Spark Plug NGK C7HSA copper M10x1, wrench width 16mm short thread similar to BOSCH U4AC/ TORCH A7RTC/ DENSO U22FS-U for 4-stroke china scooter | SIP-Scootershop
Amazon.com: TORCH A7RTC Screw Terminal Spark Plug Replace for NGK 4549 CR7HSA Spark Plug, for Denso 4008/U22FSR-U 5383/IUF22, for Bosch UR3AS Spark Plug, for Champion Z9Y Copper Plus Spark Plug 808, OEM,