{"product_id":"blue-line-brake-master-cylinder-sight-lens-replacement-gy6-1000-1378","title":"Blue Line Brake Sight Lens Replacement 18mm | GY6 139QMB","description":"\u003cp\u003eKeep your brake fluid level visible and your system sealed with the \u003cstrong\u003eBlue Line Brake Master Cylinder Sight Lens\u003c\/strong\u003e. This OEM-equivalent replacement lens fits the stock brake master cylinder on 139QMB and GY6-based scooters, and includes an o-ring gasket for a leak-free seal.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent:\u003c\/strong\u003e Direct-fit replacement for stock brake master cylinders on QMB and GY6 engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes O-Ring Gasket:\u003c\/strong\u003e Everything needed for a complete, leak-free installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Fits 50cc through 169cc engines with QM or FM engine codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAffordable Maintenance:\u003c\/strong\u003e Restore brake fluid visibility without replacing the entire master cylinder.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLens Outer Diameter:\u003c\/strong\u003e 18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Sight lens + o-ring gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1000-1378\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e139QMB-based 50cc \/ 80cc engines:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e139QMA\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e139QMB\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1P39QMB\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eYN139QMB\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e139FMA-2\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eBN139QMB\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e147QMD\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOther QMA models\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOther QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003e157QMJ-based 125cc \/ 150cc \/ 169cc engines:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e157QMJ\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e161QMK\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e152QMI\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1P61QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eYN1P57QMJ\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1P52FMI\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e154FMI\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eJJ157QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eBN161QMK-A\u003c\/td\u003e\n\u003ctd style=\"padding: 6px; border: 1px solid #ddd;\"\u003eOther QMJ, QMK, QMI models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cblockquote\u003e\n\u003cstrong\u003eTip:\u003c\/strong\u003e Don't see your engine listed? If your engine code includes \"QM\" or \"FM\", this lens is compatible with your vehicle.\u003c\/blockquote\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e?? \u003ca href=\"https:\/\/www.p65warnings.ca.gov\" target=\"_blank\"\u003eCalifornia Prop 65 Warning\u003c\/a\u003e\u003c\/p\u003e","brand":"BLUE LINE","offers":[{"title":"Default Title","offer_id":46762025910552,"sku":"1000-1378","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/1000-1378_9903fd03-3930-4515-8308-f167426e3860.jpg?v=1695336643","url":"https:\/\/www.scooterworks.com\/products\/blue-line-brake-master-cylinder-sight-lens-replacement-gy6-1000-1378","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}