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  4. Bike seems to leak coolant from kickstand ??

Bike seems to leak coolant from kickstand ??

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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #6

    Good, sounds like you've ruled out those two main issues, so it'll be something simple. Radiator cap is a usual suspect.

    Always Originate, Never Pirate!

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    • mbmO8M Offline
      mbmO8M Offline
      mbmO8
      wrote on last edited by
      #7

      I’ve tried another cap ( an old one that came with the bike as the bike came with 2 boxes of parts) and it seams to be worse so I think that shows both caps are bad and the og one wasn’t as bad

      Thank you very much

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      • mbmO8M Offline
        mbmO8M Offline
        mbmO8
        wrote last edited by Calum
        #8

        Hi again, so after trying a new cap it hasn’t seamed to fix it but I am 95% sure I found the source of the leak (see image ) is this hole ment to be used as an overflow and does anyone have a full Coolant system diagram

        alt text

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        • mbmO8M Offline
          mbmO8M Offline
          mbmO8
          wrote last edited by
          #9

          Update.

          so i have a reason to believe that its my water pump that has failed, does anyone know how to test the water pump before removing it ?

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          • CalumC Offline
            CalumC Offline
            Calum
            wrote last edited by
            #10

            Why would it be the waterpump? That's on the other side of the engine/bike. It's no where near the stand?

            Do you mean you think it's getting hot and overflowing because the waterpump doesn't work???

            Always Originate, Never Pirate!

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            • mbmO8M Offline
              mbmO8M Offline
              mbmO8
              wrote last edited by
              #11

              Been working on it all day and we have since found it wasn’t the water pump still trying to figure it out haha

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              • S Offline
                S Offline
                SpookDog
                wrote last edited by SpookDog
                #12

                Have you checked the thermostat?
                Is the coolant in the radiator staying at the same level, or are you constantly topping it up?
                The only reason for the expansion tank to be full and overflowing is if the head gasket has blown and is pressuring the coolant system, which results in loss of coolant through the expansion tank.

                P.S. yes the expansion tank is connected to that part of the frame by a small rubber tube. it lives up behind the side panel above the rear wheel. there's a min & max level about halfway up the tank. Check it out to see if it's full to the top...

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                • mbmO8M Offline
                  mbmO8M Offline
                  mbmO8
                  wrote last edited by
                  #13

                  @SpookDog would this not contaminate the coolant as I have never seen anything in the coolant and always drains perfectly clear

                  S 1 Reply Last reply
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                  • mbmO8M mbmO8

                    @SpookDog would this not contaminate the coolant as I have never seen anything in the coolant and always drains perfectly clear

                    S Offline
                    S Offline
                    SpookDog
                    wrote last edited by
                    #14

                    @mbmO8
                    Sorry for late reply.

                    It’s since you did the top end build I’m thinking about, not before.
                    It can take a while for sludge to build up.

                    Is it loosing coolant from the radiator? Check the level …

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                    • mbmO8M Offline
                      mbmO8M Offline
                      mbmO8
                      wrote last edited by
                      #15

                      Yes it’s loosing cooling from the radiator quite a bit

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                      • mbmO8M mbmO8

                        Yes it’s loosing cooling from the radiator quite a bit

                        S Offline
                        S Offline
                        SpookDog
                        wrote last edited by
                        #16

                        @mbmO8

                        Head’s still leaking bud. It’s probably best to replace the base/barrel gasket as well.
                        Myself, I remove the studs from the barrel an lap the top in with a square of plate glass and some 240-ish wet and dry sand paper. Then do the same with the cylinder head. Just to remove the crap.
                        Doing up the head nuts really needs a little 1/4 in drive torque wrench to get it right. I do it in three stages…

                        I know that it’s no consolation but I’ve just had to put a newly rebored barrel and head on and had to go through all the fuxin hassle of it myself 🫤 …

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