{"product_id":"dayuan-motorcycle-carburetor-synchronizer-kit-4-gauge-2-damping-adapters-for-inline-four-tuning","title":"DAYUAN Motorcycle Carburetor Synchronizer Kit — 4-gauge (2\"), damping \u0026 adapters for inline-four tuning","description":"\u003cp\u003e\u003cstrong\u003eDAYUAN's Motorcycle Fuel Vacuum Carburetor Synchronizer is a four-gauge vacuum kit that lets you quickly read and match the intake vacuum of four carburetors for smoother engine idle and balanced throttle response.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete carb synchronizer and adjustment kit is built for multi-carb motorcycles that need precise vacuum matching. The set bundles four 2\" dial gauges with individual damping and calibration controls, all fittings, hoses, clamps, and a rugged blow-mold carry case so you can measure and tune carburetor balance at the garage or on the road. Materials and finishes are chosen to resist wear and keep readings stable, while the included adapters expand compatibility with many common motorcycle models.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit simplify synchronizing four carburetors?\u003c\/h3\u003e\n\n\u003cp\u003eThe DAYUAN kit centralizes vacuum measurement so you can compare all four carburetors side-by-side. Each gauge displays vacuum in cm\/Hg and has its own adjustment for damping and calibration, allowing you to stabilize needle movements and zero the instruments before taking readings. Using the supplied hoses, clamps and connectors you can hook up all intake ports in minutes, then make incremental adjustments until the needles align.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFour 2\" vacuum gauges with 0–76 cm\/Hg range for clear, consistent reading\u003c\/li\u003e\n  \u003cli\u003eIndividual damping and calibration controls to reduce needle flutter\u003c\/li\u003e\n  \u003cli\u003eComplete hose, clamp and adapter assortment for fast hookup\u003c\/li\u003e\n  \u003cli\u003eChrome-finished hardware for improved longevity and flow accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich motorcycles and carb types will this synchronizer work with?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit includes multiple connection pieces and extension tubes so it fits many common multi-carb motorcycles (examples include inline four-cylinder models). Adapters cover various thread sizes and hose lengths so you can connect to vacuum ports, carburetor manifolds, or intake stubs. For best results, confirm thread sizes and port accessibility on your specific model before starting.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAdapters for M6 x 0.75 mm and M6 x 1.0 mm connections\u003c\/li\u003e\n  \u003cli\u003eFour 750 mm rubber hoses and hose clamps for secure seals\u003c\/li\u003e\n  \u003cli\u003eExtension tubes in two lengths for recessed fittings\u003c\/li\u003e\n  \u003cli\u003eIntended for 4-carb setups—commonly used on inline fours like many Gs\/Kz series bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat accuracy and durability features are included?\u003c\/h3\u003e\n\n\u003cp\u003eDAYUAN designed the instrument faces and plumbing to maintain reliable, repeatable readings and resist shop wear. The gauges present clear cm\/Hg scales and the fittings use chrome-finished metal instead of softer brass to reduce corrosion and flow inconsistencies. The kit also comes in a heavy-duty blow-mold case to protect instruments during transport and storage.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e0–76 cm\/Hg gauge range, large 2\" dial for easy viewing\u003c\/li\u003e\n  \u003cli\u003eChrome-finished hardware for enhanced durability and steady airflow\u003c\/li\u003e\n  \u003cli\u003eIndividual shutoff valves for isolating cylinders when needed\u003c\/li\u003e\n  \u003cli\u003eProtective blow-mold carrying case for organized storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use the kit safely and effectively?\u003c\/h3\u003e\n\n\u003cp\u003ePark the bike on a level surface and warm the engine to normal operating temperature before measuring. Attach the hoses and adapters to the carburetor vacuum ports, open valves to allow steady readings, then adjust synchronization screws until gauge needles converge. Work methodically and re-check after minor throttle or idle changes to verify consistency.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWarm engine to operating temperature for accurate vacuum readings\u003c\/li\u003e\n  \u003cli\u003eConnect hoses, secure clamps and open valves only when ready to measure\u003c\/li\u003e\n  \u003cli\u003eAdjust carbs gradually and repeat readings until balanced\u003c\/li\u003e\n  \u003cli\u003eStore the kit in its case to protect gauges and hoses between uses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The DAYUAN Carburetor Synchronizer Kit is aimed at home mechanics, motorcycle enthusiasts, and professional technicians who service multi-carb engines and want an affordable, complete vacuum-synchronizing solution. It's especially useful for owners of older or classic bikes with four carburetors that require routine balancing, and for anyone who prefers precise, repeatable analog readings over trial-and-error adjustments.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this kit synchronise four carburetors at once?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The DAYUAN set includes four gauges and fittings so you can hook up and compare all four carburetors simultaneously.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are replacement hoses and clamps included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit supplies four rubber hoses, matching hose clamps, and multiple adapters for common connections.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DAYUAN","offers":[{"title":"Default Title","offer_id":48083975995550,"sku":"B07MT4PTWQ","price":75.45,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dayuan-front-view-kit-open_5df179da-0f43-423e-9b5a-471873006a1c.jpg?v=1785841948","url":"https:\/\/northtrailauto.ca\/products\/dayuan-motorcycle-carburetor-synchronizer-kit-4-gauge-2-damping-adapters-for-inline-four-tuning","provider":"North Trail Auto","version":"1.0","type":"link"}