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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: JcJ TN K75s on September 10, 2013, 05:49:18 PM
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Somewhere in a post on here it seems like i remember reading that the high temp light should come on with the ABS, oil prressure and battery lights when the key is on, before the engine is cranked. Mine does not. Wouldn't bother me, but I've never seen it come on at all and wonder about its functionality. That also wouldn't be a big deal, but I have also never seen the radiator fan come on. Ive had this 1993 K75s (which had been dropped at some point) for less than two months, and all my trips have been easy rides (5-8 miles on country roads) but this is not only my first K, but also my first water-cooled motorcycle. So I am in strange territory and not wanting to break anything. Especially since frankenduck has a fan I can afford. :) Thanks from a newb.
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Not sure about the light, I am at a wildfire so can't check mine, but you should be able to turn the actual fan blades by hand. If not you have trouble. The other thing is run the bike till the temp gets up to almost red line and see if the fan comes on. DO NOT LET it get into the red thou. Mine would turn and I too took it on short trips, so never knew any better, then I was stopped in heat and the fan never came on. Tore it apart and the brush holders on one side had melted and the brushes were ok, but the holder was melted, so I bought a Ducker used fan. Since then I have learned there is a source for high temp brushes that fit the fans.
Don't let the temp get too high when testing it.
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what i do to check fan is... start moto on center stand... wait for fan to kick on... will be able to hear it... listen for it to cycle...
could take 20 or 30 minutes for it to kick on and cycle...
j o
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The temp light does not come on unless the bike is too hot. It doesn't turn on when the key is on, engine off.
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Thanks all. My fan blades do turn freely. I don't have a temp gauge, though. Just a tach, speedo, and a bunch of lights. That's one reason I'm so skittish about this (non?)issue.
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If you can spin the fan with your finger, don't worry about it. (That's been my approach, and it's worked so far.)
Or, make yourself feel better by draining and refilling the coolant. Then forget about it for five years.