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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 19 May 2007
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overcharging 94 xt 600

i got a 94 xt 600 with some charging probs. When u have running if u plug wiring in that goes to regulator,the wires get hot !!! I got this bike cheap cause of this problem and like to get it goin..Anyone think its just the regulator???? Any info appreacated
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  #2  
Old 19 May 2007
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Probably.

If JUST the white wires (from the generator to the regulator/rectifier) are getting hot, it's probable the regulator has shorted out inside and the generator is just working against a short circuit. If ALL the wires are getting hot (white, Red, brown and black) then you could have a fault (a short to ground) in the loom downstream of the regulator. If JUST the red, brown, black wires are getting hot, the regulator/rectifier has probably shorted out inside and the battery is trying to cook it - though this ought to have blown the main fuse.

if you have a multimeter you could check the resistances of the circuit.

Easiest thing is to swap the regulator/rectifier unit and see if it fixes the problem
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Old 10 Jun 2007
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red wires were melted white get hot in about ten seconds if i unplug 3 white wires it ok but no charging ! I replaced the bad wires and in just thinking my alt must be good and im just gonna try another reg
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  #4  
Old 15 Jun 2007
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Question

Sounds like hi resistance are you sure the plug isn't corroded? Mine did the same thing and that was the culprit!
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