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DT125R FORUM

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  4. Athena 170

Athena 170

Scheduled Pinned Locked Moved Top End
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  • Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #68

    In reality, what would cause the bike not to start on the first or second spin on the starter. Is it just down to the pilot jet and fuel/Air mix?
    Obviously a good battery and fresh electric components will make things easier but I got that covered.

    I've read in the Haynes that there is supposed to be a starter jet in the later carbs? Much of what that books says makes no sense...

    1 Reply Last reply
    0
    • Louis-DT-WRL Offline
      Louis-DT-WRL Offline
      Louis-DT-WR
      wrote on last edited by
      #69

      I run the autolube on my dt125r bottom end with wr200 top end. I just adjusted it to suit the larger capacity. I've run it for years. Autolube is brilliant

      Irongamer727I 1 Reply Last reply
      2
      • Louis-DT-WRL Louis-DT-WR

        I run the autolube on my dt125r bottom end with wr200 top end. I just adjusted it to suit the larger capacity. I've run it for years. Autolube is brilliant

        Irongamer727I Offline
        Irongamer727I Offline
        Irongamer727
        wrote on last edited by Irongamer727
        #70

        @louis-james hows that thing to start?

        1 Reply Last reply
        0
        • Louis-DT-WRL Offline
          Louis-DT-WRL Offline
          Louis-DT-WR
          wrote on last edited by
          #71

          First kick 99% of the time

          Irongamer727I 1 Reply Last reply
          0
          • Louis-DT-WRL Louis-DT-WR

            First kick 99% of the time

            Irongamer727I Offline
            Irongamer727I Offline
            Irongamer727
            wrote on last edited by
            #72

            @louis-james you run the 28mm carb? The flat one?

            1 Reply Last reply
            0
            • Louis-DT-WRL Offline
              Louis-DT-WRL Offline
              Louis-DT-WR
              wrote on last edited by
              #73

              I used to, I had the tmx30 for a while, now a tm34ss

              Irongamer727I 1 Reply Last reply
              0
              • Louis-DT-WRL Louis-DT-WR

                I used to, I had the tmx30 for a while, now a tm34ss

                Irongamer727I Offline
                Irongamer727I Offline
                Irongamer727
                wrote on last edited by
                #74

                @louis-james you ran the 28 with the wr200?

                1 Reply Last reply
                0
                • Louis-DT-WRL Offline
                  Louis-DT-WRL Offline
                  Louis-DT-WR
                  wrote on last edited by
                  #75

                  No, I had the 30 when it was still a 125. Lid was cut off the air box the the 28mm btw

                  Irongamer727I 1 Reply Last reply
                  0
                  • Louis-DT-WRL Louis-DT-WR

                    No, I had the 30 when it was still a 125. Lid was cut off the air box the the 28mm btw

                    Irongamer727I Offline
                    Irongamer727I Offline
                    Irongamer727
                    wrote on last edited by
                    #76

                    @louis-james alright

                    Louis-DT-WRL 1 Reply Last reply
                    0
                    • Irongamer727I Irongamer727

                      @louis-james alright

                      Louis-DT-WRL Offline
                      Louis-DT-WRL Offline
                      Louis-DT-WR
                      wrote on last edited by
                      #77

                      @irongamer727 recommend getting a decent reed block on there. Many can be modified to fit

                      Irongamer727I 1 Reply Last reply
                      0
                      • Louis-DT-WRL Louis-DT-WR

                        @irongamer727 recommend getting a decent reed block on there. Many can be modified to fit

                        Irongamer727I Offline
                        Irongamer727I Offline
                        Irongamer727
                        wrote on last edited by
                        #78

                        @louis-james naah at the moment I simply want her to run good, start easy and stay that way.

                        1 Reply Last reply
                        0
                        • Irongamer727I Offline
                          Irongamer727I Offline
                          Irongamer727
                          wrote on last edited by Irongamer727
                          #79

                          As I suspected my pilot jet to be too big (size 35) I ordered a smaller 25. But the bike literally ran like shit and the idle was very uncontrolled and the bike just sounded wrong!

                          Is the next step to order a larger?
                          I can without a drop in rpm turn the airscrew all the way in, no change really.

                          That must be an indicator that it's to small right?

                          1 Reply Last reply
                          0
                          • J Offline
                            J Offline
                            Jens Eskildsen
                            wrote on last edited by
                            #80

                            Yeb sounds like you need to up the idlejet in size.

                            1 Reply Last reply
                            0
                            • Irongamer727I Offline
                              Irongamer727I Offline
                              Irongamer727
                              wrote on last edited by
                              #81

                              @Calum agree?

                              1 Reply Last reply
                              0
                              • Glynn123G Offline
                                Glynn123G Offline
                                Glynn123
                                wrote on last edited by
                                #82

                                Id go a fair bit bigger idle jet than a 25, im running a 27.5 pilot on 125 bore with snorkel removed here in sunny scotland, id imagine the 170 kit would require a fair bit bigger pilot especially in your climate, maybe a 30?

                                Irongamer727I 1 Reply Last reply
                                0
                                • Glynn123G Glynn123

                                  Id go a fair bit bigger idle jet than a 25, im running a 27.5 pilot on 125 bore with snorkel removed here in sunny scotland, id imagine the 170 kit would require a fair bit bigger pilot especially in your climate, maybe a 30?

                                  Irongamer727I Offline
                                  Irongamer727I Offline
                                  Irongamer727
                                  wrote on last edited by
                                  #83

                                  @glynn123 I'm running 35 now.

                                  1 Reply Last reply
                                  0
                                  • Irongamer727I Offline
                                    Irongamer727I Offline
                                    Irongamer727
                                    wrote on last edited by
                                    #84

                                    I'm now contacting Adrenalin (the company I bought the kit from) and I'm asking for a refund.

                                    The issue is that the casting is shite, there is a microscopic hole on the cylinder that leaks coolant, and that the powervalve housing is too big so the bush cannot seal properly.

                                    Exhaust gases and oil pours out if the pv, bruh.
                                    I have more or less demanded a refund, but I don't think they will give me that until Athena in Italy have examined it..

                                    In theory I won't have the Dt running for over a month, unless I immediately mount another cylinder I had from a spare engine..

                                    That means all my jets have been bought in vain and all that, great.

                                    The lesson here is: Do not buy the stupid Athena big bore kit. Even if you don't get a really bad one the power gains are barely notable.
                                    To really benefit from it a lot more have to be done.

                                    Sometimes life isn't easy..

                                    CalumC D 2 Replies Last reply
                                    1
                                    • Irongamer727I Irongamer727

                                      I'm now contacting Adrenalin (the company I bought the kit from) and I'm asking for a refund.

                                      The issue is that the casting is shite, there is a microscopic hole on the cylinder that leaks coolant, and that the powervalve housing is too big so the bush cannot seal properly.

                                      Exhaust gases and oil pours out if the pv, bruh.
                                      I have more or less demanded a refund, but I don't think they will give me that until Athena in Italy have examined it..

                                      In theory I won't have the Dt running for over a month, unless I immediately mount another cylinder I had from a spare engine..

                                      That means all my jets have been bought in vain and all that, great.

                                      The lesson here is: Do not buy the stupid Athena big bore kit. Even if you don't get a really bad one the power gains are barely notable.
                                      To really benefit from it a lot more have to be done.

                                      Sometimes life isn't easy..

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #85

                                      @irongamer727 I'm sorry to hear that bud, been there, done that, got the T-Shirt.

                                      To be fair, I didn't have half of the issues you have and at the time (being 17) I thought the gains were decent.

                                      But having been on an Aprilia, and for you the Honda, you begin to realise that the Athena kit is still worse than a decent engine. The DT is a cracking bike for everyday use, but I wouldn't bother with much else. Zeeltronic gave the biggest improvement. Bigger carb, V-Force reed block is tempting and exhaust. That'll give your DT a really nice improvement in power, without compromising reliability. And then enjoy the 20 or so brake it gives you.

                                      Always Originate, Never Pirate!

                                      1 Reply Last reply
                                      0
                                      • Irongamer727I Irongamer727

                                        I'm now contacting Adrenalin (the company I bought the kit from) and I'm asking for a refund.

                                        The issue is that the casting is shite, there is a microscopic hole on the cylinder that leaks coolant, and that the powervalve housing is too big so the bush cannot seal properly.

                                        Exhaust gases and oil pours out if the pv, bruh.
                                        I have more or less demanded a refund, but I don't think they will give me that until Athena in Italy have examined it..

                                        In theory I won't have the Dt running for over a month, unless I immediately mount another cylinder I had from a spare engine..

                                        That means all my jets have been bought in vain and all that, great.

                                        The lesson here is: Do not buy the stupid Athena big bore kit. Even if you don't get a really bad one the power gains are barely notable.
                                        To really benefit from it a lot more have to be done.

                                        Sometimes life isn't easy..

                                        D Offline
                                        D Offline
                                        DT125Noob
                                        wrote on last edited by
                                        #86

                                        @irongamer727 I've had casting issues with polini and malossi too. Never good fun. Usually they still need case matching and porting work. Not too bad when you can get new, performance crank cases for like a hundred quid on the little peds. Horrible if you enjoy a bike other than a moped basically. Incidentally just ordered an Athena kit to take a good look myself.

                                        Current bikes:
                                        1973 Vespa Ciao (80 Polini Evolution RV)
                                        1988 Vespa Bravo (100 Simonini side intake RV)
                                        1989 Honda ZB50 (125 Takegawa dry clutch)
                                        1983 RD350 YPVS 31k (TZ500 Front end and wheels)
                                        1991 DT125R (French electric + kick standard)
                                        1973 Honda PC50

                                        1 Reply Last reply
                                        0
                                        • Irongamer727I Offline
                                          Irongamer727I Offline
                                          Irongamer727
                                          wrote on last edited by Irongamer727
                                          #87

                                          What would you do?

                                          Take a full refund and buy a forged piston to the original Cylinder and mount that or take another Athena cylinder?

                                          The carb is already set up for the Athena but it's not much work to set it back to stock.

                                          Could the bike be worth more with the Athena?

                                          F 1 Reply Last reply
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