The CR9EH-9 spark plug needs a 16mm or 5/8" socket.
18MM
5/8"
18 mm
11/16" (18mm) deep well socket
18mm My 2005 Kymco 250cc Grandvista / Grand Dink takes this plug and I use a standard 3/8" drive 18mm Deep socket when changing the plug because none of my other sparkplug deep sockets fit.
for a 2.4 ngk-tr55 plug
The NGK CR5HSB spark plug typically requires a 13/16-inch (21 mm) spark plug wrench for removal and installation. It's important to use the correct size to ensure a proper fit and avoid damaging the spark plug during servicing. Always check the specifications or the packaging for confirmation, as variations may exist.
Ngk - dr8es-l
Use NGK MOdel # d7ea WITH A GAP SIZE OF 0.028
I'm using NGK Iridium plugs, CR7EIX with the gap set to 0.7mm, as per the UK NGK website.
Other spark plug brands which cross-reference/interchange with the Champion QC12YC include: NGK: BCPR5ES Denso: Q16PR-U As for what applications the spark plug fits, it fits various European applications, such as BMW, Mercedes, and Saab.
NGK BPM7A is the one you will need