tman427 Posted April 28, 2015 Report Share Posted April 28, 2015 2011Beta 300 Evo 4T. Replaced the fan switch bung in the radiator (thermostat?), still does not run. I can by-past the switch, hot wire the fan direct and it runs continuous, so the fan motor is fine. Any other ideas? Many Thanks Quote Link to comment Share on other sites More sharing options...
copemech Posted April 29, 2015 Report Share Posted April 29, 2015 Well, yea, since you asked! 1- the thermo switch you put in is no good 2- you did not put coolant back init 3- the pump is not circulating hot water 4- you have a poor electrical connection 5- you did not run it long enough for the water to get hot 1 Quote Link to comment Share on other sites More sharing options...
reggie Posted April 29, 2015 Report Share Posted April 29, 2015 copemech is on the right track. Since you have already changed out the thermo switch, bench test the one that you have removed with boiling water and an ohm meter. If the switch is operating correctly that is not your problem. Is the engine hot and the radiator is not hot the coolant is not being circulated, time to check the water pump. If all the above things are correct the problem is likely to be an electrical connection, sometimes the source of these connection problems on the Evo 4t are at the regulator/rectifier which is mounted on top of the motor directly bellow the carb. Good luck, and please let us know what your troubles were. Quote Link to comment Share on other sites More sharing options...
lineaway Posted April 30, 2015 Report Share Posted April 30, 2015 The Impellor is toast.? Pull the pump housing. Quote Link to comment Share on other sites More sharing options...
tman427 Posted May 26, 2015 Author Report Share Posted May 26, 2015 Going through all of those suggestions now...I have recently replaced the impeller blade (last year) as the previous owner did not know it was missing...being plastic the motor ran hot and probably melted it. Th only item that I can think of would be the rectifier...but wouldn't that effect the fan hot wired too? Love the bike, just getting tired off the motor issues. Quote Link to comment Share on other sites More sharing options...
gottaride68 Posted November 14, 2015 Report Share Posted November 14, 2015 Rectifier...???.... why would you need AC voltage on your motorcycle? A rectifier changes DC voltage to AC....maybe you mean the stator.... Quote Link to comment Share on other sites More sharing options...
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