{"product_id":"zippers-thunderjet-tuning-kit-harley-keihin-cv-s-s-super-e-b-g-d-carb","title":"Zippers Thunderjet Tuning Kit Harley Keihin CV \u0026 S\u0026S Super E B G D Carb","description":"\u003cp\u003eThe ThunderJet™ is a jet-able, externally mounted third fuel circuit designed to dramatically improve the performance and tuning capabilities of your carburetor. By adding a dedicated high-speed fuel circuit, the ThunderJet™ allows existing fuel circuits to be more precisely tuned to specific power ranges, resulting in a significantly more balanced fuel curve and improved throttle response.\u003c\/p\u003e\n\n\u003cp\u003eStandard two-circuit carburetors typically rely on an intermediate circuit and a main jet circuit to cover the entire RPM range. This often forces riders into a performance compromise: tuning for crisp mid-range response can leave the top-end lacking, while increasing the main jet for top-end power often causes the mid-range to run rich, leading to flat spots or hesitation. The ThunderJet™ solves this problem by delivering necessary fuel to the engine at higher RPMs (4500 and up). This allows you to utilize the main jet to tune for smooth, broad mid-range power while supplementing the top-end independently.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePerformance Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEliminates flat spots and hesitation throughout the RPM range.\u003c\/li\u003e\n  \u003cli\u003eProvides a significant increase in power felt across the entire (extended) RPM range.\u003c\/li\u003e\n  \u003cli\u003eAllows for a more balanced fuel curve and finer tuning of specific power ranges.\u003c\/li\u003e\n  \u003cli\u003eOne of the most cost-effective \"horsepower per dollar\" upgrades available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications \u0026amp; Compatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ThunderJet™ is compatible with Keihin CV carburetors as well as all models of S\u0026amp;S carburetors. Please note that installation requires minor machining to the carburetor body and float bowl to accommodate the new circuit. For owners of Keihin CV carburetors, a flat-backed air cleaner assembly (such as Zipper’s or the Screamin’ Eagle®) is required for proper fitment.\u003c\/p\u003e\n\n\u003cp\u003eEach kit comes complete with comprehensive installation and tuning instructions, along with extra jets to ensure you can achieve the perfect fuel delivery for your specific engine configuration. Join thousands of satisfied riders worldwide who have optimized their Harley-Davidson® performance with this essential tuning tool.\u003c\/p\u003e","brand":"Zippers Performance","offers":[{"title":"Keihin Cv \/ Satin","offer_id":42446773813319,"sku":"Z113-021","price":69.95,"currency_code":"USD","in_stock":true},{"title":"Keihin Cv \/ Red","offer_id":42446773846087,"sku":"Z113-018","price":69.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super G \/ D \/ Satin","offer_id":42446773878855,"sku":"Z113-032","price":81.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super G \/ D \/ Red","offer_id":42446773911623,"sku":"Z113-034","price":81.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super G \/ D \/ Black","offer_id":42446773944391,"sku":"Z113-036","price":81.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super E \/ B \/ Satin","offer_id":42446773977159,"sku":"Z113-012","price":69.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super E \/ B \/ Red","offer_id":42446774009927,"sku":"Z113-014","price":69.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026s Super E \/ B \/ Black","offer_id":42446774042695,"sku":"Z113-016","price":69.95,"currency_code":"USD","in_stock":true},{"title":"S\u0026S Super G \/ D \/ Blue","offer_id":42446794424391,"sku":"Z113-035","price":81.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/5953\/2615\/files\/5_6_24.jpg?v=1769729067","url":"https:\/\/easternperformance.com\/products\/zippers-thunderjet-tuning-kit-harley-keihin-cv-s-s-super-e-b-g-d-carb","provider":"Eastern Performance Cycles","version":"1.0","type":"link"}