Hi
In previous posts Eddie has recommended NGK B6HS, for all the postwar bikes.
At the moment I have Champion J8C, which is the plug originally listed in the Handbook for my T35 (1947). I was about to order the B6HS, but have just noticed that the J8 is a 3/8" reach and the B6HS is 1/2" reach. Is this right?
Graham