{"product_id":"m6-carburetor-main-jet-nozzle-for-derotto-carburettors-phbn-phva-brass-main-measuring-hole-replacement-jet-available-in-31-sizes-from-55-to-150-for-fuel-system-modification-and-tuning","title":"M6 carburetor main jet nozzle for Derotto carburettors PHBN PHVA, brass main measuring hole replacement jet available in 31 sizes from 55 to 150 for fuel system modification and tuning","description":"\u003ch1\u003eM6 Brass Main Jet Nozzle for Derotto PHBN and PHVA Carburettor Modification and Tuning\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass M6 carburetor main jet nozzle for Derotto PHBN and 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 M6 threaded main jet is a fundamental component for anyone undertaking maintenance or performance tuning on Derotto carburettors. Specifically designed for the PHBN and PHVA model series, this brass nozzle serves as a direct replacement part, allowing for precise adjustment of the fuel mixture via the main measuring hole. The availability of thirty-one distinct size options, from 55 to 150, provides a granular level of control for mechanics and enthusiasts aiming to optimise engine performance, correct running issues, or adapt to modifications. By replacing the stock main jet, you can directly influence the air-fuel ratio in the main circuit, which is crucial for throttle response and overall engine efficiency.\u003c\/p\u003e\n\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass M6 carburetor main jet nozzle for Derotto PHBN and 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\u003eThis replacement jet is built with a focus on compatibility and precise fuel metering. Its design centres on the standardised M6 thread, which matches the threaded orifice in the carburetor float bowl or main body. The construction from brass offers practical benefits for a fuel system component, including resistance to degradation from petrol and consistent machining tolerances for accurate flow rates.\u003c\/p\u003e\n\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\n\u003cp\u003eThe jet is made from brass, a traditional and reliable material for carburetor components. Brass provides good corrosion resistance against fuel and its additives, helping to maintain the precise internal diameter of the measuring hole over time. The material's properties also allow it to be machined to very tight tolerances, which is essential for creating the exact flow characteristics denoted by each jet size number. The build quality focuses on the accuracy of the threaded connection and the consistency of the fuel passage, ensuring it functions as a direct swap for the original part.\u003c\/p\u003e\n\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\n\u003cp\u003eThe core practical feature is the extensive range of thirty-one available sizes. The sizes progress from 55, 58, 60, 62, 65, 68, 70, 72, 75, 78, 80, 82, 85, 88, 90, 92, 95, and 98, then continue from 100, 102, 105, 108, 110, 112, 115, 120, 125, 130, 135, 140, 145, up to 150. This wide selection means you are highly likely to find the exact size needed for fine-tuning, whether you are making a slight adjustment or a significant change to the fuel delivery. The M6 thread is the critical fitment specification, ensuring it screws correctly into the designated main jet location on compatible Derotto carburettors.\u003c\/p\u003e\n\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass M6 carburetor main jet nozzle for Derotto PHBN and 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 component has a specific and technical application within the vehicle's fuel system. Its primary use is to replace the existing main jet in a carburetor to alter the amount of fuel delivered to the engine during mid-to-wide-open throttle operation. Correct jet selection and installation are key to achieving desired performance outcomes or resolving running problems.\u003c\/p\u003e\n\u003ch3\u003eEvent or Professional Use\u003c\/h3\u003e\n\u003cp\u003eFor professional mechanics, tuners, or enthusiasts involved in motorsport, engine rebuilding, or restoration, this jet is a essential tuning tool. The range of sizes allows for dyno tuning, adaptation to aftermarket air filters or exhaust systems, and correction of fuel mixture issues identified through plug readings or exhaust gas analysis. Having access to the correct size jet is necessary for achieving optimal air-fuel ratios for performance, reliability, or compliance with emissions standards during professional servicing.\u003c\/p\u003e\n\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\n\u003cp\u003eFor the home mechanic maintaining a motorcycle, scooter, or other small engine equipment fitted with a Derotto carburettor, this jet enables DIY carburetor servicing. It can be used to replace a worn or clogged jet, to correct a persistently rich or lean running condition diagnosed through symptoms like poor fuel economy, hesitation, or lack of power, or to recalibrate the carburetor after cleaning. Selecting the appropriate size from the available range based on the original specification or tuning guides allows for effective home workshop repairs.\u003c\/p\u003e\n\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass M6 carburetor main jet nozzle for Derotto PHBN and 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 of this product lies in its specificity, material choice, and the control it returns to the user. It addresses the need for a reliable, correctly sized replacement part that is often not available as an individual item from mainstream retailers, preventing the need to purchase an entire carburetor rebuild kit when only the main jet is required.\u003c\/p\u003e\n\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\n\u003cp\u003eAs a brass component, the jet can be cleaned and reused if it becomes obstructed, provided it is not physically damaged. Its durability stems from the material's inherent properties, meaning that with careful installation and removal using proper tools, it can serve as a long-term part of the fuel system. The low maintenance aspect is simply that once the correct size is installed and the carburetor is tuned, no further adjustment to the jet itself is needed under stable operating conditions.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\n\u003cp\u003eThis product is chosen for its direct compatibility with Derotto PHBN and PHVA carburettors and the unparalleled selection of sizes. It offers a practical solution for obtaining a single, specific main jet rather than a full kit. The brass construction aligns with expected quality for such a component, and the clear size labelling allows for precise selection. For anyone needing to modify, repair, or tune one of these specific carburetor models, this jet provides the essential means to adjust the fundamental parameter of main fuel flow.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass M6 carburetor main jet nozzle for Derotto PHBN and 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 M6 carburetor main jet nozzle for Derotto PHBN and 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 M6 carburetor main jet nozzle for Derotto PHBN and 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":"psdxp6-30","offers":[{"title":"Size 95","offer_id":54874321387862,"sku":"CJYD195054417QJ","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 135","offer_id":54874321420630,"sku":"CJYD195054429CX","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 85","offer_id":54874321453398,"sku":"CJYD195054413MN","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 90","offer_id":54874321486166,"sku":"CJYD195054415OL","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 80","offer_id":54874321518934,"sku":"CJYD195054411KP","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 82","offer_id":54874321551702,"sku":"CJYD195054412LO","price":10.68,"currency_code":"GBP","in_stock":true},{"title":"Size 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