tom636 Posted March 10, 2016 Report Share Posted March 10, 2016 Hi all, I have bought my first trials and had it for 2 months now and have lots of trouble with it. The bike is a 2004 txt pro 250, I replaced the lenonni rectifier for a new one, new fan motor, swapped the 415 regulater for a second hand one and all worked fine for a month then the fan stopped working again! checked everything and im only getting 4v from the yellow stator wire(bike runs fine) any ideas? Quote Link to comment Share on other sites More sharing options...
dadof2 Posted March 10, 2016 Report Share Posted March 10, 2016 The coil(s) that generate the electricity for the fan could be failing The new regulator / rectifier you have fitted could have failed. Is it a combined regulator rectifier or are they separate items. Check the coil(s) output with you meter on AC volts Check the coil(s) resistance with the regulator rectifier disconncted Quote Link to comment Share on other sites More sharing options...
tom636 Posted March 10, 2016 Author Report Share Posted March 10, 2016 Hi, when you say coils do you mean stator coils? rectifier and regulator are separates. Thanks Quote Link to comment Share on other sites More sharing options...
copemech Posted March 12, 2016 Report Share Posted March 12, 2016 In a case like that, and the fact you have SOME voltage, at least something is working. A shorted regulator will take system voltage down, as it simply shunts it to earth. Unplug the regulator and re test at idle only to avoid excess voltage, if the voltage comes up, regulator is faulty. Rectifier open or shorted can have similar effect, unplug it! Fan will not run without it because fan requires DC voltage, but a 12V light bulb does not care, or switch DVOM to AC and see where you are at. Have you tested the motor itself? Requires a separate 12V battery to power it. Checking the stator coil continuity is easy enough. Disconnect it and ohm it out to earth on motor. Should have continuity, and resistance is quite low, I think 3-5 ohms sounds about right. Quote Link to comment Share on other sites More sharing options...
tom636 Posted March 12, 2016 Author Report Share Posted March 12, 2016 Thanks for the replys, I have had a good look today and unplugged everything and now I'm gettinging readings between 14v and 20v so all is pointing at regulator I shall order a new one and report back thanks Quote Link to comment Share on other sites More sharing options...
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