Blue Line Right Crankcase Cover Kit - 50cc 139QMB Series A

Product Overview Restore your scooter's engine integrity with the Blue Line GY6 50cc 139QMB Right Crankcase Cover Kit . Designed specifically for Series A 50cc 139QMB 4-stroke engines, this complete OEM-style assembly offers a reliable, direct-fit solution for cracked or damaged covers. Blue Line components are engineered to provide factory quality at a fraction of the cost. This comprehensive kit includes everything needed for a successful installation, ensuring a leak-free seal and proper oil circulation for your engine's right side. Key Features Complete Replacement Kit: Includes the crankcase cover, gasket, dipstick, oil screen, and all necessary mounting hardware. OEM Quality: Blue Line parts are precision-engineered to match OEM factory specifications for fitment and durability. Ready to Install: Comes with pre-installed dowels and seals to simplify the repair process. Series A Specific: Optimized for 54mm stud spacing configurations. Technical Specifications Attribute Specification Brand Blue Line SKU 1100-1305 Engine Fitment 50cc 139QMB 4T (Series A) Stud Spacing 54mm Dimensions 17" L x 7" W x 3" H Compatibility & Fitment Fits 50cc / 80cc engines with the following engine codes: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, and 147QMD. Fitment Tip: To confirm you have a Series A engine, remove your valve cover and measure the stud spacing. Series A = 54mm . If your spacing is 57mm, you require a Series B cover.