{"product_id":"gy6-50cc-139qmb-brake-sight-lens-replacement-18mm","title":"GY6 50cc (139QMB) Brake Sight Lens Replacement 18mm","description":"\u003ch2\u003eBrake Master Cylinder Sight Window for GY6 50cc and 139QMB Scooters\u003c\/h2\u003e\u003cp\u003eThis brake sight window is made for the brake master cylinder used on GY6 and 139QMB engines. It lets you check the brake fluid level while the system stays sealed. It is one of the \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e that makes routine checks simple, so you don't have to swap out the whole master cylinder.\u003c\/p\u003e\u003ch3\u003eDrop-In Replacement for Stock Parts\u003c\/h3\u003e\u003cp\u003eThis sight window works as an OEM-equivalent part and sits right into the factory brake master cylinders on QMB and GY6 engines. It is built to a tight fit, so restoring your brake system is straightforward.\u003c\/p\u003e\u003ch3\u003eComplete Kit for Installation\u003c\/h3\u003e\u003cp\u003eAn O-ring gasket comes with the sight window to help create a secure, leak-free seal. This gasket plays an important role in keeping the brake fluid at the correct level and preventing leaks that could affect braking.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 18mm Outer Diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Sight lens and O-ring gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6-based 50cc through 169cc scooters with QM or FM engine codes (139QMB, 157QMJ families)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 139QMB-based 50cc and 80cc engines (139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, other QMA and QMB models)\u003c\/li\u003e\n\u003cli\u003eGY6 157QMJ-based 125cc, 150cc and 169cc engines (157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A, other QMJ, QMK and QMI models)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check your engine code. If it contains QM or FM, the sight window will fit your stock brake master cylinder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-lights\"\u003eScooter Lights \u0026amp; Bulbs\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-brakes\"\u003eScooter Brake Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51137939800121,"sku":"TT-23960","price":2.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/brake-sight-lens-replacement-18mm-for-gy6-50cc-139qmb-1.jpg?v=1794369836","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-brake-sight-lens-replacement-18mm","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}