{"title":"YZ250F\/YZ450F","description":"\u003cp\u003eShop Yamaha YZ250F\/YZ450F engine performance parts, big bore kits, pistons, ECU tuning, and race engine upgrades. Dyno-tested performance by BNR Motorsports.\u003c\/p\u003e","products":[{"product_id":"yz250f-overbore-kit","title":"BNR Yamaha YZ250F 280cc Big Bore Kit","description":"\u003ch1\u003eYZ250F 280cc Big Bore Kit  2019-2026 \u003c\/h1\u003e\n\u003cp\u003eTurn your \u003cstrong\u003e2019-2026 Yamaha YZ250F\u003c\/strong\u003e into a \u003cstrong\u003e280cc\u003c\/strong\u003e with the BNR Motorsports Big Bore Kit.\u003c\/p\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ebolt-in cylinder and piston package\u003c\/strong\u003e developed for racers and performance riders looking for increased displacement, power, and torque from their YZ250F.\u003c\/p\u003e\n\u003cp\u003eAt the heart of the kit is our \u003cstrong\u003ecustom BNR-spec JE forged piston\u003c\/strong\u003e, designed specifically for our 280cc combination. This is \u003cstrong\u003enot an off-the-shelf JE piston\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eKit Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e280cc big bore cylinder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom BNR-spec JE forged piston\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePiston rings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePiston clips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTop-end gaskets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYour choice of standard or DLC-coated wrist pin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCustom BNR \/ JE Piston Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3.189\" (81mm) bore\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2.110\" stock stroke\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e13.8:1 compression ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eJE 977M forging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom BNR piston design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned specifically for our YZ250F 280cc combination\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWrist Pin Options\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Wrist Pin\u003c\/strong\u003e\u003cbr\u003eOur standard wrist pin option for this kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDLC-Coated Wrist Pin\u003c\/strong\u003e\u003cbr\u003ePremium DLC-coated wrist pin featuring a low-friction, wear-resistant surface for demanding race applications.\u003c\/p\u003e\n\u003ch2\u003eBolt-In 280cc Conversion\u003c\/h2\u003e\n\u003cp\u003eThis kit is designed as a \u003cstrong\u003ebolt-in 280cc conversion\u003c\/strong\u003e for the 2019-2026 YZ250F.\u003c\/p\u003e\n\u003cp\u003eNo stroker crank is required. The increased displacement is achieved through the larger bore while retaining the stock 2.110\" stroke.\u003c\/p\u003e\n\u003ch2\u003eVortex ECU Required\u003c\/h2\u003e\n\u003cp\u003eA \u003cstrong\u003eVortex ECU is required\u003c\/strong\u003e to properly run this 280cc combination.\u003c\/p\u003e\n\u003cp\u003eSend your Vortex ECU to \u003cstrong\u003eBNR Motorsports\u003c\/strong\u003e, and we can flash it with our calibration specifically developed for the \u003cstrong\u003eYZ250F 280cc big bore setup\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVortex ECU Flashing: $199.99\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen sending your ECU to us, please download, complete, and include the BNR Motorsports ECU Form with your ECU:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.bnrmotorsports.com\/downloads\/BNRECUFormpdf.pdf\"\u003eDownload BNR Motorsports ECU Form\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e ECU flashing is \u003cstrong\u003enot included\u003c\/strong\u003e with the 280cc big bore kit and must be purchased separately.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eYamaha YZ250F\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2019\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2020\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2021\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2022\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2023\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2024\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2025\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2026\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFits 2019-2026 YZ250F models only.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a performance-oriented engine package. Proper fuel, ECU calibration, and engine setup are important when running this \u003cstrong\u003e13.8:1 compression 280cc combination\u003c\/strong\u003e.\u003c\/p\u003e","brand":"BNR Motorsports","offers":[{"title":"Standard Piston Pin","offer_id":49129365176510,"sku":null,"price":1129.99,"currency_code":"USD","in_stock":true},{"title":"DLC-Coated Piston Pin","offer_id":49129365209278,"sku":null,"price":1199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0025\/8890\/1446\/files\/BC723FE7-563B-446B-8FB1-B0641B6CFE1B.jpg?v=1790187002"},{"product_id":"vortex-x10-performance-ecu-yamaha-yz250f","title":"Vortex X10 Performance ECU – Yamaha YZ250F","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMore Power. Smoother Power. Race-Proven Performance.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVortex X10 Performance ECU\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is one of the best upgrades you can make to your Yamaha YZ250F. Designed for serious motocross and cross-country racing, this ECU delivers improved throttle response, smoother power delivery, and the adjustability needed to get the most out of your bike.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeaturing 10 pre-programmed fuel and ignition maps developed through extensive dyno and track testing, the Vortex ECU allows riders to quickly adjust engine performance without modifying the factory wiring.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e10 Performance Maps:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Pre-programmed fuel and ignition maps selectable using an adjustable dial\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePlug-and-Play Installation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Direct replacement for the factory ECU with no wiring modifications required\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdjustable Fuel Trims:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Three switches for low, mid, and high throttle openings, allowing fuel adjustments from +12.5% to -10%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eV-Boost Technology:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Programmable voltage boost circuit designed to maximize spark energy throughout the RPM range\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIncreased Rev Limit:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Higher RPM limit where applicable\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWaterproof Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Durable housing with O-ring-sealed adjustment switches\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDiagnostic Capability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Sensor fault detection with flash codes displayed through the factory FI light\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEasy Adjustments:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Screwdriver-operated switches provide visual feedback\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMounting Hardware:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Rubber mounting boot and brackets included\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRace-Proven Reliability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for demanding competition use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eFREE BNR Motorsports Custom ECU Tune\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePurchase your Vortex ECU from BNR Motorsports and receive our custom BNR ECU tune at no additional charge!\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur custom tuning is developed through extensive dyno testing and real-world racing experience to optimize performance for your specific YZ250F setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBNR Custom Tune Includes:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCustom fuel and ignition mapping for your engine configuration\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOptimized throttle response and power delivery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTuning tailored to your engine modifications, exhaust, intake, and fuel type\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRace-developed mapping for motocross and cross-country applications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eWhether you're running a stock engine or a fully built race motor, we can configure your ECU to match your setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTo receive your FREE BNR tune, email \u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"mailto:bnrmotorsports@hotmail.com\"\u003e\u003cstrong\u003e\u003cspan\u003ebnrmotorsports@hotmail.com\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003cstrong\u003e\u003cspan\u003e with your bike's year, engine modifications, exhaust, intake, fuel type, and other relevant setup information.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFitment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eYamaha YZ250F — Select the correct model year when ordering.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eA must-have upgrade for serious MX and XC racers looking to get the most out of their Yamaha YZ250F.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"BNR Motorsports","offers":[{"title":"2021-2023","offer_id":49482719592638,"sku":null,"price":859.99,"currency_code":"USD","in_stock":true},{"title":"2024-2026","offer_id":49482719625406,"sku":null,"price":859.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0025\/8890\/1446\/files\/camera-0CE47DBB-14DA-460C-965F-5D4DE16832E4.jpg?v=1793223444"},{"product_id":"rrp-front-brake-master-cylinder-clamp","title":"RRP Front Brake Master Cylinder Clamp","description":"\u003cp\u003e\u003cspan\u003eUpgrade your ATV with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRRP Front Brake Master Cylinder Clamp\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, designed for durability, strength, and reliable performance in demanding racing conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCNC-machined from aluminum, this clamp provides a lightweight, durable replacement for the factory front brake master cylinder clamp.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFeatures \u0026amp; Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCNC-Machined Aluminum:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Lightweight, durable construction built for racing conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e7\/8\" Handlebar Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for standard 7\/8\" handlebar control sections.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDirect Replacement:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replaces the factory front brake master cylinder clamp.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEasy Installation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Simple bolt-on design with no permanent modifications required.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRace-Ready Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ideal for GNCC, XC, motocross, and recreational riding.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eFitment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eYamaha YFZ450R\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eYamaha YFZ450X (verify fitment)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eAdditional ATV and dirt bike applications may be compatible. Please verify mounting dimensions before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eClamp Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHandlebar Diameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 7\/8\" (22.2 mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMounting Bolt Spacing:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 38.40 mm center-to-center\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMounting Hole Diameter:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 6.75 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Front Brake Master Cylinder\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRaccoon Racing Products (RRP) – Built for Performance.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"BNR Motorsports","offers":[{"title":"Polished","offer_id":49482781687998,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":49482781720766,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":49482781753534,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":49482781786302,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0025\/8890\/1446\/files\/camera-A0F5D463-F664-41DA-9B48-EEA7E6A20FF8.jpg?v=1793228074"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0025\/8890\/1446\/collections\/library-BD4C1F3B-7183-45F6-865B-373F2ADFC1D8-L0-001.jpg?v=1793220814","url":"https:\/\/bnr-motorsports.myshopify.com\/collections\/yz250f.oembed","provider":"BNR Motorsports","version":"1.0","type":"link"}