Meadowhawk
XS400 Member
Hello all. Hoping someone can help me eradicate the little gremlin living in my 82 Yamaha XS400RJ. She's a work in progress and was running fine but now will not start. Fuel is flowing and 100 psi pressure on one side and 135 psi on the other. I pulled the plugs (which are only a few weeks old...NGK DR8ES-L) and there's no spark from either side. However, a screwdriver in the plug cap does give off a spark when held near the cooling fins (from a good distance as well). A neighbour suggested an alternate spark plug from a car...which gave off a great spark from an even wider gap than the original NGK. I tried the original NGKs again with a much smaller gap and I did get a very weak spark, not enough to start the motor up again when I put them back in. Has anyone ever experienced this issue?