{"product_id":"carburetor-main-jet-nozzle-m6-thread-measuring-hole-size-55-150-for-derotto-phbn-phva-carburettor-modification-and-tuning-replacement-part","title":"Carburetor main jet nozzle M6 thread measuring hole size 55-150 for Derotto PHBN PHVA carburettor modification and tuning replacement part","description":"\u003ch1\u003eM6 Thread Carburettor Main Jet Nozzle for Derotto PHBN and PHVA Tuning\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/0fce499c-198f-4a36-8928-7be5f518ad20.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThis individual M6 threaded main jet is a core component for adjusting the fuel delivery on Derotto PHBN and PHVA series carburettors. The main jet controls the amount of fuel mixed with air in the carburettor’s main circuit, directly influencing engine performance, throttle response, and fuel economy. Replacing the stock jet with a different size is a fundamental step in tuning an engine after modifications like air filter or exhaust changes, or for optimising performance at different altitudes. This specific jet features the standard M6 thread pattern and is offered in a single unit, allowing you to purchase the exact size needed for your tuning project or as a direct replacement for a worn or damaged jet.\u003c\/p\u003e\n\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/1003e8ca-abaf-4730-8a26-87e5cdc38482.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eDesigned as a direct replacement and tuning part, this jet's specifications are defined by its thread, material, and the critical measurement of its orifice.\u003c\/p\u003e\n\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\n\u003cp\u003eThe jet is constructed from brass, the traditional and practical choice for carburettor fuel metering components. Brass offers good corrosion resistance against fuels and can be precision-machined to create the consistent, calibrated orifice that defines the jet's size. The external threads are cut to the M6 specification, ensuring a secure fit into the matching threaded port in the compatible carburettor body.\u003c\/p\u003e\n\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\n\u003cp\u003eThe key specification is the orifice size, denoted by a number typically stamped on the jet. This product is available in 31 discrete sizes ranging from #55 to #150. A lower number indicates a smaller hole and a leaner fuel mixture, while a higher number indicates a larger hole and a richer mixture. It is crucial to select the size appropriate for your engine’s current setup and desired tuning outcome. The product listing confirms compatibility with Derotto PHBN and PHVA carburettor models.\u003c\/p\u003e\n\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/273f69be-1448-4d14-949f-e2dfed74d32a.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThis part serves a specific technical function within the fuel system, applicable in both repair and performance contexts.\u003c\/p\u003e\n\u003ch3\u003eEvent or Professional Use\u003c\/h3\u003e\n\u003cp\u003eFor motorsport applications or professional tuning, having access to individual jets of specific sizes is essential. Tuners often experiment with different jet sizes to achieve an optimal air\/fuel ratio for a particular track, weather condition, or engine configuration. This jet allows for that precise adjustment on supported Derotto carburettors used in various small engines, from motorcycles to garden machinery.\u003c\/p\u003e\n\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\n\u003cp\u003eFor the home mechanic, this jet serves as a straightforward replacement part. If a carburettor is running poorly—perhaps sputtering at high throttle or lacking power—a worn or incorrectly sized main jet could be the cause. Replacing it with a new jet of the correct, specified size can restore proper engine operation. It is also a necessary part if reverting a modified engine back to its standard configuration.\u003c\/p\u003e\n\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/5c7bf283-56ca-4a08-9450-e29c84ce0d24.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe value lies in its role as a definitive, specification-driven component for engine management.\u003c\/p\u003e\n\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\n\u003cp\u003eAs a brass component, the jet itself is durable and, if kept clean, can be reused. Maintenance involves ensuring the tiny orifice is not clogged by debris from the fuel system. Using an in-line fuel filter is recommended to protect all carburettor jets. The single-unit packaging means you buy only what you need, avoiding the cost of a full kit when only one specific size is required.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\n\u003cp\u003eThis product provides a verified compatible main jet for Derotto PHBN\/PHVA carburettors with a clearly stated M6 thread and a wide selection of orifice sizes. It addresses the need for a precise, factory-specification part for repair or a calibrated component for custom tuning. The focus is on the factual specifications—thread size, material, jet number range, and compatibility—that allow for an informed purchase decision based on your engine's requirements.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/7b40efc9-4627-44f7-b9bc-9e02983709e6.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/9e1fdf89-670f-4865-b068-213ce48b5460.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass carburettor main jet with M6 threads for Derotto PHBN PHVA models\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US12\/1180\/2025-10-02\/original-image\/dcb302f8-fb56-4b0f-b896-736a66492cb8.webp\"\u003e\u003c\/div\u003e","brand":"2pfpkk-ds","offers":[{"title":"Size 60","offer_id":53211394736394,"sku":"CJYD195054403CX","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 70","offer_id":53211394769162,"sku":"CJYD195054407GT","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 62","offer_id":53211394801930,"sku":"CJYD195054404DW","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 135","offer_id":53211394834698,"sku":"CJYD195054429CX","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 85","offer_id":53211394867466,"sku":"CJYD195054413MN","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 90","offer_id":53211394900234,"sku":"CJYD195054415OL","price":9.58,"currency_code":"GBP","in_stock":true},{"title":"Size 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