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DT125R FORUM

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  4. So Close!...

So Close!...

Scheduled Pinned Locked Moved DTR
1.1k Posts 26 Posters 238.4k Views
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  • S SpookDog

    Well, I couldn’t confirm the sizes, so I’m hoping that they’re right so I don’t have to Rip t Piss out of Hotshot!! 😜
    I’m just praying that the sleeves are in good enough order (especially the roller bearing one) to match up nicely 🤞 …

    S Offline
    S Offline
    SpookDog
    wrote last edited by SpookDog
    #1059

    Stopped riding for about six months cause of old git health problems, only just renewed my CBT again!
    Took me over a year to fit the new bearings and bushes into the rear suspension linkage! Didn’t realise how big of a faff it was going to be to get them pressed in straight and to the depth that’s needed for the seals! Done though. Nice and tight on the ass end! No more ‘snatchy chain’ feel when pulling away 🙂

    Is HotShot still around? I need some info on wheel builders in Dorset. I can’t find the old post recommending a particular one. My back wheel is a bit up and down, as well as being a bit side to side…

    Unless anyone has a decent straight rear wheel for sale?…
    Ta!…

    HOTSHOT IIIH 1 Reply Last reply
    3
    • CalumC Offline
      CalumC Offline
      Calum
      wrote last edited by
      #1060

      Oh hey blast from the past!

      Yeah @HOTSHOT-III is still knocking about.

      Sorry to hear about your health problems, considering how much you use your DT that's a crying shame.

      Always Originate, Never Pirate!

      1 Reply Last reply
      1
      • S SpookDog

        Stopped riding for about six months cause of old git health problems, only just renewed my CBT again!
        Took me over a year to fit the new bearings and bushes into the rear suspension linkage! Didn’t realise how big of a faff it was going to be to get them pressed in straight and to the depth that’s needed for the seals! Done though. Nice and tight on the ass end! No more ‘snatchy chain’ feel when pulling away 🙂

        Is HotShot still around? I need some info on wheel builders in Dorset. I can’t find the old post recommending a particular one. My back wheel is a bit up and down, as well as being a bit side to side…

        Unless anyone has a decent straight rear wheel for sale?…
        Ta!…

        HOTSHOT IIIH Offline
        HOTSHOT IIIH Offline
        HOTSHOT III
        wrote last edited by
        #1061

        @SpookDog Hey bud, hope you're feeling better. I did wonder what had happened to you.

        Good to hear you've sorted the rear suspension 👍

        Try Salisbury Wheel Builders over in Ringwood: https://salisbury-wheel-builders.ueniweb.com/ 01202 081994

        S 1 Reply Last reply
        0
        • HOTSHOT IIIH HOTSHOT III

          @SpookDog Hey bud, hope you're feeling better. I did wonder what had happened to you.

          Good to hear you've sorted the rear suspension 👍

          Try Salisbury Wheel Builders over in Ringwood: https://salisbury-wheel-builders.ueniweb.com/ 01202 081994

          S Offline
          S Offline
          SpookDog
          wrote last edited by SpookDog
          #1062

          alt text

          Still going well mechanically, just looks like a dog 🐾

          Cheers for the link bud!…

          I really need some hubs if anyone knows of any for sale? Back one is way more urgent than the front!

          Only issue is it seems to be running a bit hot. I removed the plastic cover from the radiator and it was an improvement, but not great. I’m wondering if being stood up and hardly ridden since last winter has let the radiator clog up? The radiator was well hot when I checked it. Like it’s not shedding the heat. The ‘fins’ look clear, so I’m wondering if it’s an internal obstruction?

          HOTSHOT IIIH 1 Reply Last reply
          1
          • CalumC Offline
            CalumC Offline
            Calum
            wrote last edited by
            #1063

            It's looking smart with that pipe on it.

            The usual suspect for running hot can be the thermostat.

            I must admit, DTs always seem to run hot, I tried all sorts (including twin radiators) and the solution for me was to remove the thermostat.

            This is really not ideal as the thermostat is an integral part of the engines cooling, it applies pressure to the cylinder head and prevents hot spots from forming.

            But I found the DT was just running too hot and would benefit from a lower temperature thermostat (especially if tuned).

            But as they say Mr Yamaha know what they're doing and it's a tried and tested machine ❤

            Always Originate, Never Pirate!

            1 Reply Last reply
            0
            • S SpookDog

              alt text

              Still going well mechanically, just looks like a dog 🐾

              Cheers for the link bud!…

              I really need some hubs if anyone knows of any for sale? Back one is way more urgent than the front!

              Only issue is it seems to be running a bit hot. I removed the plastic cover from the radiator and it was an improvement, but not great. I’m wondering if being stood up and hardly ridden since last winter has let the radiator clog up? The radiator was well hot when I checked it. Like it’s not shedding the heat. The ‘fins’ look clear, so I’m wondering if it’s an internal obstruction?

              HOTSHOT IIIH Offline
              HOTSHOT IIIH Offline
              HOTSHOT III
              wrote last edited by HOTSHOT III
              #1064

              @SpookDog Thermostat definitely worth a look as @Calum said. Also the rad could have a blockage, it's not unheard of. I've had some success on cars blocking off the ends, filling them half full of Gunk/Jizer and giving them a good shake before rinsing with a garden hose. I like doing this on the outside of radiators as well, get loads of degreaser in the fins and it's amazing how much crap you can hose out. And I'd still take a look at the fins particulalrly on the back of the rad as they're prone to being folded over by people doing plug changes etc. which can considerably reduce flow through them. It can be quite relaxing to take a thin screwdriver and straighten every single fin and this can make DTRs run a bit cooler.

              Also have you taken a look at the waterpump? Being a plastic impeller moulded onto a steel shaft it's possible this could have separated meaning it's no longer making the coolant circulate. TBH I've never known this to happen on the DTR but worth checking on a high mileage bike.

              @OllieDTR Has Liam got any wheels for sale? Would be a fairly local solution...

              S 1 Reply Last reply
              2
              • HOTSHOT IIIH HOTSHOT III

                @SpookDog Thermostat definitely worth a look as @Calum said. Also the rad could have a blockage, it's not unheard of. I've had some success on cars blocking off the ends, filling them half full of Gunk/Jizer and giving them a good shake before rinsing with a garden hose. I like doing this on the outside of radiators as well, get loads of degreaser in the fins and it's amazing how much crap you can hose out. And I'd still take a look at the fins particulalrly on the back of the rad as they're prone to being folded over by people doing plug changes etc. which can considerably reduce flow through them. It can be quite relaxing to take a thin screwdriver and straighten every single fin and this can make DTRs run a bit cooler.

                Also have you taken a look at the waterpump? Being a plastic impeller moulded onto a steel shaft it's possible this could have separated meaning it's no longer making the coolant circulate. TBH I've never known this to happen on the DTR but worth checking on a high mileage bike.

                @OllieDTR Has Liam got any wheels for sale? Would be a fairly local solution...

                S Offline
                S Offline
                SpookDog
                wrote last edited by
                #1065

                Cheers guys!...

                I've got a half decent rad i bought a while back. alot better than the used stuff you normally see on fleabay. i'm gonna flush that and leak test it, as well as checking for decent flowrate. Ill order a new thermostat and do them both together...

                Has anyone looked at the replacement rads on fleabay? there's a chinese one for £90 and a chek one for £114. i'm leaning towards the chinese one just because the quality of the TIG weld looks to a much better standard.

                1 Reply Last reply
                0
                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote last edited by
                  #1066

                  I've never had any luck with the Chinese ones winner racing. I say that but the ones I bought for my ETX were from them and they actually fit, sort of.

                  But I have bought numerous previous one to no avail.

                  Always Originate, Never Pirate!

                  S 1 Reply Last reply
                  0
                  • CalumC Calum

                    I've never had any luck with the Chinese ones winner racing. I say that but the ones I bought for my ETX were from them and they actually fit, sort of.

                    But I have bought numerous previous one to no avail.

                    S Offline
                    S Offline
                    SpookDog
                    wrote last edited by SpookDog
                    #1067

                    @Calum

                    It’s a shame that they’re shite, because I think the radiator is the main problem. If it was the thermostat I’d of thought that it would overheat from the start, but it keeps cool enough for a while depending on how hot it is and how slow I’m going (less air flow over the radiator). The radiator is well hot to the touch!

                    I’m waiting on a new stat and gasket from PJME and I’m going to flush the radiator that’s on the bike with a hose in the meantime. The fins on the back are better than my other radiator, which is originally pristine in every way apart from the rear fins being the worst I’ve personally seen

                    S 1 Reply Last reply
                    0
                    • S SpookDog

                      @Calum

                      It’s a shame that they’re shite, because I think the radiator is the main problem. If it was the thermostat I’d of thought that it would overheat from the start, but it keeps cool enough for a while depending on how hot it is and how slow I’m going (less air flow over the radiator). The radiator is well hot to the touch!

                      I’m waiting on a new stat and gasket from PJME and I’m going to flush the radiator that’s on the bike with a hose in the meantime. The fins on the back are better than my other radiator, which is originally pristine in every way apart from the rear fins being the worst I’ve personally seen

                      S Offline
                      S Offline
                      SpookDog
                      wrote last edited by
                      #1068

                      Any decent fan kits to mount to the radiator? Adjustable thermo activated switch, shrouded to pull air through from the rear of the radiator?…

                      I’ve got some work to do first, there was oil scum in the radiator and I guess all the way through the thermostat, pump and system. (I’m wondering if the stat is all gummed up) The pump rotor and seals were replaced when I rebuilt the bottom end…

                      It’s not the head gasket blowing though, it’s not pushing coolant into the expansion tank or noticeably lowering the level in the radiator.
                      I had problems with a slight step in the casings at the rear of the barrel which I thought I had fixed. There’s a ‘wet line’ between the barrel and inlet manifold that seems to support my theory.

                      I’m waiting on a new genuine base gasket, thermostat and some Loctite VHT copper RTV sealant, as well as the thermostat and gasket…

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