U'm a new user and this is my first real post! ... Just picked up a 1979 xs400 bobber ... you can see a picture of it in my album under my profile. It's a fun machine for sure, but it is fouling out he plugs even after shirt rides. Facing forward on the bike.... the left cylinder is fouling out more than the right. Also, one half of the inside insulator is fouling... perhaps the side that faces the carb? ..... i guess my question is why are they fouling and what can i do to find out?
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