{"product_id":"mikuni-jet-needle-hsr45-leaner-14-2503","title":"Mikuni Jet Needle - Hsr45 Leaner","description":"\u003cp\u003eMikuni jet needle for HSR45 carburetors with a leaner taper specification, designed to reduce fuel flow and lean out the air-fuel mixture across the throttle range. Direct replacement for riders tuning carburetor performance on V-twin engines.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eLeaner taper specification\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for HSR45 Mikuni carburetors\u003c\/li\u003e\n  \u003cli\u003ePrecise fuel metering across throttle range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mikuni\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e FJ8-8CFY02-98\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 4.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits HSR45 Mikuni carburetors. This leaner taper needle is used to fine-tune air-fuel mixture on V-twin engines running HSR45 applications.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does a leaner jet needle do?\u003c\/h3\u003e\n\u003cp\u003eA leaner taper reduces fuel flow as the throttle opens, leaning out the air-fuel ratio for higher RPM operation — useful for correcting over-rich conditions.\u003c\/p\u003e\n\u003ch3\u003eWill this fit my HSR45 carburetor?\u003c\/h3\u003e\n\u003cp\u003eYes — this needle is a direct replacement for HSR45 Mikuni carburetors. Verify your carb model before ordering.\u003c\/p\u003e\n\u003ch3\u003eDo I need any other carburetor tuning parts?\u003c\/h3\u003e\n\u003cp\u003eJet needles work alongside main jets and pilot jets. You may need to adjust other components depending on your engine and riding conditions.\u003c\/p\u003e\n\u003ch3\u003eHow do I know if I need a leaner needle?\u003c\/h3\u003e\n\u003cp\u003eIf your bike runs rich (black spark plugs, poor fuel economy, rough idle), a leaner needle taper can help. Consider a full carburetor tune for best results.\u003c\/p\u003e","brand":"Mikuni","offers":[{"title":"Default Title","offer_id":53034997055599,"sku":"14-2503","price":19.37,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_7e0090e9-9376-4b0c-8a39-3e370bec078f.png?v=1779558829","url":"https:\/\/vtwinbikers.com\/products\/mikuni-jet-needle-hsr45-leaner-14-2503","provider":"Vtwinbikers","version":"1.0","type":"link"}