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DT125R FORUM

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  4. So Close!...

So Close!...

Scheduled Pinned Locked Moved DTR
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  • OllieDTRO OllieDTR

    Hi guys
    Off the top of your head what psi are you getting on compression test?
    Thank you!

    S Offline
    S Offline
    SpookDog
    wrote on last edited by SpookDog
    #650

    @OllieDTR

    Never done one on a two stroke bud. Why do you ask?…

    I gather it’s different if you have the power valve pinned open or not. I don’t think that there is a definitive standard to gauge a ‘normal’ from…

    1 Reply Last reply
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    • CalumC Online
      CalumC Online
      Calum
      wrote on last edited by
      #651

      I just got 140PSI on my Cagiva raptor. Did it on Sunday purely out of interest.

      But this engine is worn and I'm just in the middle of a rebuild as we speak.

      That said, 140PSI is good for a two smoke.

      Always Originate, Never Pirate!

      1 Reply Last reply
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      • OllieDTRO Offline
        OllieDTRO Offline
        OllieDTR
        wrote on last edited by
        #652

        Perfect thank you everyone

        1 Reply Last reply
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        • S SpookDog

          @Calum

          Yep, the 2T pump lower 4mm screw/bolt hole goes all the way through to the nylon cog on the inside…
          Plugged it with a screw/bolt…

          Oil & brakes? Who would of guessed? 😐 …

          S Offline
          S Offline
          SpookDog
          wrote on last edited by SpookDog
          #653

          Engines running sweetly, got the rear disc and calliper cleaned up, so have good brakes again. Only thing is that the right side indicators have stopped working along with the indicator dash light. Also got to wait for PJME to get the crank in stock. Always something on a 35 year old basket case, eh?
          Also got the new headstock bearing half way on and it won’t budge!…
          💀

          OllieDTRO HOTSHOT IIIH 2 Replies Last reply
          0
          • S SpookDog

            Engines running sweetly, got the rear disc and calliper cleaned up, so have good brakes again. Only thing is that the right side indicators have stopped working along with the indicator dash light. Also got to wait for PJME to get the crank in stock. Always something on a 35 year old basket case, eh?
            Also got the new headstock bearing half way on and it won’t budge!…
            💀

            OllieDTRO Offline
            OllieDTRO Offline
            OllieDTR
            wrote on last edited by
            #654

            @SpookDog

            With my bearing I put the headstock in the freezer to shrink it ever so slightly then heat the bearing up really bit to expand it, then quickly drop it on few taps with a rod on the inner race of the bearing all the way around and it seated lovely.
            First one I’ve done on dtr though I did one on a kx and the tolerances was so tight it didn’t work I had to get a tube that fit over the stem and onto the inner race and long enough to clear the top and few taps with hammer got it seated, wouldn’t damage the bearing as all force was on the inner race

            1 Reply Last reply
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            • S SpookDog

              Engines running sweetly, got the rear disc and calliper cleaned up, so have good brakes again. Only thing is that the right side indicators have stopped working along with the indicator dash light. Also got to wait for PJME to get the crank in stock. Always something on a 35 year old basket case, eh?
              Also got the new headstock bearing half way on and it won’t budge!…
              💀

              HOTSHOT IIIH Offline
              HOTSHOT IIIH Offline
              HOTSHOT III
              wrote on last edited by
              #655

              @SpookDog Have you machine-gunned your handlebar switches with WD40/GT85 lately? Just spray loads in until it fizzes and bubbles out of every orifice. Lots of little spring-loaded leccy contacty things inside them, it's a harsh environment for a switch. Good post-jet wash routine to get into 🌧

              S 1 Reply Last reply
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              • HOTSHOT IIIH HOTSHOT III

                @SpookDog Have you machine-gunned your handlebar switches with WD40/GT85 lately? Just spray loads in until it fizzes and bubbles out of every orifice. Lots of little spring-loaded leccy contacty things inside them, it's a harsh environment for a switch. Good post-jet wash routine to get into 🌧

                S Offline
                S Offline
                SpookDog
                wrote on last edited by
                #656

                @HOTSHOT-III

                First thing I tried 😛 gonna investigate it some more today…

                @OllieDTR

                I had it in the freezer for a few days! It was so cold wd40 was freezing on it into slush, couldn’t heat the bearing though. It has the bottom rubber seal fitted into it. Never seen one like it before…
                Gonna have to find a steel pipe 👍…

                S 1 Reply Last reply
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                • S SpookDog

                  @HOTSHOT-III

                  First thing I tried 😛 gonna investigate it some more today…

                  @OllieDTR

                  I had it in the freezer for a few days! It was so cold wd40 was freezing on it into slush, couldn’t heat the bearing though. It has the bottom rubber seal fitted into it. Never seen one like it before…
                  Gonna have to find a steel pipe 👍…

                  S Offline
                  S Offline
                  SpookDog
                  wrote on last edited by SpookDog
                  #657

                  Does anyone else with an early bike 88~96 have issues with the headlight dimming when the brake light comes on? It’s been bugging me forever since getting the bike! The headlight runs off of a/c directly from the stator coil, but the brake light is run off of the battery, it shouldn’t affect it! The only thing I can think of is that they share an earth?! I’ve just rigged up an earth to the frame straight from the battery. I’m gonna see if that helps any. The neutral light looks stronger anyways, as is the PV on the key 🙂 …

                  Fixed the indicators (& intermittent speedo bulb). Six new bullet connectors behind the headlight!! (& 1 bulb) The last couple years have been hard on the loom! Everything looks brighter on the battery now 🤞 …

                  Almost forgot: This may sound stupid, but: 2T oil from the exhaust ‘filming over’ the battery top, could it diminish the output amp/voltage? Mine was coated and the power valve & neutral light had gotten ‘sluggish’. It’s better since cleaning, but I’m not sure if it was this or a poor earth to the battery? I guess I’ll try not connecting the earth, later after night testing…

                  I wish I knew a motor cycle electrician/Wizard ⚡️…

                  S 1 Reply Last reply
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                  • S SpookDog

                    Does anyone else with an early bike 88~96 have issues with the headlight dimming when the brake light comes on? It’s been bugging me forever since getting the bike! The headlight runs off of a/c directly from the stator coil, but the brake light is run off of the battery, it shouldn’t affect it! The only thing I can think of is that they share an earth?! I’ve just rigged up an earth to the frame straight from the battery. I’m gonna see if that helps any. The neutral light looks stronger anyways, as is the PV on the key 🙂 …

                    Fixed the indicators (& intermittent speedo bulb). Six new bullet connectors behind the headlight!! (& 1 bulb) The last couple years have been hard on the loom! Everything looks brighter on the battery now 🤞 …

                    Almost forgot: This may sound stupid, but: 2T oil from the exhaust ‘filming over’ the battery top, could it diminish the output amp/voltage? Mine was coated and the power valve & neutral light had gotten ‘sluggish’. It’s better since cleaning, but I’m not sure if it was this or a poor earth to the battery? I guess I’ll try not connecting the earth, later after night testing…

                    I wish I knew a motor cycle electrician/Wizard ⚡️…

                    S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by SpookDog
                    #658

                    Headlight dimming when brake light is on: I really would like to know if other people with early 3 coil stator all have this problem. If I know it’s just my bike I can go about tracking it down and fixing the problem…

                    HOTSHOT IIIH MadGyverM 2 Replies Last reply
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                    • S SpookDog

                      Headlight dimming when brake light is on: I really would like to know if other people with early 3 coil stator all have this problem. If I know it’s just my bike I can go about tracking it down and fixing the problem…

                      HOTSHOT IIIH Offline
                      HOTSHOT IIIH Offline
                      HOTSHOT III
                      wrote on last edited by HOTSHOT III
                      #659

                      @SpookDog Lights dimming with brake lights/indicators/horn is not really a problem as such, we discussed this back in March IIRC. All the early DTRs I've owned have done this, the combined AC/DC electrical system is unique to the DTR:

                      https://dt125r.co.uk/post/29575

                      S 1 Reply Last reply
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                      • S SpookDog

                        Headlight dimming when brake light is on: I really would like to know if other people with early 3 coil stator all have this problem. If I know it’s just my bike I can go about tracking it down and fixing the problem…

                        MadGyverM Offline
                        MadGyverM Offline
                        MadGyver
                        wrote on last edited by
                        #660

                        @SpookDog At idle I had a little dimming but barely noticeable,when running not at all,my bike is and early with 3NC parts and cabling.

                        I need my tools and a pile of junk.....

                        1 Reply Last reply
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                        • HOTSHOT IIIH HOTSHOT III

                          @SpookDog Lights dimming with brake lights/indicators/horn is not really a problem as such, we discussed this back in March IIRC. All the early DTRs I've owned have done this, the combined AC/DC electrical system is unique to the DTR:

                          https://dt125r.co.uk/post/29575

                          S Offline
                          S Offline
                          SpookDog
                          wrote on last edited by SpookDog
                          #661

                          @MadGyver

                          Cheers bud! Mine dips regardless of revs. Tickover I could deal with…

                          @HOTSHOT-III
                          I can remember bringing it up but not if it got resolved in any way. It’s just gotten more noticeable the last couple nights I’ve ridden. Plus my electricals have gotten gremlins the last couple days…

                          Oh yeah! My brake light just blew…

                          1 Reply Last reply
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                          • CalumC Online
                            CalumC Online
                            Calum
                            wrote on last edited by
                            #662

                            Presumably they don't dim once the RPMs are up?

                            Always Originate, Never Pirate!

                            S 1 Reply Last reply
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                            • CalumC Calum

                              Presumably they don't dim once the RPMs are up?

                              S Offline
                              S Offline
                              SpookDog
                              wrote on last edited by
                              #663

                              @Calum

                              Mine dips regardless of revs. It’s well dodgy on windy roads at night…

                              S 1 Reply Last reply
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                              • S SpookDog

                                @Calum

                                Mine dips regardless of revs. It’s well dodgy on windy roads at night…

                                S Offline
                                S Offline
                                SpookDog
                                wrote on last edited by
                                #664

                                Unbelievable! Half way on a commute I’ve lost all power to the indicators, dash lights, ect. The AC to the headlight, tail light and dial lights is still there. If it was the battery I’d still have working indicators, ect, when the engines running wouldn’t I?…

                                S 1 Reply Last reply
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                                • CalumC Online
                                  CalumC Online
                                  Calum
                                  wrote on last edited by
                                  #665

                                  Yeah, that doesn't sound good! Have you blown the fuse?

                                  Always Originate, Never Pirate!

                                  1 Reply Last reply
                                  0
                                  • S SpookDog

                                    Unbelievable! Half way on a commute I’ve lost all power to the indicators, dash lights, ect. The AC to the headlight, tail light and dial lights is still there. If it was the battery I’d still have working indicators, ect, when the engines running wouldn’t I?…

                                    S Offline
                                    S Offline
                                    SpookDog
                                    wrote on last edited by SpookDog
                                    #666

                                    Wow! It was just the fuse, only had a 5a fitted. I didn’t realise that the battery carried 90% of the load for ancillaries! Makes me wonder even more about why it takes power away from the headlight!?! I need to try a different RR…

                                    I think it might be a weak earth. There was this ‘trick’ we used to do when water cooling PCs. The 12v fans were too loud so we would wire +12v to the fans positive and wire +5v to the negative. This would run the fan at 7v so it was quieter. Maybe something along these lines is happening?…

                                    S 1 Reply Last reply
                                    1
                                    • S SpookDog

                                      Wow! It was just the fuse, only had a 5a fitted. I didn’t realise that the battery carried 90% of the load for ancillaries! Makes me wonder even more about why it takes power away from the headlight!?! I need to try a different RR…

                                      I think it might be a weak earth. There was this ‘trick’ we used to do when water cooling PCs. The 12v fans were too loud so we would wire +12v to the fans positive and wire +5v to the negative. This would run the fan at 7v so it was quieter. Maybe something along these lines is happening?…

                                      S Offline
                                      S Offline
                                      SpookDog
                                      wrote on last edited by
                                      #667

                                      Blown again! Could a ‘sticky’ power valve cause it to blow? The PV runs off of the battery, yes?
                                      I used some non Castrol 2T oil and it leaves gum on the power valve…

                                      S 1 Reply Last reply
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                                      • S SpookDog

                                        Blown again! Could a ‘sticky’ power valve cause it to blow? The PV runs off of the battery, yes?
                                        I used some non Castrol 2T oil and it leaves gum on the power valve…

                                        S Offline
                                        S Offline
                                        SpookDog
                                        wrote on last edited by
                                        #668

                                        Ta Daa! For today’s drama! We have a snapped PV cable that appears to have been stuck together by the inner lining and kinda still operating!
                                        alt text

                                        Time to strip & clean the PV!…

                                        S 1 Reply Last reply
                                        2
                                        • S SpookDog

                                          Ta Daa! For today’s drama! We have a snapped PV cable that appears to have been stuck together by the inner lining and kinda still operating!
                                          alt text

                                          Time to strip & clean the PV!…

                                          S Offline
                                          S Offline
                                          SpookDog
                                          wrote on last edited by SpookDog
                                          #669

                                          Luckily I was able to purchase one of these that came with a 3mb-p barrel head & piston for £130! 🙂 Bless that fleabay vendor 😇
                                          alt text

                                          I hate spending time off the road when it’s not my choice!…

                                          S HOTSHOT IIIH 2 Replies Last reply
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