Home Forums Tech Talk Radiator cap?

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    • #21169
      John Sweeney

      New here, new to karts.  I recently came into a cr80 birel kart that needs some love.

      I’m pretty mechanically inclined, I’ve been taking my cars and dirtbike apart for a while, but I don’t have too much experience with radiator caps (aside from taking them off and putting them back on).

      My radiator cap is missing. For reference, I tried to fit the cap from my kx250 on there, no dice, from my lexus, too big, honda, too big. Went to the local motorcycle and 4wheeler store here and they can only look up parts by vehicle. Looked online, and since radiator caps are $20-30 I didn’t want to just order a few and see what fit.

      It is an all black radiator, nothing fancy. I’ll try and post some pics. I took some measurements. Inner diameter2 is taken at the point where the overflow tube hits the bowl.

      Inner diameter: 27mm

      Inner diameter2: 25.5mm

      Outer diameter: 44.75mm

      Bowl depth: 16mm


    • #21175
      tony zambos


      Start with going to a kart shop. If you can, bring the radiator with you.  The caps are pressurized with a fitting for an overflow line

      LAD Specialties customer / tony kart / rotax / kt100

    • #21176
      John Sweeney

      Thanks for the advice, I think he closest kart shop is a few hours away so I may be out of luck for a bit. If anyone has any other advice, I’d be glad to hear it. Maybe I can call a shop and get them to find me a cap long distance.

    • #21192
      Sanford Mitz

      My guess is Freeline. Check with a Birel dealer.

    • #21201
      Brian Degulis

      Try these guys with measurments   http://www.spikeradiators.com/



    • #21970
      Troy V Smith

      Looks like a large Freeline to me as well – it has the welded brackets in the back?


      We may not be the fastest on the track...but we're having the most fun!

    • #21974
      John Sweeney

      Awesome! Thanks guys, I just got off the phone with Ryen at Cambrian go karts and that’s what he said. One is one the way. I’ll post results.

    • #21170
      John Sweeney
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