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DT125R FORUM

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  4. Dt170 vs ktm exc 125

Dt170 vs ktm exc 125

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  • declanD declan

    @calum so I can get performance cranks which increase compression there’s a few so your saying that with a nice crank re bore and specialist porting I could get pretty impressive figures? I’m obviously and a Bafoon when it comes to this stuff

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #73

    @declan I'm saying with lots of cash you could achieve anything. But it's pointless at this point as you may as well have bought a better engine.

    Always Originate, Never Pirate!

    declanD CalumC 2 Replies Last reply
    0
    • CalumC Calum

      @declan I'm saying with lots of cash you could achieve anything. But it's pointless at this point as you may as well have bought a better engine.

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #74

      @calum like a dt engine 😁

      1 Reply Last reply
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      • CalumC Calum

        @declan I'm saying with lots of cash you could achieve anything. But it's pointless at this point as you may as well have bought a better engine.

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #75

        @declan Like a Rotax engine. Personally.

        I think they're really versatile. Loads of tuning bikes, were used competitively yet have all the features to make them tame for the road. Can be tuned very well, and take lots of power.

        Always Originate, Never Pirate!

        NINJAN 1 Reply Last reply
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        • CalumC Calum

          @declan Like a Rotax engine. Personally.

          I think they're really versatile. Loads of tuning bikes, were used competitively yet have all the features to make them tame for the road. Can be tuned very well, and take lots of power.

          NINJAN Offline
          NINJAN Offline
          NINJA
          wrote on last edited by
          #76

          @calum Take or Make lots of power ???

          SEDUCED BY THE DARK SIDE!!!

          CalumC 1 Reply Last reply
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          • Irongamer727I Irongamer727

            @calum listen to this. https://youtu.be/IuAemxWYHLw It is sounding sooooo good. Especially on idle. Love that 2 stroke sound. But, my Dt never sounds like that. With arrow exhaust. Do you need like a fmf shorty to acquire that type of sound?

            Glynn123G Offline
            Glynn123G Offline
            Glynn123
            wrote on last edited by
            #77

            @irongamer727 That sound is obviously deeper being a 170, but it sounds similar to my Romeu Hendriques system? but ofcourse its alot quieter on my bike haha, I had an old style circular Dep silencer a while ago on my DT and it was very loud and sounded "poppy" like that 170, im pretty sure it had no or very little packing in it haha.
            This is a clip of my bike, sounds better in real life mind
            https://youtu.be/d51-dlxQV8g

            Irongamer727I 1 Reply Last reply
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            • NINJAN NINJA

              @calum Take or Make lots of power ???

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #78

              @ninja Take, they TAKE lots of stick. They blow up, sure they are prone to failure. But that's cause people shove loads of power into them lmao!

              Always Originate, Never Pirate!

              1 Reply Last reply
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              • Glynn123G Glynn123

                @irongamer727 That sound is obviously deeper being a 170, but it sounds similar to my Romeu Hendriques system? but ofcourse its alot quieter on my bike haha, I had an old style circular Dep silencer a while ago on my DT and it was very loud and sounded "poppy" like that 170, im pretty sure it had no or very little packing in it haha.
                This is a clip of my bike, sounds better in real life mind
                https://youtu.be/d51-dlxQV8g

                Irongamer727I Offline
                Irongamer727I Offline
                Irongamer727
                wrote on last edited by
                #79

                @glynn123 nice! Guess you have to remove the stuffing completely to make it sound like the 170 video.

                CalumC 1 Reply Last reply
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                • Irongamer727I Irongamer727

                  @glynn123 nice! Guess you have to remove the stuffing completely to make it sound like the 170 video.

                  CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #80

                  @irongamer727 No don't do that. That would sound sh!t

                  Always Originate, Never Pirate!

                  1 Reply Last reply
                  0
                  • DartyD Offline
                    DartyD Offline
                    Darty
                    wrote on last edited by
                    #81

                    @Irongamer727 No exhaust stuffing is actually counter productive,

                    but, Induction plays an important role in the exhaust note.

                    alt text

                    Mine sounds really good.

                    Keep it real

                    declanD Irongamer727I 2 Replies Last reply
                    1
                    • DartyD Darty

                      @Irongamer727 No exhaust stuffing is actually counter productive,

                      but, Induction plays an important role in the exhaust note.

                      alt text

                      Mine sounds really good.

                      declanD Offline
                      declanD Offline
                      declan
                      wrote on last edited by
                      #82

                      @darty snorkel is doing a great job there bud πŸ˜‚πŸ˜‚

                      NINJAN DartyD 2 Replies Last reply
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                      • declanD declan

                        @darty snorkel is doing a great job there bud πŸ˜‚πŸ˜‚

                        NINJAN Offline
                        NINJAN Offline
                        NINJA
                        wrote on last edited by NINJA
                        #83

                        @declan It's open plan dude, that's all the rage in interior design!!! πŸ˜†

                        SEDUCED BY THE DARK SIDE!!!

                        1 Reply Last reply
                        1
                        • DartyD Darty

                          @Irongamer727 No exhaust stuffing is actually counter productive,

                          but, Induction plays an important role in the exhaust note.

                          alt text

                          Mine sounds really good.

                          Irongamer727I Offline
                          Irongamer727I Offline
                          Irongamer727
                          wrote on last edited by
                          #84

                          @darty still my Arrow exhaust sounds pretty much the same as stock exhaust.

                          1 Reply Last reply
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                          • declanD declan

                            @darty snorkel is doing a great job there bud πŸ˜‚πŸ˜‚

                            DartyD Offline
                            DartyD Offline
                            Darty
                            wrote on last edited by
                            #85

                            @declan The snorkel still helps to stabilise air flow, even with a Lanza 230 snorkel, You just cant get enough air through it!

                            Airbox is quite restrictive when your tuning these,

                            Keep it real

                            1 Reply Last reply
                            2
                            • NINJAN Offline
                              NINJAN Offline
                              NINJA
                              wrote on last edited by
                              #86

                              I am always confused as to how any air is sucked in with the air box and snorkel system? To me is looks to be pointing in the wrong direction and I always feel that the rider and seat will reduce airflow around that area too. But I guess it is not too restrictive as all bikes perform extremely well with the air box and snorkel set-up. Has anyone tried small air scoops on the side of the air box to draw air into the box at all ???

                              SEDUCED BY THE DARK SIDE!!!

                              CalumC 1 Reply Last reply
                              0
                              • NINJAN NINJA

                                I am always confused as to how any air is sucked in with the air box and snorkel system? To me is looks to be pointing in the wrong direction and I always feel that the rider and seat will reduce airflow around that area too. But I guess it is not too restrictive as all bikes perform extremely well with the air box and snorkel set-up. Has anyone tried small air scoops on the side of the air box to draw air into the box at all ???

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #87

                                @ninja Ahem, RAM AIR.

                                Also Aprilia RS125's do this. They take a scoop from the nose cone, and force it into the air box lol.

                                But you can get nasty negative air pressure coefficients that cause adverse effects.

                                Always Originate, Never Pirate!

                                1 Reply Last reply
                                0
                                • Glynn123G Offline
                                  Glynn123G Offline
                                  Glynn123
                                  wrote on last edited by
                                  #88

                                  I removed my airbox snorkel and upjetted carb, very good sound and possibly abit more power? Not noticeable mind but does sound brilliant.

                                  S 1 Reply Last reply
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                                  • Irongamer727I Irongamer727

                                    @scrimsmustang don't think it will win over a wr200 but you're right, they are powerful. I Wonder how Honda manages to squeeze out 30 bhp and how Yamaha only ~20 bhp. Seems odd.

                                    S Offline
                                    S Offline
                                    scrimsmustang
                                    wrote on last edited by scrimsmustang
                                    #89

                                    @irongamer727 said in Dt170 vs ktm exc 125:

                                    @scrimsmustang don't think it will win over a wr200 but you're right, they are powerful. I Wonder how Honda manages to squeeze out 30 bhp and how Yamaha only ~20 bhp. Seems odd.

                                    CRM will piss over the WR200 ive had a fair few 200,s and the Honda would just laugh at the 200, 125 or not.

                                    Poo DT200WR compared to CRM
                                    alt text

                                    Poo WR200R compared to CRM
                                    alt text

                                    Mint CRM125R
                                    alt text

                                    1 Reply Last reply
                                    1
                                    • Glynn123G Glynn123

                                      I removed my airbox snorkel and upjetted carb, very good sound and possibly abit more power? Not noticeable mind but does sound brilliant.

                                      S Offline
                                      S Offline
                                      scrimsmustang
                                      wrote on last edited by
                                      #90

                                      @glynn123 said in Dt170 vs ktm exc 125:

                                      I removed my airbox snorkel and upjetted carb, very good sound and possibly abit more power? Not noticeable mind but does sound brilliant.

                                      Its the mixture screw and pilot jet you need to tweek when you remove the snorkel on a DTR mostly as they bog down at low rpm due to the air rich mixture, dial it out and you get a lot better low down acceleration.

                                      Glynn123G 1 Reply Last reply
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                                      • D DTR+NSR

                                        I doubt the crm has a genuine 30bhp. I've got a nsr125 with basically the same engine as the crm. Doesn't 'feel' that much faster than my dtr, wether that's just down to the gearing, as the nsr has alot longer legs.

                                        S Offline
                                        S Offline
                                        scrimsmustang
                                        wrote on last edited by
                                        #91

                                        @dtr-nsr said in Dt170 vs ktm exc 125:

                                        I doubt the crm has a genuine 30bhp. I've got a nsr125 with basically the same engine as the crm. Doesn't 'feel' that much faster than my dtr, wether that's just down to the gearing, as the nsr has alot longer legs.

                                        Is the NSR derestricted properly ? Should pull atleast 110 derestricted

                                        1 Reply Last reply
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                                        • D Offline
                                          D Offline
                                          DTR+NSR
                                          wrote on last edited by
                                          #92

                                          Yeah, it's a earlier jc20 aswell, which has more aggressive porting than the later jc22 foxeye. Most it's done is just under the ton on the clocks, at the redline in 6th. It's funny cuss in the 125 sports bike world the nsr is regarded as one of the slower bikes. I'd have loved a crm though, just there so thin on the ground.

                                          1 Reply Last reply
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