What is normal running temperature and when should the fan go on?

Discussion in '1st & 2nd Generation 1983-1989' started by VFRfrom818, May 7, 2012.

  1. VFRfrom818

    VFRfrom818 New Member

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    I have a 1986 700 that I am slowly putting back together. I just changed the radiator and it seems to be holding, but I am not sure what the running temperature should be. I rode the bike today and the needle moved about a 1/3 of the way and stayed there. Is this normal running temp? I kind of assumed it should sit in the center/middle of the temp gauge.?

    Also, last night I was trying to get the fan to turn on, so I let the bike sit running. The needle got past middle/center and worked it's way up to 3/4, but no fan. ??

    I know the fan is good cause it was working with the old radiator. I'm guessing I didn't connect it correctly. Perhaps I need a new sensor?

    Thanks.
     


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  2. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    the fan switch, screwed into the radiator, completes the ground circuit allowing the fan to come on. Take a jumper wire connected to ground and touch it to the wire that goes to the switch in the radiator and see if the fan will come on.
     


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  3. VFRfrom818

    VFRfrom818 New Member

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    Excellent idea. Thanks. I also read on another post that these bikes generally run "hot". Is this true?

    Someone also recommended using something other than anti-freeze. What would you recommend? I live in So. Cali and summer is comming.
     


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  4. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    Water Wetter is the popular alternative to Anti-freeze for more efficient heat transfer.
     


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  5. squirrelman

    squirrelman Member

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    Normal temp=1/3 scale Stop and go traffic on a hot day=3/4 scale, and fan should switch on.

    The thermoswitch is not reliable, so consider setting up a manual switch wired in parallel with it so you have positive control of your cooling fan at all times.

    If you anticipate traffic slow-downs and activate your fan before the thermoswitch kicks in, the engine will stay cooler.
     


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  6. paradox11235

    paradox11235 New Member

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    I don't think mine even gets up to 1/3... Maybe my thermostat is stuck open?
     


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  7. VFRfrom818

    VFRfrom818 New Member

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    I've been running the bike now for a few days, and in traffic, she stays about 1/3. Once I get to stop and go traffic, it does climp half way. I just put all the fairings back on, so let's see how she performs. I will consider the Water Wetter and the direct switch on the fan. Thanks guys.!!
     


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