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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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  • CalumC Calum

    @irongamer727 Before you mess with the settings, try stifling the airbox, restrict the air box, see if that makes it better or worse. Or take the snorkel out. That'll give you a hint as to what the problem is.

    Irongamer727I Offline
    Irongamer727I Offline
    Irongamer727
    wrote on last edited by
    #52

    @calum the entire snorkel and the top plastic is cut out. I'll comment on the post I did a while back and you'll see

    1 Reply Last reply
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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #53

      Ah yeah, so with that then, it probably just wants a tad more fuel to compensate.

      Always Originate, Never Pirate!

      Irongamer727I 1 Reply Last reply
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      • CalumC Calum

        Ah yeah, so with that then, it probably just wants a tad more fuel to compensate.

        Irongamer727I Offline
        Irongamer727I Offline
        Irongamer727
        wrote on last edited by
        #54

        @calum I guess I could order a bigger idle jet or wait for the summer...

        CalumC 1 Reply Last reply
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        • Irongamer727I Irongamer727

          @calum I guess I could order a bigger idle jet or wait for the summer...

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by Calum
          #55

          @irongamer727 Either way it doesn't sound right.

          If it were fueling, it would start if you opened the throttle ajar.

          Always Originate, Never Pirate!

          Irongamer727I 1 Reply Last reply
          0
          • CalumC Calum

            @irongamer727 Either way it doesn't sound right.

            If it were fueling, it would start if you opened the throttle ajar.

            Irongamer727I Offline
            Irongamer727I Offline
            Irongamer727
            wrote on last edited by Irongamer727
            #56

            @calum recommendations then?
            It has never ever wanted to start with throttle. With or without the big bore. With the previous cylinder it would at least start fast cold.

            CalumC 1 Reply Last reply
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            • Irongamer727I Irongamer727

              @calum recommendations then?
              It has never ever wanted to start with throttle. With or without the big bore. With the previous cylinder it would at least start fast cold.

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #57

              @irongamer727 Better carb mate.

              I had issues with my Athena as well. Carb sorted that out.

              I had issues with the stock cylinder. Carb sorted that out.

              Always Originate, Never Pirate!

              Irongamer727I 1 Reply Last reply
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              • CalumC Calum

                @irongamer727 Better carb mate.

                I had issues with my Athena as well. Carb sorted that out.

                I had issues with the stock cylinder. Carb sorted that out.

                Irongamer727I Offline
                Irongamer727I Offline
                Irongamer727
                wrote on last edited by
                #58

                @calum ehm. No. Won't change that. Problem lies somewhere else.

                CalumC 1 Reply Last reply
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                • Irongamer727I Offline
                  Irongamer727I Offline
                  Irongamer727
                  wrote on last edited by
                  #59

                  If I only had a kickstart...

                  1 Reply Last reply
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                  • Irongamer727I Irongamer727

                    @calum ehm. No. Won't change that. Problem lies somewhere else.

                    CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #60

                    @irongamer727 That's what you want mate.

                    alt text

                    https://www.ebay.co.uk/itm/YAMAHA-TZR-125-4DL-yr-92-CARBURETTOR-DELLORTO-VHSA-32-GS/282744266127?hash=item41d4df1d8f:g:GTwAAOSwrhhaFTOk

                    That'll fix your problem guaranteed!

                    I literally don't know why the original carb sucks balls lol.

                    Always Originate, Never Pirate!

                    declanD 1 Reply Last reply
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                    • CalumC Calum

                      @irongamer727 That's what you want mate.

                      alt text

                      https://www.ebay.co.uk/itm/YAMAHA-TZR-125-4DL-yr-92-CARBURETTOR-DELLORTO-VHSA-32-GS/282744266127?hash=item41d4df1d8f:g:GTwAAOSwrhhaFTOk

                      That'll fix your problem guaranteed!

                      I literally don't know why the original carb sucks balls lol.

                      declanD Offline
                      declanD Offline
                      declan
                      wrote on last edited by
                      #61

                      @calum I’d rathet bump start it than pay that price lol

                      CalumC 1 Reply Last reply
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                      • declanD declan

                        @calum I’d rathet bump start it than pay that price lol

                        CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #62

                        @declan Yeah but that's just the cost of tuning for you bud.

                        Always Originate, Never Pirate!

                        declanD 1 Reply Last reply
                        0
                        • CalumC Calum

                          @declan Yeah but that's just the cost of tuning for you bud.

                          declanD Offline
                          declanD Offline
                          declan
                          wrote on last edited by
                          #63

                          @calum cost of genuine carbs tbh carbs are quite pricey

                          1 Reply Last reply
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                          • Irongamer727I Offline
                            Irongamer727I Offline
                            Irongamer727
                            wrote on last edited by
                            #64

                            Things are not going my way. 180km into break in I spotted 2 small holes on the cylinder. I have spoken to the company I bought the kit from and they will contact Athena for assistance. Hopefully this ends well..

                            https://youtu.be/JSdh4gz1p8w

                            1 Reply Last reply
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                            • Irongamer727I Offline
                              Irongamer727I Offline
                              Irongamer727
                              wrote on last edited by
                              #65

                              What do you think? I've now fitted a 310 main jet and she's still a bit down on power. It felt better than the 290 for sure. Now I'm thinking about buying a couple of extra jets, 320-350.
                              Is this even possible? I've not spoken to anyone running higher than 280.

                              1 Reply Last reply
                              0
                              • 2 Offline
                                2 Offline
                                2stroketerry
                                wrote on last edited by
                                #66

                                If using a TM28 carb then need a 300 main jet with a 27.5 idle jet. Main jets go up to 430. Put clip in the bottom groove on needle.
                                https://www.sip-scootershop.com/en/products/main+jet+mikuni+300+_40703000

                                https://www.sip-scootershop.com/en/products/idle+jet+mikuni+275+_40726000

                                Irongamer727I 1 Reply Last reply
                                0
                                • 2 2stroketerry

                                  If using a TM28 carb then need a 300 main jet with a 27.5 idle jet. Main jets go up to 430. Put clip in the bottom groove on needle.
                                  https://www.sip-scootershop.com/en/products/main+jet+mikuni+300+_40703000

                                  https://www.sip-scootershop.com/en/products/idle+jet+mikuni+275+_40726000

                                  Irongamer727I Offline
                                  Irongamer727I Offline
                                  Irongamer727
                                  wrote on last edited by
                                  #67

                                  @2stroketerry I'm running 310 now and it's certainly not optimal. Idle is 35 now, definitely too big.

                                  1 Reply Last reply
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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
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