socalmike_cb72
'80 Honda CB900C; '72 Honda CB350; '65 Honda C102
So I stripped the threads on the engine head on my cb350 for the spark plugs. I went and bought a M12 x 1.25 helicoil kit, and installed it. But the tap hardly drilled any material out, and the helicoil installed won't take thw spark plug.
Did I get the size wrong? Should it have been a M14 x 1.25?
Did I get the size wrong? Should it have been a M14 x 1.25?