Hey all, my son and I are rebuilding an 1986 xr80 with a 1996 xr80 motor. I purchased a new spark plug (ngk cr7hix) and found it was to small as it slides into the cylinder head. The spark plug is listed as a 10mm and I had a 12 mm that threads right in. I looked on the side of the cylinder head and it's stamped KA8-2 but I can't seem to find any info on it. Anyone know what kind of cylinder head this is? My only idea is to get a spark plug one size bigger ngk dr8hs.
Thanks
Levi