{"product_id":"briggs-and-stratton-main-jet","title":"Briggs \u0026 Stratton 206 Main Jet #555742","description":"\u003cp\u003e\u003cstrong\u003eBriggs \u0026amp; Stratton 206 Main Jet\u003c\/strong\u003e (Part #555742) is the primary fuel metering jet in the Briggs 206 kart racing engine carburetor. The main jet controls fuel delivery at wide-open throttle (WOT) and upper throttle range, making it the most critical jetting component for peak power output and engine protection under maximum load.\u003c\/p\u003e\n\u003cp\u003eThis OEM main jet is precision-drilled to provide the correct fuel flow for the Briggs 206 engine at full throttle. The main jet determines whether the engine runs rich or lean at high RPM, which directly affects top-end power, engine temperature, and long-term reliability. In Briggs 206 spec racing, the main jet is a sealed component and must remain at the OEM specification—modification or replacement with non-OEM jets is not permitted in sanctioned competition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Briggs \u0026amp; Stratton\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 555742\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Briggs 206 kart racing engine carburetor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Controls fuel delivery at wide-open throttle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your Briggs 206 is running lean at full throttle (indicated by high EGT readings or detonation), a clogged or damaged main jet may be the cause. Always replace with the correct OEM jet to maintain legal engine specifications. CMC Karting stocks Briggs 206 main jets and all other carburetor jetting components.\u003c\/p\u003e","brand":"M027","offers":[{"title":"Default Title","offer_id":46618353008861,"sku":"555742","price":11.55,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMCProductImage2-206mainjet.png?v=1753840944","url":"https:\/\/cmckarting.com\/products\/briggs-and-stratton-main-jet","provider":"CMC Karting","version":"1.0","type":"link"}