rainey88 Posted May 6, 2014 Report Share Posted May 6, 2014 Yes i know theres a fan thread right below but doesnt exactly help me. Fans decided to not work at all while riding tonight just wondered whats the quickest way of resolving the problem as the bike over heated and spat abit of coolant out! I take it the little black box on the fan unit is some sort of switch for the thermostat which is the enclosed unit in the top of the rad? The bike is a 250 2012 pro, pretty much asking whats the first thing to check. Quote Link to comment Share on other sites More sharing options...
guys Posted May 6, 2014 Report Share Posted May 6, 2014 (edited) On my 2012 280 the thermostat switch in the top of the radiator was the cause for the fan to stop working and over heating of the engine Edited May 6, 2014 by guys Quote Link to comment Share on other sites More sharing options...
copemech Posted May 7, 2014 Report Share Posted May 7, 2014 (edited) On my 2012 280 the thermostat switch in the top of the radiator was the cause for the fan to stop working and over heating of the engine Which translates to: Unplug the thermo switch on the rad and see if fan runs with the wires jumpered together! Also insure coolant is full! Edited May 7, 2014 by copemech 1 Quote Link to comment Share on other sites More sharing options...
lineaway Posted May 7, 2014 Report Share Posted May 7, 2014 Since you are home, the first thing would be hook a 12 volt source to see if it runs. Out in the field you would by pass the thermostat to continue riding. Could be as simple as a bad ground or a poor connection. Quote Link to comment Share on other sites More sharing options...
rainey88 Posted May 7, 2014 Author Report Share Posted May 7, 2014 Theres definitely coolant still there prob could do with a top up but will try the thermo switch tonight. Can you get the switch out if this is the problem? Or is it a full rad job as it looks like its enclosed into the rad at the top. Cheers guys. Quote Link to comment Share on other sites More sharing options...
guys Posted May 7, 2014 Report Share Posted May 7, 2014 This is what it looks like. The o-ring makes it a tight fit, which is why it's hard to get it out. Don't pull to hard on the leads. It's held in place by a circlips: 2 Quote Link to comment Share on other sites More sharing options...
rainey88 Posted May 8, 2014 Author Report Share Posted May 8, 2014 Right update fan runs with a power supply so i take it that means its most probably the thermo switch? Quote Link to comment Share on other sites More sharing options...
guys Posted May 8, 2014 Report Share Posted May 8, 2014 Most likely. Quote Link to comment Share on other sites More sharing options...
rainey88 Posted May 8, 2014 Author Report Share Posted May 8, 2014 Lets hope it is hopefully can source one before the weekend. Quote Link to comment Share on other sites More sharing options...
tltel Posted May 8, 2014 Report Share Posted May 8, 2014 if it's a Trial you are doing, bypass the thermo switch with a piece of wire so the fan is on all the time. just shut the bike off if queuing so you don't over heat the fan. TLTEL Quote Link to comment Share on other sites More sharing options...
rainey88 Posted May 12, 2014 Author Report Share Posted May 12, 2014 Problem solved, new thermo cured it. Top info as always guys!! 1 Quote Link to comment Share on other sites More sharing options...
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