Hello all
I have been lurking for a while. Trying to soak up all the info I can. I recently picked up a 72 cb500.
The bike is (well was) in good running condition. First day riding put about 20 miles on it without skipping a beat. Second day seems to have a different out come, about 30 miles into a 50 mile ride the bike started to run very poorly. It seems like anything over 1/4 throttle the bike just spits and sputters. I tried putting the choke on while riding to see it would but clear up, but it just makes it worse. Also pull the plugs and the # 1 cylinder plug is black and covered in soot while the other 3 all look fine. Any infor or suggestion would be great.
Thanks
