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  4. Dtr 125 racing rota / stator / flywheel

Dtr 125 racing rota / stator / flywheel

Scheduled Pinned Locked Moved Electrics
dt125rota
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  • stinkwheelerS stinkwheeler

    @calum im mainly asking as i have one fitted to my rs125 which i use for work everyday which i do approximately 35 miles a day which made a huge improvement (aside from having to bump it ) it made the lights much better and it definitely made a small increase in power I've been running it now just under 3 years on a rotax 123 engine on the road so i cant see the physics behind it being much differant on a dt ... that engine pictured was for road use and fits a standard loom . I was really asking if anyone knew where i could source one for the dt many thanks

    CalumC Online
    CalumC Online
    Calum
    wrote on last edited by
    #6

    @stinkwheeler Wow that's mental? You've been running one on your RS with no issues?

    Do what I done to my RS, convert it to kick start 😉

    Always Originate, Never Pirate!

    stinkwheelerS 1 Reply Last reply
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    • CalumC Calum

      @stinkwheeler Wow that's mental? You've been running one on your RS with no issues?

      Do what I done to my RS, convert it to kick start 😉

      stinkwheelerS Offline
      stinkwheelerS Offline
      stinkwheeler
      wrote on last edited by
      #7

      @calum yea its been fine ... is it easy to convert the 123 engine to kickstart ? Or do you have the 122 engine as id imagine there different and i couldn't get hold of an sp engine or one from the rx ..... i run a extremely ported polini 160 (by mick abby) ... lectron 38 mm carb ... race inner rota with lightened flywheel ( which i also drilled out to make it even lighter ) rave 2 pnematic pv vforce reeds and a tyga stainless pipe

      The hills are alive with the sound of ... braaaap baaaaap 😁

      CalumC 1 Reply Last reply
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      • Louis-DT-WRL Offline
        Louis-DT-WRL Offline
        Louis-DT-WR
        wrote on last edited by
        #8

        Probably a custom job with adapters, that engine looks like a 1 off

        1 Reply Last reply
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        • stinkwheelerS stinkwheeler

          @calum yea its been fine ... is it easy to convert the 123 engine to kickstart ? Or do you have the 122 engine as id imagine there different and i couldn't get hold of an sp engine or one from the rx ..... i run a extremely ported polini 160 (by mick abby) ... lectron 38 mm carb ... race inner rota with lightened flywheel ( which i also drilled out to make it even lighter ) rave 2 pnematic pv vforce reeds and a tyga stainless pipe

          CalumC Online
          CalumC Online
          Calum
          wrote on last edited by
          #9

          @stinkwheeler Oh that's mental. I heard about the lectron carb, any good?

          Yeah I have a rotax 122 engine, still though I thought they were very similar.

          That's pretty crazy spec to be fair.

          Always Originate, Never Pirate!

          stinkwheelerS 1 Reply Last reply
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          • CalumC Calum

            @stinkwheeler Oh that's mental. I heard about the lectron carb, any good?

            Yeah I have a rotax 122 engine, still though I thought they were very similar.

            That's pretty crazy spec to be fair.

            stinkwheelerS Offline
            stinkwheelerS Offline
            stinkwheeler
            wrote on last edited by
            #10

            @calum err lectron carbs are pretty good to be fair but you have to modifiy or get a custom throttle cable made as the inner cable needs to be longer ... but essentially you have no jets so tuning should be easier.... saying that it took a while to set up but definitely worth it ..... its never missed a beat in the 3 years I've owned it ... the thing with the rs is to run as tight squish as possible im on .8 atm its really quick but i hate the rs ... the side stand is rubbish ..and the lights ... im 6.2 and 30 ... so its also tiny and gives me a bad back 😂

            The hills are alive with the sound of ... braaaap baaaaap 😁

            CalumC 1 Reply Last reply
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            • stinkwheelerS stinkwheeler

              @calum err lectron carbs are pretty good to be fair but you have to modifiy or get a custom throttle cable made as the inner cable needs to be longer ... but essentially you have no jets so tuning should be easier.... saying that it took a while to set up but definitely worth it ..... its never missed a beat in the 3 years I've owned it ... the thing with the rs is to run as tight squish as possible im on .8 atm its really quick but i hate the rs ... the side stand is rubbish ..and the lights ... im 6.2 and 30 ... so its also tiny and gives me a bad back 😂

              CalumC Online
              CalumC Online
              Calum
              wrote on last edited by
              #11

              @stinkwheeler Yeah, fair enough. It's meant for teenagers after all.

              The Polini kits weren't the most reliable of big bore kits, had one before. Bike went mental, but standard seized. I put it down to poorly jetted, but sounds like you've got that covered.

              Brother picked up a Cagiva Raptor the other day, same age as you (little bit shorter) and that's just lovely to ride. I had a quick blast on it, probably about the same height as you, and I thought it was perfectly comfortable. It's basically a naked Cagiva Mito.

              Always Originate, Never Pirate!

              stinkwheelerS 1 Reply Last reply
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              • CalumC Calum

                @stinkwheeler Yeah, fair enough. It's meant for teenagers after all.

                The Polini kits weren't the most reliable of big bore kits, had one before. Bike went mental, but standard seized. I put it down to poorly jetted, but sounds like you've got that covered.

                Brother picked up a Cagiva Raptor the other day, same age as you (little bit shorter) and that's just lovely to ride. I had a quick blast on it, probably about the same height as you, and I thought it was perfectly comfortable. It's basically a naked Cagiva Mito.

                stinkwheelerS Offline
                stinkwheelerS Offline
                stinkwheeler
                wrote on last edited by
                #12

                @calum my polini kit has been sweet just run it slightly rich always and running no base gasket is the trick ... just use instant gasket 😉 ..... and the thing is i want another dt mine was stolen and i bought the rs ..... i want to build another dt with ported athena 170 .. race inner rota .... 34mm Klein flatslide v force reeds stainless pipe ect ... thats why I'm on here stealing ideas looking to spend 4k on this one 🙂

                The hills are alive with the sound of ... braaaap baaaaap 😁

                CalumC 1 Reply Last reply
                2
                • stinkwheelerS stinkwheeler

                  @calum my polini kit has been sweet just run it slightly rich always and running no base gasket is the trick ... just use instant gasket 😉 ..... and the thing is i want another dt mine was stolen and i bought the rs ..... i want to build another dt with ported athena 170 .. race inner rota .... 34mm Klein flatslide v force reeds stainless pipe ect ... thats why I'm on here stealing ideas looking to spend 4k on this one 🙂

                  CalumC Online
                  CalumC Online
                  Calum
                  wrote on last edited by
                  #13

                  @stinkwheeler Keep us posted

                  Always Originate, Never Pirate!

                  1 Reply Last reply
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                  • Glynn123G Offline
                    Glynn123G Offline
                    Glynn123
                    wrote on last edited by
                    #14

                    So what's the actual effects of these inner rotas? Never heard much about them

                    CalumC 1 Reply Last reply
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                    • Glynn123G Glynn123

                      So what's the actual effects of these inner rotas? Never heard much about them

                      CalumC Online
                      CalumC Online
                      Calum
                      wrote on last edited by
                      #15

                      @glynn123 Common on peds.

                      Basically reverse the operation of the flywheel. Instead of spinning a heavy magnet around the stator. Spin the magnet inside the stator.

                      It's more compact and light, but won't generate the same amount of electricity.

                      But a lightweight flywheel isn't really what you want on a daily.

                      For a car, it'll destroy the mains. Makes them really annoying to drive since and bump in the road will cause the engine to spin up to red line. A flywheel is meant to be an energy store, so lightening allow it to spin up, but consequently at a reduction of stored energy.

                      Always Originate, Never Pirate!

                      Irongamer727I 1 Reply Last reply
                      0
                      • CalumC Calum

                        @glynn123 Common on peds.

                        Basically reverse the operation of the flywheel. Instead of spinning a heavy magnet around the stator. Spin the magnet inside the stator.

                        It's more compact and light, but won't generate the same amount of electricity.

                        But a lightweight flywheel isn't really what you want on a daily.

                        For a car, it'll destroy the mains. Makes them really annoying to drive since and bump in the road will cause the engine to spin up to red line. A flywheel is meant to be an energy store, so lightening allow it to spin up, but consequently at a reduction of stored energy.

                        Irongamer727I Offline
                        Irongamer727I Offline
                        Irongamer727
                        wrote on last edited by
                        #16

                        @calum How does them racing rotors destroy the engine?

                        1 Reply Last reply
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