I have a 85 ninja zx900 and I keep melting cdi boxes. I think I found the problem with a inop shorted tach but I am afraid to run the bike as the cdi box is getting pretty warm. I cut the wire that runs to the tach and it runs good, but the cdi still gets warm. Has anybody had a problem like this B4 with a shorted tach? Maybe a bad coil when hot? The resistance of the primary and secondary on both coils is within specs so I don't think the coils are bad.
2007-05-24 03:14:26 · 2 answers · asked by bigboy56073 2 in Cars & Transportation ➔ Motorcycles
Check your voltage regulator.
Not for sure, but just in case.
The reason for the guess:
A CB650 came out of the shop after having the alternator rebuilt. Also installed was a new regulator rectifier pack. It died on the way home. (professional mechanic)
Parts found bad: regulator portion of rectifier, CDI box (one of two), ignition wire from kill switch fried.
Seems the regulator died sending a spike, CDI fried shorting to ground internally, which in turn cooked the wiring.
2007-05-24 10:00:46 · answer #1 · answered by Firecracker . 7 · 0⤊ 0⤋
1985 Ninja 900
2016-11-14 10:05:39 · answer #2 · answered by ? 4 · 0⤊ 0⤋