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DT125R FORUM

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  4. So Close!...

So Close!...

Scheduled Pinned Locked Moved DTR
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  • S SpookDog
    6 May 2022, 19:14

    After I took the top end off I managed to break a head stud off level with the barrel while removing them to clean/lap the barrel! FML, eh?! I get all the luck it seems.
    So I put the 3MBp00 barrel, piston & head on that I brought recently. Just for the time being. When I first rode it I thought I’d broke the power valve servo wires or such. It was so lacking the usual low down torque. Once I’d established that the servo was working I took it for a ride, it took me a while to get used to the bike feeling so very different, but man that 1mm difference rocks! It really makes the power band noticeable! 😁

    I need to take some pics of the 3mb head, piston and gasket that I took off. Once I get camera working!

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    theportingmaster
    wrote on 7 May 2022, 12:20 last edited by
    #139

    @SpookDog Your previous barrel must of been worn out and lack
    of power if think 3MB00P has more power as so mildly ported, the
    P stamped parts had slighty more power as had different carbs etc. The P stamped head is standard 3MB head just without the casting numbers on top..

    C S 2 Replies Last reply 7 May 2022, 13:18
    1
    • T theportingmaster
      7 May 2022, 12:20

      @SpookDog Your previous barrel must of been worn out and lack
      of power if think 3MB00P has more power as so mildly ported, the
      P stamped parts had slighty more power as had different carbs etc. The P stamped head is standard 3MB head just without the casting numbers on top..

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      Calum
      wrote on 7 May 2022, 13:18 last edited by
      #140

      @theportingmaster I personally didn't like the P barrel. It might have been great on the TZR, but for the DTR it didn't suit the riding position/style.

      I will still keep it to one side nevertheless.

      Always Originate, Never Pirate!

      1 Reply Last reply
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      • T theportingmaster
        7 May 2022, 12:20

        @SpookDog Your previous barrel must of been worn out and lack
        of power if think 3MB00P has more power as so mildly ported, the
        P stamped parts had slighty more power as had different carbs etc. The P stamped head is standard 3MB head just without the casting numbers on top..

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        SpookDog
        wrote on 7 May 2022, 14:43 last edited by
        #141

        @theportingmaster

        I wouldn’t mean to say power per se, it’s more the way it comes on. It just feels like a totally different animal. It reminds me of an old rd125lc I rode years ago. My old barrel had loads of usable torque in comparison...

        C 1 Reply Last reply 7 May 2022, 14:47
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        • S SpookDog
          7 May 2022, 14:43

          @theportingmaster

          I wouldn’t mean to say power per se, it’s more the way it comes on. It just feels like a totally different animal. It reminds me of an old rd125lc I rode years ago. My old barrel had loads of usable torque in comparison...

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          Calum
          wrote on 7 May 2022, 14:47 last edited by
          #142

          @SpookDog I felt it shifted the power which would be useful tucked in behind a wind shield and what not, but my DT is a town/city rider and doesn't go faster than ~60mph 🤣

          When I got it 12 years ago the clocks read out 85MPH. So all those "mods" I've done have made it a lot slower lol.

          Always Originate, Never Pirate!

          S 1 Reply Last reply 18 May 2022, 18:00
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          • C Calum
            7 May 2022, 14:47

            @SpookDog I felt it shifted the power which would be useful tucked in behind a wind shield and what not, but my DT is a town/city rider and doesn't go faster than ~60mph 🤣

            When I got it 12 years ago the clocks read out 85MPH. So all those "mods" I've done have made it a lot slower lol.

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            SpookDog
            wrote on 18 May 2022, 18:00 last edited by
            #143

            Head gasket blown again! Second time in two months. I’ve had problems with 3 different barrel and head combinations. The only common factor is me and the antifreeze/coolant I’ve used. I’m gonna guess it’s not the coolant 🙄

            Weird thing is every single time it’s failed on the top/head side of the gasket. Between the head and gasket surfaces. Never between the gasket and the barrel...

            This is the first time this combo has failed (3mbP head & barrel) and I never removed the studs to clean the top of the barrel (because I had a stud shear off on my last barrel) It’ll be interesting to see which side of the gasket failed this time...

            C 1 Reply Last reply 18 May 2022, 18:03
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            • S SpookDog
              18 May 2022, 18:00

              Head gasket blown again! Second time in two months. I’ve had problems with 3 different barrel and head combinations. The only common factor is me and the antifreeze/coolant I’ve used. I’m gonna guess it’s not the coolant 🙄

              Weird thing is every single time it’s failed on the top/head side of the gasket. Between the head and gasket surfaces. Never between the gasket and the barrel...

              This is the first time this combo has failed (3mbP head & barrel) and I never removed the studs to clean the top of the barrel (because I had a stud shear off on my last barrel) It’ll be interesting to see which side of the gasket failed this time...

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              Calum
              wrote on 18 May 2022, 18:03 last edited by Calum
              #144

              @SpookDog And it's definitely the head that's causing the problem and not some other underlying problem.

              For example, I am merely hypothesising here, what if the coolant expansion spring on the radiator cap has failed and the coolant is expanding, adding pressure to the coolant system and eventually so much so that the only place the coolant can go is through the gasket?

              This is really not a hard job and I simply can't see you doing anything wrong here (other than putting the gasket on the wrong way up).

              Always Originate, Never Pirate!

              D 1 Reply Last reply 18 May 2022, 18:27
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              • C Calum
                18 May 2022, 18:03

                @SpookDog And it's definitely the head that's causing the problem and not some other underlying problem.

                For example, I am merely hypothesising here, what if the coolant expansion spring on the radiator cap has failed and the coolant is expanding, adding pressure to the coolant system and eventually so much so that the only place the coolant can go is through the gasket?

                This is really not a hard job and I simply can't see you doing anything wrong here (other than putting the gasket on the wrong way up).

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                DTR+NSR
                wrote on 18 May 2022, 18:27 last edited by
                #145

                Agree with Calum, you really can't be this un lucky with head gaskets. My own dt had head gasket symptoms, pushing water out the expansion bottle. Turned out to be a slight bit of damage on the radiator filler. Where the cap seal, seals against. It was just allowing water past as the coolant expanded as it warmed up. Also coolant will boil at a lower temperature, if isn't under pressure. I say it's well worth looking at this from a different angle.

                B 1 Reply Last reply 22 May 2022, 20:24
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                • D DTR+NSR
                  18 May 2022, 18:27

                  Agree with Calum, you really can't be this un lucky with head gaskets. My own dt had head gasket symptoms, pushing water out the expansion bottle. Turned out to be a slight bit of damage on the radiator filler. Where the cap seal, seals against. It was just allowing water past as the coolant expanded as it warmed up. Also coolant will boil at a lower temperature, if isn't under pressure. I say it's well worth looking at this from a different angle.

                  B Offline
                  B Offline
                  biohazard13
                  wrote on 22 May 2022, 20:24 last edited by biohazard13
                  #146

                  Hi. I cant seem to access my account...
                  I can't get to the change password option either...
                  Is this a problem with me or the site?...

                  SpookDog...

                  declanD 1 Reply Last reply 23 May 2022, 08:51
                  0
                  • B biohazard13
                    22 May 2022, 20:24

                    Hi. I cant seem to access my account...
                    I can't get to the change password option either...
                    Is this a problem with me or the site?...

                    SpookDog...

                    declanD Offline
                    declanD Offline
                    declan
                    wrote on 23 May 2022, 08:51 last edited by
                    #147

                    @biohazard13 I've been having major problems with site not working for a few days so maybe

                    C 1 Reply Last reply 23 May 2022, 09:57
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                    • declanD declan
                      23 May 2022, 08:51

                      @biohazard13 I've been having major problems with site not working for a few days so maybe

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                      Calum
                      wrote on 23 May 2022, 09:57 last edited by
                      #148

                      @declan It's not not working, the IP address changed so I had to reconfigure the DNS entry, then that takes time to replicate across DNS and then your computer has to refresh the entry etc.

                      That said, I only changed the DNS entry last night. Was still up though, if you knew where to find it.

                      Always Originate, Never Pirate!

                      B 1 Reply Last reply 8 Jun 2022, 19:34
                      1
                      • C Calum
                        23 May 2022, 09:57

                        @declan It's not not working, the IP address changed so I had to reconfigure the DNS entry, then that takes time to replicate across DNS and then your computer has to refresh the entry etc.

                        That said, I only changed the DNS entry last night. Was still up though, if you knew where to find it.

                        B Offline
                        B Offline
                        biohazard13
                        wrote on 8 Jun 2022, 19:34 last edited by
                        #149

                        @Calum Hey bud, why cant i use my spookdog account? I cant do a password retreval. Can you sign me in so i can use my spookdog account on my iphone?...

                        C S 2 Replies Last reply 9 Jun 2022, 07:13
                        0
                        • B biohazard13
                          8 Jun 2022, 19:34

                          @Calum Hey bud, why cant i use my spookdog account? I cant do a password retreval. Can you sign me in so i can use my spookdog account on my iphone?...

                          C Offline
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                          Calum
                          wrote on 9 Jun 2022, 07:13 last edited by
                          #150

                          @biohazard13 I sent you a private message a few weeks ago. Check your private messages.

                          Always Originate, Never Pirate!

                          1 Reply Last reply
                          0
                          • B biohazard13
                            8 Jun 2022, 19:34

                            @Calum Hey bud, why cant i use my spookdog account? I cant do a password retreval. Can you sign me in so i can use my spookdog account on my iphone?...

                            S Offline
                            S Offline
                            SpookDog
                            wrote on 25 Jun 2022, 16:11 last edited by
                            #151

                            Hey peeps! Nice to be back and posting in my own skin!...

                            Since the 3mbP barrel & head failed its head gasket I put the old 3mb back on. I had to get a Heli coil put in as one of the head studs snapped off level with the barrel. Unfortunately the bike shop put it in wonky 🙄 I had to drill out the corresponding hole in the head to allow it to seat properly over all 5 studs.

                            I should of opened them all up by 1mm!

                            Unfortunately it was just a bit too tight against the other studs. So over a short time, heat expansion must of lifted the back of the head ‘up onto the rear studs’ so, you guessed it! Another head gasket blown 🤪 3 weeks this time...

                            OMFL! ☠️

                            S 1 Reply Last reply 25 Jun 2022, 16:15
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                            • S SpookDog
                              25 Jun 2022, 16:11

                              Hey peeps! Nice to be back and posting in my own skin!...

                              Since the 3mbP barrel & head failed its head gasket I put the old 3mb back on. I had to get a Heli coil put in as one of the head studs snapped off level with the barrel. Unfortunately the bike shop put it in wonky 🙄 I had to drill out the corresponding hole in the head to allow it to seat properly over all 5 studs.

                              I should of opened them all up by 1mm!

                              Unfortunately it was just a bit too tight against the other studs. So over a short time, heat expansion must of lifted the back of the head ‘up onto the rear studs’ so, you guessed it! Another head gasket blown 🤪 3 weeks this time...

                              OMFL! ☠️

                              S Offline
                              S Offline
                              SpookDog
                              wrote on 25 Jun 2022, 16:15 last edited by
                              #152

                              Does everyone who has changed their own gasket fit them with no sealant added? I am actually thinking of buying a spray sealant to use with the new gasket I use next...

                              M 1 Reply Last reply 25 Jun 2022, 17:42
                              0
                              • S SpookDog
                                25 Jun 2022, 16:15

                                Does everyone who has changed their own gasket fit them with no sealant added? I am actually thinking of buying a spray sealant to use with the new gasket I use next...

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                                mhbikesnbits
                                wrote on 25 Jun 2022, 17:42 last edited by
                                #153

                                @SpookDog I haven’t added any sealer on mine shouldn’t really need it as it should be a compression squeeze, but I’ll see how I get on when it’s running probably a stupid question asking have you put the gasket the correct way up

                                S 1 Reply Last reply 25 Jun 2022, 18:28
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                                • M mhbikesnbits
                                  25 Jun 2022, 17:42

                                  @SpookDog I haven’t added any sealer on mine shouldn’t really need it as it should be a compression squeeze, but I’ll see how I get on when it’s running probably a stupid question asking have you put the gasket the correct way up

                                  S Offline
                                  S Offline
                                  SpookDog
                                  wrote on 25 Jun 2022, 18:28 last edited by SpookDog
                                  #154

                                  @mhbikesnbits

                                  Not a stupid question. Yep, gasket is UP, not 9U 🙂

                                  I actually thought that the coolant I was using was softening the black gasket coating and allowing leaks, but I’ve tried just pure H2o with no change...

                                  Only difference was that this time the gasket failed at the bottom, barrel side. It has always failed at the top between the gasket and the head before...

                                  I’m gonna try the studs hand tight this time as well. Just so everything can expand & contract evenly...

                                  I’m also thinking of contacting an excorcist ☠️

                                  C 1 Reply Last reply 25 Jun 2022, 18:47
                                  0
                                  • S SpookDog
                                    25 Jun 2022, 18:28

                                    @mhbikesnbits

                                    Not a stupid question. Yep, gasket is UP, not 9U 🙂

                                    I actually thought that the coolant I was using was softening the black gasket coating and allowing leaks, but I’ve tried just pure H2o with no change...

                                    Only difference was that this time the gasket failed at the bottom, barrel side. It has always failed at the top between the gasket and the head before...

                                    I’m gonna try the studs hand tight this time as well. Just so everything can expand & contract evenly...

                                    I’m also thinking of contacting an excorcist ☠️

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                                    C Offline
                                    Calum
                                    wrote on 25 Jun 2022, 18:47 last edited by
                                    #155

                                    @SpookDog This is fucking mental!!!!!!

                                    Seriously what the hell is going on? Where abouts do you live? I'm half tempted to drive round and do this myself! There is no way you should be having this much trouble with the head gasket. How have you not given up by now!

                                    I don't understand 😮

                                    There HAS to be some underlying issue here we aren't seeing.

                                    Maybe there is a crack in the bottom end, where the coolant chambers meet. This would cause pressure into the engine and potentially blow a gasket. My only problem with that theory is that it'll induce black two stroke into the coolant system.

                                    Always Originate, Never Pirate!

                                    S 1 Reply Last reply 25 Jun 2022, 20:01
                                    0
                                    • C Calum
                                      25 Jun 2022, 18:47

                                      @SpookDog This is fucking mental!!!!!!

                                      Seriously what the hell is going on? Where abouts do you live? I'm half tempted to drive round and do this myself! There is no way you should be having this much trouble with the head gasket. How have you not given up by now!

                                      I don't understand 😮

                                      There HAS to be some underlying issue here we aren't seeing.

                                      Maybe there is a crack in the bottom end, where the coolant chambers meet. This would cause pressure into the engine and potentially blow a gasket. My only problem with that theory is that it'll induce black two stroke into the coolant system.

                                      S Offline
                                      S Offline
                                      SpookDog
                                      wrote on 25 Jun 2022, 20:01 last edited by
                                      #156

                                      @Calum

                                      Bud, it is so beyond being real, you couldn’t make this shit up! I’m just so stubborn I won’t give up. I just wish I could believe I’m doing something obviously wrong. Or afford to take it to a shop and let them keep mending it if it goes again!...

                                      Next time I’ll take detailed pics and post all that I’m doing. It’s just so fuckin exhausting!! 😐 I’ll get there eventually tho...

                                      C 1 Reply Last reply 25 Jun 2022, 20:11
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                                      • S SpookDog
                                        25 Jun 2022, 20:01

                                        @Calum

                                        Bud, it is so beyond being real, you couldn’t make this shit up! I’m just so stubborn I won’t give up. I just wish I could believe I’m doing something obviously wrong. Or afford to take it to a shop and let them keep mending it if it goes again!...

                                        Next time I’ll take detailed pics and post all that I’m doing. It’s just so fuckin exhausting!! 😐 I’ll get there eventually tho...

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                                        Calum
                                        wrote on 25 Jun 2022, 20:11 last edited by
                                        #157

                                        @SpookDog I'd seriously be contemplating that engine. Something must be amiss.

                                        Always Originate, Never Pirate!

                                        S 1 Reply Last reply 25 Jun 2022, 20:18
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                                        • C Calum
                                          25 Jun 2022, 20:11

                                          @SpookDog I'd seriously be contemplating that engine. Something must be amiss.

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                                          S Offline
                                          SpookDog
                                          wrote on 25 Jun 2022, 20:18 last edited by
                                          #158

                                          @Calum

                                          Yeah. I just can’t imagine how the bottom end could affect the head seal. I thought it might be the budget price eBay Athena gaskets at one point. Changed to Vertex with same results. I’ve tried 3 different barrel & head combinations. I’m the only constant factor 😟

                                          C 1 Reply Last reply 25 Jun 2022, 20:38
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