Bjorn
XS650 Addict
that clever
Yup... it appears that the primary insulation is breaking down when it gets hot. Sounds like a bad coil.I find the 7-10 ohm resistance between the primary leads of the coil and ground pretty weird.
Happened to me too When I got mine it had a cut wire, but right at the pickup shell for some unknown reason. It was held together by insulation only, making it intermittent. I whittled back a little bit of the shell and soldered the two wires back together. It lasted for years but eventually developed an open coil for some reason.boom cheap bike was a runner. Happened to me also.
That's probably easy to explain. The TCI red side has 7 ohms to ground and the 10 on the other side is that 7 plus the 3 of the coil itself. Measure the red disconnected to test the theory. With both disconnected should be completely open to ground. My biggest share of problems was with the coil until I put on a used Honda MP-08 that I'm always yappin about on here. Also had a swollen and stuck float needle for awhile that imitated an ignition problem. Be aware that a coil can measure fine but be bad, because the meter is using low voltage to test and high voltage behaves differently.
- secondly i measured the resistance between the primary leads and ground. Here i found something weird: I would measure around 7 ohms between the red (hot) wire to the coil and ground. and around 10 ohm between the orange (signal) and the ground.....
Second and third pic show the TCI disconnected. I'm guessin' he checked the coil with it like that....That's probably easy to explain. The TCI red side has 7 ohms to ground and the 10 on the other side is that 7 plus the 3 of the coil itself. Measure the red disconnected to test the theory. With both disconnected should be completely open to ground. My biggest share of problems was with the coil until I put on a used Honda MP-08 that I'm always yappin about on here. Also had a swollen and stuck float needle for awhile that imitated an ignition problem. Be aware that a coil can measure fine but be bad, because the meter is using low voltage to test and high voltage behaves differently.
That's probably easy to explain. The TCI red side has 7 ohms to ground and the 10 on the other side is that 7 plus the 3 of the coil itself. Measure the red disconnected to test the theory. With both disconnected should be completely open to ground. My biggest share of problems was with the coil until I put on a used Honda MP-08 that I'm always yappin about on here. Also had a swollen and stuck float needle for awhile that imitated an ignition problem. Be aware that a coil can measure fine but be bad, because the meter is using low voltage to test and high voltage behaves differently.