Originally Posted by chistoso
Has anyone had any piston clearance issues with the NGK BP6HS Spark Plug? It is just a bit longer than the stock one.
If you haven't installed it yet, do it and take wrench (14mm/socket) and rotate the crankshaft with the magnet nut (clockwise). Do it slow just in case it hits the piston, which I don't think it will. If it does you can either add a head gasket or install a washer on the plug.