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DT125R FORUM

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  4. What damage have I done?

What damage have I done?

Scheduled Pinned Locked Moved Engine
38 Posts 2 Posters 21.5k Views 1 Watching
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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #19

    Yeah, get it to a shop and ask if you will be fine with a hone. In my experience you don't tend to save much money by buying the piston yourself.

    I mean sure, if you can get the piston cheaper then by all means. But the risk of buying the wrong one could outweigh the savings you might make.

    Always Originate, Never Pirate!

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    0
    • M Offline
      M Offline
      Matt47
      wrote on last edited by Matt47
      #20

      OK so not much progress since last post, but I have now at least removed engine from the frame...

      Still not made it to a shop to check cylinder, but have ordered a flywheel puller and made up a holding tool for clutch/flywheel which I'm chuffed with!

      All prepped and ready to operate after a good clean. B-)

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      • CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #21

        Nice, keep us posted. Any problems throw up a thread. ☺

        Always Originate, Never Pirate!

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        0
        • M Offline
          M Offline
          Matt47
          wrote on last edited by
          #22

          Well I finally got myself organised and have everything ready for the rebuild 7 months later! :-S

          Crank has been rebuilt (not by me!), barrel/head skimmed, powervalve cleaned, got full seal kit and full Athena gasket kit ready to go... Now I just need to remember where everything goes. :-))

          CalumC 1 Reply Last reply
          1
          • M Matt47

            Well I finally got myself organised and have everything ready for the rebuild 7 months later! :-S

            Crank has been rebuilt (not by me!), barrel/head skimmed, powervalve cleaned, got full seal kit and full Athena gasket kit ready to go... Now I just need to remember where everything goes. :-))

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #23

            @Matt47 it's fairly straight forward but do shout if you need help.

            Always Originate, Never Pirate!

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            • M Offline
              M Offline
              Matt47
              wrote on last edited by
              #24

              Ok, so my next silly question is... How do I remove seals the correct way to avoid damaging anything?!
              Think I have read that you can use screws to give yourself something to pull on - is this correct? Not keen on digging them out with a flat-head (unless they pop out easily).

              You can probably tell I'm a bit nervous about the whole thing, guess I need to man up haha! 😛

              CalumC 1 Reply Last reply
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              • M Matt47

                Ok, so my next silly question is... How do I remove seals the correct way to avoid damaging anything?!
                Think I have read that you can use screws to give yourself something to pull on - is this correct? Not keen on digging them out with a flat-head (unless they pop out easily).

                You can probably tell I'm a bit nervous about the whole thing, guess I need to man up haha! 😛

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #25

                @Matt47 I always had access to the seals from behind. Aka if they are the main bearing seals then removing the main bearings will give you access to them.

                Always Originate, Never Pirate!

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                • M Offline
                  M Offline
                  Matt47
                  wrote on last edited by
                  #26

                  Ah, makes sense thanks!

                  There was me thinking I had everything on my rebuild list, and I forgot to get the other bearings...

                  All remaining bearings seem to be in great shape, but I guess I need to weigh up whether or not to do a full rebuild without all new bearings. Is it worth the risk?!

                  CalumC 1 Reply Last reply
                  0
                  • M Matt47

                    Ah, makes sense thanks!

                    There was me thinking I had everything on my rebuild list, and I forgot to get the other bearings...

                    All remaining bearings seem to be in great shape, but I guess I need to weigh up whether or not to do a full rebuild without all new bearings. Is it worth the risk?!

                    CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #27

                    @Matt47 What bearings need replacing?

                    The gearbox bearings cost 20 quid. It would be silly not to sort those out st that price.

                    If I were splitting the cases then I would just replace the bearings. But that's me.

                    Always Originate, Never Pirate!

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                    • M Offline
                      M Offline
                      Matt47
                      wrote on last edited by
                      #28

                      I only have the 2 main bearings for Crankshaft, and the top end stuff.

                      I'll have to commandeer the oven once my wife has gone to bed, and get them all out and have a proper look at them! They all feel/look in good nick but I might as well take them out anyway to make the seals easier to change.

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                      • CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #29

                        As said, for their cost I'd do the gearbox bearings.

                        Always Originate, Never Pirate!

                        1 Reply Last reply
                        0
                        • M Offline
                          M Offline
                          Matt47
                          wrote on last edited by
                          #30

                          Yeah I suppose so, especially after seeing the post on gearbox bearings (quarter of the price of what I can find in France - and that includes postage from UK).

                          Disappointed that I overlooked these when ordering, but it would annoy me more if I didn't do it right after it has sat in bits for 7 months plus!

                          Cheers for all your support mate, will hopefully get them ordered up soon.

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                          1
                          • CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by
                            #31

                            Simplybearings yeah? Grab all th Koyo bearings

                            Always Originate, Never Pirate!

                            1 Reply Last reply
                            0
                            • M Offline
                              M Offline
                              Matt47
                              wrote on last edited by
                              #32

                              Yeah, that's the one - amazing value once you know what to look for! €105 for 2 genuine Crank bearings or €28 for 2 koyo shielded (which were what mine were).

                              1 Reply Last reply
                              0
                              • M Offline
                                M Offline
                                Matt47
                                wrote on last edited by
                                #33

                                Tonight I heated up the crankcase halves to remove the bearings, and got all out apart from the 2 in the picture.

                                http://i1377.photobucket.com/albums/ah75/MatthewT47/20150124_144844_zpsnakligp9.jpg

                                How do I go about getting these out, as they are only accessible from one side?

                                Cheers, Matt

                                ps. sorry about the date on pic lol,

                                CalumC 1 Reply Last reply
                                0
                                • M Matt47

                                  Tonight I heated up the crankcase halves to remove the bearings, and got all out apart from the 2 in the picture.

                                  http://i1377.photobucket.com/albums/ah75/MatthewT47/20150124_144844_zpsnakligp9.jpg

                                  How do I go about getting these out, as they are only accessible from one side?

                                  Cheers, Matt

                                  ps. sorry about the date on pic lol,

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #34

                                  @Matt47 i lay the crankcase faced down. With enough heat the bearing simply dropped out into the oven.

                                  It was getting it back in which took a bit of skill.

                                  Always Originate, Never Pirate!

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                                  1
                                  • M Offline
                                    M Offline
                                    Matt47
                                    wrote on last edited by
                                    #35

                                    Ok cheers, will try again tonight. Obviously needs more cooking - gave it 30min at gas mark 1.

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                                    • M Offline
                                      M Offline
                                      Matt47
                                      wrote on last edited by
                                      #36

                                      So I tried again and no joy, then left it in almost an hour and the only thing that happened was I melted stuff unexpectedly... Guess i will have to take it somewhere to get it removed.
                                      Meanwhile, does anyone know what this and the other needle rollers are so I can get them ordered from simplybearings?

                                      CalumC 1 Reply Last reply
                                      0
                                      • M Matt47

                                        So I tried again and no joy, then left it in almost an hour and the only thing that happened was I melted stuff unexpectedly... Guess i will have to take it somewhere to get it removed.
                                        Meanwhile, does anyone know what this and the other needle rollers are so I can get them ordered from simplybearings?

                                        CalumC Offline
                                        CalumC Offline
                                        Calum
                                        wrote on last edited by
                                        #37

                                        @Matt47 should only need 10 or so minutes...looks like you will need a hydraulic puller. They can be had off eBay for 40 quid. Don't knoe how good those ones are though.

                                        Always Originate, Never Pirate!

                                        1 Reply Last reply
                                        0
                                        • M Offline
                                          M Offline
                                          Matt47
                                          wrote on last edited by
                                          #38

                                          Yeah a blind bearing set would be cool, but a decent one is big bucks - and it's not an everyday job for me! Cheap tools are great if they work but will probably get someone to do it rather than take the risk.

                                          I even tried a rawl anchor on a diy sliding hammer and this just broke one of the collet parts off the bolt rather than move the bearing - this thing is stuck solid!

                                          Bloody thing is driving me potty!!!

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