreme heat and chemical degradation.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eComplete System Refresh:\u003c\/strong\u003e Provides high-tension pipe springs and a durable pipe-to-silencer coupler for a total exhaust overhaul.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003ePrecision Yamaha Fitment:\u003c\/strong\u003e Engineered specifically for the legendary Yamaha YZ250 and YZ250X two-stroke platforms.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Durability:\u003c\/strong\u003e Built to withstand the constant vibration and thermal cycling of competitive off-road riding.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eOptimized Seal:\u003c\/strong\u003e Restores engine backpressure and prevents exhaust leaks at the manifold and silencer junctions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\n\u003ctable\u003e\n\t\u003cthead\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eYear Range\u003c\/th\u003e\n\t\t\t\u003cth\u003eVehicle Brand\u003c\/th\u003e\n\t\t\t\u003cth\u003eVehicle Model \u0026amp; Size\u003c\/th\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/thead\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2001 - 2026\u003c\/td\u003e\n\t\t\t\u003ctd\u003eYamaha\u003c\/td\u003e\n\t\t\t\u003ctd\u003eYZ250\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2016 - 2025\u003c\/td\u003e\n\t\t\t\u003ctd\u003eYamaha\u003c\/td\u003e\n\t\t\t\u003ctd\u003eYZ250X\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why are the O-rings in this kit green?\u003c\/strong\u003e\u003cbr\u003e\nA: The green color indicates they are made from Viton® rubber. This material has a much higher heat rating than standard black nitrile O-rings, which is essential for the high exhaust gas temperatures of a 250cc two-stroke.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Should I replace my exhaust springs even if they aren't broken?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Over time, heat and vibration cause springs to lose their tension (stretch), which leads to vibration-induced wear on your exhaust manifold and can cause the pipe to \"rattle\" and leak.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include the rubber coupler for the silencer?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this kit includes the rubber pipe-to-silencer coupler, the Viton® O-rings for the cylinder manifold, and the necessary tension springs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eUpgrade Your Ride\u003c\/strong\u003e at Moto-House MX.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions –\u003c\/strong\u003e is located in Clermont\/Montverde, FL. The best motocross shop in Central Florida.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BOLT","offers":[{"title":"Default Title","offer_id":44267197169747,"sku":"YZ.EX.250CC","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/423421.png?v=1774128337","url":"https:\/\/motohousemx.com\/products\/bolt-yz-ex-250cc-exhaust-hardware-kit-2001-2026-yamaha-yz250-yz250x","provider":"Moto-House MX","version":"1.0","type":"link"}