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    radiator stock or aftermarket
    #1
    Senior Member
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    Aug 2011
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    Started tearing down my 1000cc bike engine. I see most people use a aftermarket radiator that is bigger than the stock bike radiator. I suppose i can use the stock radiator right? If i do i want to put a bigger fan on it for sure. All the sensors are mounted in the bikes radiator.
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    Re: radiator stock or aftermarket
    #2
    Senior Member
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    NW Washington
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    Just like boobs and bank account... Bigger is better. go aftermarket...
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    Re: radiator stock or aftermarket
    #3
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    Mine has two stock radiators. and in bad spots too, one right behind my seat and next to the exhaust and the other on the side of my buggy oriented so the airflow from driving doesnt flow through it. :/ BUT with that said, I never overheat, even in 100+ weather all day long it stays around 125F. The fan on the first radiator comes on at 120ish like its supposed to, but ive never seen the second fan on the second radiator turn on. If i were to have done it myself i would have like to have done aftermarket as it is a cleaner install than what I have now (twice as much plumbing running around) but hey, works great and there's bigger goals id like to get done with my buggy before I start redoing things that aint broke
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    Re: radiator stock or aftermarket
    #4
    Millenium Member RickS.'s Avatar
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    What bike motor runs at 125 all day long???
    And fan comes on at 120ish? Don't you mean 220?
    And if so all day long at 225 is hot!
    You need a larger radiator than the stock bike radiator.
    If you don't do this you WILL be running hot.
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    Re: radiator stock or aftermarket
    #5
    Protodie Master and Vendor ProtoDie's Avatar
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    May 2005
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    S.W. Michigan
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    stock radiator is way too small for buggies

    run a honda civic 2 core or 3 core radiator 12" fan and shroud
    You can get away with 1 but we run 2 of them

    Cooling






    .
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    Re: radiator stock or aftermarket
    #6
    Senior Member
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    ok sounds like ill ditch the factory and use the aftermarket and maybe make some kinda in line tube and mount all the sensors in there. Or maybe see if i can get some bungs to weld them into the radiator.
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    Re: radiator stock or aftermarket
    #7
    Senior Member
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    Mar 2012
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    I use a fiat UNO radiator that has the expansion tank mounted to the side. It is not the greatest looking unit, but I do not need to install a separate expansion tank and they are dirt cheap new. Worked well with a 750 Honda but not sure how it will cope with the 1200 ZX12R. will let you know when I eventually get to New Zealand, build a new frame and fit it, ha.
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    Re: radiator stock or aftermarket
    #8
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    What bike motor runs at 125 all day long???
    And fan comes on at 120ish? Don't you mean 220?
    And if so all day long at 225 is hot!
    You need a larger radiator than the stock bike radiator.
    If you don't do this you WILL be running hot.
    ahh, you got me. yea, my bad, my excuse is I had a long day with excel and numbers were starting to blur . Allow me to correct myself, runs @ 185. sensors turn fans on at 220.
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    Re: radiator stock or aftermarket
    #9
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    And again, the setup that came with the buggy when i bought it is def something i wouldnt have done if i had built it myself. Like everyone's said, if your doin it definitely go aftermarket.
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    Re: radiator stock or aftermarket
    #10
    Millenium Member RickS.'s Avatar
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    On my first buggy I used the stock CBR 954 radiator.
    It probably ran at around 185 too. As long as I was crusing along in 5th or 6th gear. But the minute I'd get into the tighter stuff, where you had to slow down and shift a lot, the temps would climb. Never saw it get hotter than 220 or so, but it seemed I was always having to watch it.
    Now I run a 2 core Civic radiator with 10" fan and shroud.
    I also run a 9 row oil cooler on the front side of the radiator.
    And this is all up high in descent air flow. Fan never comes on until you stop and idle after running hard.
    Even the bikes do this, as these motors are not meant to idle for long.
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