{"product_id":"autokay-hammerhead-80t-trailmaster-mid-brake-master-cylinder-mid-size-go-kart-single-port-with-integrated-reservoir","title":"AUTOKAY Hammerhead 80T TrailMaster MID Brake Master Cylinder — Mid-Size Go-Kart Single-Port with Integrated Reservoir","description":"\u003cp\u003e\u003cstrong\u003eAUTOKAY's Hammerhead 80T \/ TrailMaster MID master cylinder is a direct-replacement single-port hydraulic brake master cylinder with reservoir designed for mid-size go-karts that use a rear-only brake line.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement master cylinder fits Hammerhead model 80T go-karts, TrailMaster Mid models, many mid-size American Sportworks kits, and various Chinese-brand mid-size carts. It replaces engines’ rear-brake hydraulic assemblies where a single outlet to the rear caliper is required and includes the reservoir integrated with the cylinder body for a compact, ready-to-install unit.\u003c\/p\u003e\n\n\u003ch3\u003eWill this master cylinder bolt into my Hammerhead 80T or TrailMaster MID?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the cylinder is built to match common mid-size go-kart mounting patterns. The overall base length and bolt spacing align with many OEM mid-frame brake mounts, making it suitable for direct replacement on the listed models without major bracket modification.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMounting bolt center-to-center: 1 3\/4\" for frame compatibility.\u003c\/li\u003e\n  \u003cli\u003eOverall base length: 4 1\/4\" to match mid-size kart brake bosses.\u003c\/li\u003e\n  \u003cli\u003eDesigned for mid-size American Sportworks and similar Chinese-brand frames.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the master cylinder connect to the brake system and what type of brake does it serve?\u003c\/h3\u003e\n\n\u003cp\u003eThis unit features a single hydraulic outlet intended to feed a rear brake caliper only, so it’s used in go-karts configured with one rear disc or drum caliper. The integrated reservoir keeps the system fed with fluid and simplifies plumbing compared with separate-reservoir systems.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSingle port output: connects directly to the rear brake caliper hose or hard line.\u003c\/li\u003e\n  \u003cli\u003eIntegrated reservoir assembly: reduces leak points and eases installation.\u003c\/li\u003e\n  \u003cli\u003eHydraulic design suitable for standard brake fluids (follow vehicle manual for fluid type).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the package contents and key physical specifications I should check before ordering?\u003c\/h3\u003e\n\n\u003cp\u003eThe product arrives as one complete master cylinder with the reservoir already attached; no additional brake components or hoses are included. Confirm the physical dimensions and port orientation on your kart before installation to ensure proper fitment and lever alignment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncluded: 1 x master cylinder with reservoir as pictured.\u003c\/li\u003e\n  \u003cli\u003eMounting bolt spacing: 1 3\/4\" (measure your mount to confirm).\u003c\/li\u003e\n  \u003cli\u003eOverall base length: 4 1\/4\" — check clearance near frame and pedal box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about installation and compatibility caveats?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation is straightforward for mechanically inclined owners: remove the old cylinder, mount the new unit using the matching bolt spacing, connect the brake hose to the single port, and bleed the system. Because this is an international-market component, some labels and instructions may differ; verify fluid type, hardware sizes, and hose thread compatibility before installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBleed brakes after installation to remove air and restore firm pedal feel.\u003c\/li\u003e\n  \u003cli\u003eCheck thread size and adapter needs for your existing brake hose\/banjo fitting.\u003c\/li\u003e\n  \u003cli\u003eInternational product notes: packaging or instructions may vary from local OEM parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This AUTOKAY master cylinder is aimed at owners and mechanics of mid-size recreational go-karts — specifically Hammerhead 80T and TrailMaster MID models — who need a direct, cost-efficient replacement single-port hydraulic master cylinder with reservoir. It's ideal for riders who maintain or restore mid-size American Sportworks and comparable Chinese-brand karts and want a compact, ready-to-install hydraulic brake assembly that matches common mid-frame mounting and rear-only brake layouts.\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: Does this master cylinder fit both Hammerhead 80T and TrailMaster MID?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s designed for Hammerhead 80T and TrailMaster MID mid-size go-karts and many similar American Sportworks and Chinese-brand models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the brake outlet single or dual port?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This master cylinder has a single hydraulic outlet intended to supply the rear brake caliper only.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AUTOKAY","offers":[{"title":"Default Title","offer_id":48084332642462,"sku":"B012MXBMDQ","price":31.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/autokay-master-cylinder-front-view.jpg?v=1785850344","url":"https:\/\/northtrailauto.ca\/products\/autokay-hammerhead-80t-trailmaster-mid-brake-master-cylinder-mid-size-go-kart-single-port-with-integrated-reservoir","provider":"North Trail Auto","version":"1.0","type":"link"}