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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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  • 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
                      0
                      • Irongamer727I Irongamer727

                        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 Offline
                        F Offline
                        finnerz89
                        wrote on last edited by
                        #88

                        @irongamer727 I don't think so, if it were me in the market for a bike I'd rather buy stock or close to it and do the work myself.

                        Other people might feel differently but that's my 2p

                        Current bikes:
                        DT125X '07
                        Street Triple R '11
                        Aprilia ETV1000 '02

                        Previous:
                        DR650RSE '96
                        FJ1200 '92

                        1 Reply Last reply
                        0
                        • O Offline
                          O Offline
                          oldman
                          wrote on last edited by
                          #89

                          Me, I would put back to stock and live with that, at least you know where you are with that. If you get another barrel could be more problems and no guarantee jetting would remain the same.
                          But that's me.

                          1 Reply Last reply
                          0
                          • Glynn123G Offline
                            Glynn123G Offline
                            Glynn123
                            wrote on last edited by
                            #90

                            Would rather a standard bore than a 170 if I'm honest, get it ported and I'm doubting itd be far off the Athena. Or if you're feeling the bigger cc kits splash out for a BARacing 200kit and really feel the power 😍

                            Irongamer727I 1 Reply Last reply
                            1
                            • Glynn123G Glynn123

                              Would rather a standard bore than a 170 if I'm honest, get it ported and I'm doubting itd be far off the Athena. Or if you're feeling the bigger cc kits splash out for a BARacing 200kit and really feel the power 😍

                              Irongamer727I Offline
                              Irongamer727I Offline
                              Irongamer727
                              wrote on last edited by
                              #91

                              @glynn123 I'm so done with the big bore kits

                              declanD 1 Reply Last reply
                              0
                              • Irongamer727I Irongamer727

                                @glynn123 I'm so done with the big bore kits

                                declanD Offline
                                declanD Offline
                                declan
                                wrote on last edited by
                                #92

                                @irongamer727 I feel your pain bro

                                1 Reply Last reply
                                0
                                • CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #93

                                  Get the stock barrel ported and engine the 14k red line.

                                  Always Originate, Never Pirate!

                                  Irongamer727I 1 Reply Last reply
                                  0
                                  • B Offline
                                    B Offline
                                    Bananper
                                    wrote on last edited by
                                    #94

                                    Does the 170 kit even give more power? I've heard so much bad about it 😂

                                    CalumC 1 Reply Last reply
                                    0
                                    • B Bananper

                                      Does the 170 kit even give more power? I've heard so much bad about it 😂

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #95

                                      @bananper Not peak, but more power through the midrange. I want to say torque, but I always get thumbed down for saying that.

                                      Always Originate, Never Pirate!

                                      B 1 Reply Last reply
                                      2
                                      • CalumC Calum

                                        @bananper Not peak, but more power through the midrange. I want to say torque, but I always get thumbed down for saying that.

                                        B Offline
                                        B Offline
                                        Bananper
                                        wrote on last edited by
                                        #96

                                        @calum so basically you lose some peak power in exchange for mid range power? Correct me if I'm wrong 🤓

                                        CalumC 1 Reply Last reply
                                        0
                                        • CalumC Calum

                                          Get the stock barrel ported and engine the 14k red line.

                                          Irongamer727I Offline
                                          Irongamer727I Offline
                                          Irongamer727
                                          wrote on last edited by
                                          #97

                                          @calum Ehmm 😬

                                          1 Reply Last reply
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