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  4. Bike seems to leak coolant from kickstand ??

Bike seems to leak coolant from kickstand ??

Scheduled Pinned Locked Moved Engine
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  • mbmO8M mbmO8

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

    S Offline
    S Offline
    SpookDog
    wrote on 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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    • mbmO8M Offline
      mbmO8M Offline
      mbmO8
      wrote last edited by
      #17

      I replaced the head gasket and got the head machined flat and that was all good … for about 500 miles . Now it’s started doing it again but this time the temps arnt shooting up

      CalumC 1 Reply Last reply
      0
      • mbmO8M mbmO8

        I replaced the head gasket and got the head machined flat and that was all good … for about 500 miles . Now it’s started doing it again but this time the temps arnt shooting up

        CalumC Online
        CalumC Online
        Calum
        wrote last edited by
        #18

        @mbmO8 Just checking, you used a genuine/Athena/Vertex head gasket? Not a knock off. And the head gasket was installed the right way up?

        Always Originate, Never Pirate!

        1 Reply Last reply
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        • mbmO8M Offline
          mbmO8M Offline
          mbmO8
          wrote last edited by
          #19

          Yep right way up and Athena from PJME.co.uk

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          1
          • CalumC Online
            CalumC Online
            Calum
            wrote last edited by
            #20

            Did you torque the head up in a star pattern evenly?

            Did you retorque after a few heat cycles?

            You're running standard barrel yes, as the Athena kits need o rings for the spark plugs.

            Always Originate, Never Pirate!

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            • mbmO8M Offline
              mbmO8M Offline
              mbmO8
              wrote last edited by
              #21

              Standard barrel and derestricted but factory head and I torqued them to the best of my ability due to the tight space some of the bolts are in

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              • CalumC Online
                CalumC Online
                Calum
                wrote last edited by
                #22

                Yeah it's a nightmare trying to get the torque wrench in, can help to drop the front engine mount bolt gives you a bit of wiggle room.

                Just go over the bolts and make sure none of them have rattled loose again.

                Often these things come from a very simple place. So just double/triple check all coolant hoses/unions etc.

                Always Originate, Never Pirate!

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                • mbmO8M Offline
                  mbmO8M Offline
                  mbmO8
                  wrote last edited by
                  #23

                  I had a spare head gasket from the gasket set I got from yambits I know it’s not Athena but I’ll order one up and it’s on now and seaming to be fine thank you lot

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                  • mbmO8M Offline
                    mbmO8M Offline
                    mbmO8
                    wrote last edited by
                    #24

                    And that didn’t last long …

                    The gasket has started leaking already after maybe 80 miles. Going to order an Athena one later tonight and I was wondering if it would be worth skimming my head and barrel mating surfaces?

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                    • CalumC Online
                      CalumC Online
                      Calum
                      wrote last edited by
                      #25

                      Yeah, I've never had any luck with the pattern ones.

                      Always Originate, Never Pirate!

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                      0
                      • mbmO8M Offline
                        mbmO8M Offline
                        mbmO8
                        wrote last edited by
                        #26

                        Is that not too uncommon for them to go that soon? As I’m starting to worry it could be something else causing them to fail so often

                        1 Reply Last reply
                        0
                        • CalumC Online
                          CalumC Online
                          Calum
                          wrote last edited by
                          #27

                          Only use Athena, Genuine or Vertex head gaskets. The white ones blow straight away.

                          Always Originate, Never Pirate!

                          1 Reply Last reply
                          0
                          • mbmO8M Offline
                            mbmO8M Offline
                            mbmO8
                            wrote last edited by
                            #28

                            It was a black/gray one from a top end kit from yambits but even when I installed it it didn’t leak coolent but didn’t hold compression

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                            0
                            • R Offline
                              R Offline
                              Rallyfinnen
                              wrote last edited by
                              #29

                              I suspect the head or top of cylinder is not flat if you're having issues again and again. I would take cylinder and head to a machine shop or do it yourself if you have the equipment.

                              1 Reply Last reply
                              0
                              • mbmO8M Offline
                                mbmO8M Offline
                                mbmO8
                                wrote last edited by
                                #30

                                I think that will be the plan for now. I’ll get the barrel off and order new studs and I will check the reeds too

                                1 Reply Last reply
                                0
                                • S Offline
                                  S Offline
                                  SpookDog
                                  wrote last edited by SpookDog
                                  #31

                                  Have you lowered the coolant level in the expansion tank to the centre marking.

                                  Also try measuring the head stud length that is protruding. Then again between the barrel top and washer with the dome nuts screwed down.

                                  I’ve got the same problem with gaskets blowing. In my case it’s getting sucked into the chamber causing white - grey smoke.
                                  Trouble is i don’t trust the local mom&pop engineer firms. The last job was a re honing shit show.
                                  PJME skim heads?

                                  S 1 Reply Last reply
                                  0
                                  • S SpookDog

                                    Have you lowered the coolant level in the expansion tank to the centre marking.

                                    Also try measuring the head stud length that is protruding. Then again between the barrel top and washer with the dome nuts screwed down.

                                    I’ve got the same problem with gaskets blowing. In my case it’s getting sucked into the chamber causing white - grey smoke.
                                    Trouble is i don’t trust the local mom&pop engineer firms. The last job was a re honing shit show.
                                    PJME skim heads?

                                    S Offline
                                    S Offline
                                    SpookDog
                                    wrote last edited by SpookDog
                                    #32

                                    PS Same issue, bottom of gasket is dry and the top has oily wet channels…

                                    1 Reply Last reply
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