NCY 50mm top-end gasket kit for Honda Dio, Elite 50, & SYM DD50 big bore builds. Head and base gaskets sized for 50mm bore. Sold as a set. NCY 50mm top-end gasket kit for Honda Dio, Elite 50, & SYM DD50 big bore builds. Head and base gaskets sized for 50mm bore. Sold as a set.
NCY 50mm top-end gasket kit for Honda Dio, Elite 50, & SYM DD50 big bore builds. Head and base gaskets sized for 50mm bore. Sold as a set.

NCY

NCY Gasket Kit (50mm); Dio/DD50 Big Bore Kit

SKU 1100-1499
$16.00 Sold out
Shipping calculated at checkout.

Expected back in stock: Aug 19, 2026

Description

The NCY 50mm Gasket Kit provides all the top-end sealing gaskets needed for a complete big bore installation or cylinder rebuild on the Honda Dio, Elite 50 (AF16E), and compatible SYM DD50 platforms running a 50mm bore. Proper gasket replacement is essential any time the cylinder head or jug is removed — reusing old gaskets risks compression leaks, coolant intrusion, and oil seepage that can quickly undo the work of a fresh top-end build. This kit is sized specifically for the 50mm bore diameter to ensure correct sealing surface coverage and crush thickness.

  • Fits Honda Dio, Elite 50 (AF16E), and compatible SYM DD50 platforms with 50mm big bore cylinders
  • Includes head gasket and base gasket for a complete top-end seal
  • Essential replacement at every top-end rebuild or big bore installation
  • Pairs directly with the NCY 50mm Piston Ring Set for a complete top-end rebuild kit
  • Sold as a set

California Residents: This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.
Product Diagrams
Model Fitments

Honda Dio, SYM DD50
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  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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