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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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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #9

    Yeah, they are around the 35 BHP mark. They are totally savage.

    So I would expect the DT would have more torque with the extra cc's.

    But It won't matter once the EXC gets going it's just going to decimate the DT. It's everything, it's 20kg lighter, it's virtually got no flywheel. It's a full bred race bike so everything is just better spec.

    Enjoy a comfortable ride pooting around on a reliable dt though.

    It's not all about power.

    Always Originate, Never Pirate!

    NINJAN 1 Reply Last reply
    2
    • DartyD Offline
      DartyD Offline
      Darty
      wrote on last edited by
      #10

      Ffs, anyone actually riden one??!

      EXC. Win.

      Sooo much faster !

      Keep it real

      NINJAN 1 Reply Last reply
      1
      • CalumC Calum

        Yeah, they are around the 35 BHP mark. They are totally savage.

        So I would expect the DT would have more torque with the extra cc's.

        But It won't matter once the EXC gets going it's just going to decimate the DT. It's everything, it's 20kg lighter, it's virtually got no flywheel. It's a full bred race bike so everything is just better spec.

        Enjoy a comfortable ride pooting around on a reliable dt though.

        It's not all about power.

        NINJAN Offline
        NINJAN Offline
        NINJA
        wrote on last edited by
        #11

        @calum AAAHHH right race bike, a bit like the MX/RS Rotax engined bikes? 😉 😉

        The lighter weight would make a big difference, but only if the riders body weights was evenly matched. I seem to remember reading somewhere that a full power DT was 28BHP, is that not correct ???

        Wouldn't the extra torque give it more grunt aka pulling power at higher RPM's tho ???

        SEDUCED BY THE DARK SIDE!!!

        CalumC 1 Reply Last reply
        0
        • DartyD Darty

          Ffs, anyone actually riden one??!

          EXC. Win.

          Sooo much faster !

          NINJAN Offline
          NINJAN Offline
          NINJA
          wrote on last edited by
          #12

          @darty LOL 😆

          As @Calum stated "About 40 hours to a rebuild", man that would make it a weekend rider only for-sure !!!

          SEDUCED BY THE DARK SIDE!!!

          1 Reply Last reply
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          • NINJAN NINJA

            @calum AAAHHH right race bike, a bit like the MX/RS Rotax engined bikes? 😉 😉

            The lighter weight would make a big difference, but only if the riders body weights was evenly matched. I seem to remember reading somewhere that a full power DT was 28BHP, is that not correct ???

            Wouldn't the extra torque give it more grunt aka pulling power at higher RPM's tho ???

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

            @ninja The DT is no where near that. 15 BHP Stock. And as our dear friend from overseas found out, a highly strung Belgarda made 24-25bhp on the dyno quite recently.

            The MX/RS engines...yes and no.

            Yes, they are Rotax 122 Go Kart Engines. But they are detuned for the Road. But Aprilia sell GP kits to bolt on and make them full power. But they are far from it stock. Around the 26bhp mark from new.

            Always Originate, Never Pirate!

            Irongamer727I 1 Reply Last reply
            0
            • CalumC Calum

              @ninja The DT is no where near that. 15 BHP Stock. And as our dear friend from overseas found out, a highly strung Belgarda made 24-25bhp on the dyno quite recently.

              The MX/RS engines...yes and no.

              Yes, they are Rotax 122 Go Kart Engines. But they are detuned for the Road. But Aprilia sell GP kits to bolt on and make them full power. But they are far from it stock. Around the 26bhp mark from new.

              Irongamer727I Offline
              Irongamer727I Offline
              Irongamer727
              wrote on last edited by
              #14

              @calum surely a destricted Dt with stock exhaust will have around 20 bhp. I think with the Athena and performance exhaust your looking at roughly 30 bhp.

              CalumC 1 Reply Last reply
              0
              • Irongamer727I Irongamer727

                @calum surely a destricted Dt with stock exhaust will have around 20 bhp. I think with the Athena and performance exhaust your looking at roughly 30 bhp.

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

                @irongamer727 No, nowhere near 30 bhp.

                Those Athena kits are poor. Two strokes work best with square engines. Throwing a big bore on it just makes it overly square, same thing with the old dt mx 125 175, practically same engine, bigger bores.

                So what do you get. Well you lose over rev for starters. You lose the ability to obtain high peaky power. Instead you exchange that tor torque, as I already said, it will probably have more torque.

                But it's not enough. In race engines, torque is only good on slow twisty tracks.

                Once the engine is spun up, the inertia is going to help move it along. With the KTM, sure it'll lack low down grunt, but who races at 6k on a two stroke. No the engine will be maxxed out to 14k and will decimate the dt.

                I'm not saying torque isn't important, as it most definitely is. The exc doesn't lack torque. But the extra torque gained from the Athena won't help it beat an EXC. You will just have to ride one to really understand.

                Always Originate, Never Pirate!

                1 Reply Last reply
                0
                • MiniaM Offline
                  MiniaM Offline
                  Minia
                  wrote on last edited by
                  #16

                  exc will win without a doubt, the DT might be faster off the line with the extra torque but it is also much heavier, I can't honestly tell which would be faster. However it's only a matter of a few seconds before that top end power kicks in and pushes the exc well past the DT. An exc is a 2-stroke enduro bike, it has weight and power on its side. Anyone who's ever ridden a 125 enduro bike should know the exc will kick the DTs arse.

                  Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

                  1 Reply Last reply
                  0
                  • terry.tzT Offline
                    terry.tzT Offline
                    terry.tz
                    wrote on last edited by
                    #17

                    with a 170 kit on it could you not put a smaller sprocket on it for more top end then it would match the exc I mean I feel that it would be a waste but the 170 is a waste, to begin with in my opinion

                    "Muddy water is best cleared by leaving it alone" Alan Watts

                    S 1 Reply Last reply
                    0
                    • NINJAN Offline
                      NINJAN Offline
                      NINJA
                      wrote on last edited by NINJA
                      #18

                      I guess it's a choice between max power or daily rider? Weekend Warrior or Steady Eddy??? LOL 😉

                      SEDUCED BY THE DARK SIDE!!!

                      1 Reply Last reply
                      0
                      • J Offline
                        J Offline
                        Jens Eskildsen
                        wrote on last edited by
                        #19

                        Im pretty sure the excs are restricted for emmissions, I belive the dealer adds another exhaust at purchase.

                        CalumC 1 Reply Last reply
                        0
                        • J Jens Eskildsen

                          Im pretty sure the excs are restricted for emmissions, I belive the dealer adds another exhaust at purchase.

                          CalumC Offline
                          CalumC Offline
                          Calum
                          wrote on last edited by
                          #20

                          @jens-eskildsen Again, it's an Enduro, they are not made for road use. So why woud they be restricted for emmisions. You may be riht. But I don't think they are.

                          Always Originate, Never Pirate!

                          MiniaM 1 Reply Last reply
                          0
                          • terry.tzT terry.tz

                            with a 170 kit on it could you not put a smaller sprocket on it for more top end then it would match the exc I mean I feel that it would be a waste but the 170 is a waste, to begin with in my opinion

                            S Offline
                            S Offline
                            scrimsmustang
                            wrote on last edited by
                            #21

                            @terry-tz said in Dt170 vs ktm exc 125:

                            with a 170 kit on it could you not put a smaller sprocket on it for more top end then it would match the exc I mean I feel that it would be a waste but the 170 is a waste, to begin with in my opinion

                            A DTR with 170 Athena kit is no match for a 125EXC from a standing start the KTM will be in 3rd gear and away before the DT is even moving. I remember years ago my mate had an RE with one and he thought that it would be as fast as my old 2007 RM125 enduro spec. He soon found out that he might aswell of had a boat anchor on the DT lol

                            alt text

                            1 Reply Last reply
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                            • CalumC Calum

                              @jens-eskildsen Again, it's an Enduro, they are not made for road use. So why woud they be restricted for emmisions. You may be riht. But I don't think they are.

                              MiniaM Offline
                              MiniaM Offline
                              Minia
                              wrote on last edited by
                              #22

                              @calum You forget an Enduro is road legal, it must meet the conditions and laws required to go on the road. However, Enduro bikes are not always required to follow emissions regulations, that mostly depends on what country and region you are in. For example, in Auverge (france) where I ride, enduro bikes have to follow the Euro 3 or 4 EU regulations depending on their model year. Enduros are not made for a track, they are designed to go on a set course not normally shorter than 10 miles that generally at certain points requires you to go on the road, mostly when crossing from one trail to another. So you saying Enduros aren't made to go on the road is not strictly true.

                              Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

                              CalumC 1 Reply Last reply
                              0
                              • MiniaM Minia

                                @calum You forget an Enduro is road legal, it must meet the conditions and laws required to go on the road. However, Enduro bikes are not always required to follow emissions regulations, that mostly depends on what country and region you are in. For example, in Auverge (france) where I ride, enduro bikes have to follow the Euro 3 or 4 EU regulations depending on their model year. Enduros are not made for a track, they are designed to go on a set course not normally shorter than 10 miles that generally at certain points requires you to go on the road, mostly when crossing from one trail to another. So you saying Enduros aren't made to go on the road is not strictly true.

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #23

                                @minia Again. I'm no expert, but pretty sure Enduro isn't desgined for road use. It's desgined for byways that cross roads and therefore should have the ability to be made road legal.

                                This differs as KTM sell road legal "kits" for their EXC but it's optional whether you want it. Therefore, you can buy EXC's which are not road legal.

                                It's not a road going production bike, therefore the same rules do not apply to it.

                                To the best of my knowledge, the EXC is a race bred engine, designed not for MX but for enduro use. You can assume then, there would be no restrictions.

                                As Scrim says, night and day due to the DT being a road going plodder.

                                Always Originate, Never Pirate!

                                MiniaM 1 Reply Last reply
                                0
                                • O Offline
                                  O Offline
                                  oldman
                                  wrote on last edited by
                                  #24

                                  Perfectly happy with my road going plodder. Hopefully not have to rebuild engine for a long time, it's fast enough for me and I will not be a tit on it and get myself into danger. Done the speed thing and still have my 650 anyway but pretty much unused for a while now. No doubt the KTM will trounce the Dt but personally could not put up with keeping it on song on a regular basis. If I did enduros mind that is a different matter, but I don't. Did consider a 170 kit when I started rebuilding the 88 but in the end could not see the point, would only be trying to make it something it's not, more isn't always better. On a completely different note I was a complete tit today when I fuelled up with BP's finest diesel in the tank of the 125 mx I bought from scrim, had loads of nuns running after me thinking the Pope had died! Made it back home but bloody funny, don't think I will be getting the Nobel peace prize for the environment. All drained and fresh fuel put in, back to normal and had a decent ride around in the sunshine this afternoon.

                                  CalumC 1 Reply Last reply
                                  1
                                  • O oldman

                                    Perfectly happy with my road going plodder. Hopefully not have to rebuild engine for a long time, it's fast enough for me and I will not be a tit on it and get myself into danger. Done the speed thing and still have my 650 anyway but pretty much unused for a while now. No doubt the KTM will trounce the Dt but personally could not put up with keeping it on song on a regular basis. If I did enduros mind that is a different matter, but I don't. Did consider a 170 kit when I started rebuilding the 88 but in the end could not see the point, would only be trying to make it something it's not, more isn't always better. On a completely different note I was a complete tit today when I fuelled up with BP's finest diesel in the tank of the 125 mx I bought from scrim, had loads of nuns running after me thinking the Pope had died! Made it back home but bloody funny, don't think I will be getting the Nobel peace prize for the environment. All drained and fresh fuel put in, back to normal and had a decent ride around in the sunshine this afternoon.

                                    CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #25

                                    @oldman How, how did you manage that.

                                    No I totally agree. I kid you not. I have had more fun on my DT doing 30 mph round roads near me, than full chat on it.

                                    Or on my brothers YZ.

                                    Obviously, when you take into account bigger bikes, whoopied do dah it's a 125 and I have an R1. Obviously no competition. But it is very impressive what they get out of it to say the least.

                                    Always Originate, Never Pirate!

                                    1 Reply Last reply
                                    0
                                    • CalumC Calum

                                      @minia Again. I'm no expert, but pretty sure Enduro isn't desgined for road use. It's desgined for byways that cross roads and therefore should have the ability to be made road legal.

                                      This differs as KTM sell road legal "kits" for their EXC but it's optional whether you want it. Therefore, you can buy EXC's which are not road legal.

                                      It's not a road going production bike, therefore the same rules do not apply to it.

                                      To the best of my knowledge, the EXC is a race bred engine, designed not for MX but for enduro use. You can assume then, there would be no restrictions.

                                      As Scrim says, night and day due to the DT being a road going plodder.

                                      MiniaM Offline
                                      MiniaM Offline
                                      Minia
                                      wrote on last edited by
                                      #26

                                      @calum I'm not sure where you get your information from, Enduros are in almost all cases road legal. They aren't designed for the road but for trails and endurance courses as you say but they are allowed on the road as long as they have a headlight with dip and full beam, a rear brake light and 2 independant braking systems and meet all the technical and boring requirements. After that its a question of passing any technical inspections, being insured etc.

                                      As for the exc, it is a road legal bike. Even if you buy one factory new, it's just a question of getting it registered and insured. However, I do know that the xcw is not an homologated bike despite being an enduro. As to how, well I'm not sure.

                                      Also, KTM themselves never sold a "road legal kit", but I know they once sold what you could call extension kits for their crossers and enduro bikes. Which basically was a spare headlight and a larger tailplate attachment and indicators.

                                      And you are correct, the exc is a race bred engine. It is in fact almost the exact same engine in the exc as the sx models. However Enduro bikes have much longer gearing than crossers. And some enduro bikes have even longer gearing.

                                      Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

                                      1 Reply Last reply
                                      0
                                      • O Offline
                                        O Offline
                                        oldman
                                        wrote on last edited by
                                        #27

                                        Didn't have my brain with me at the fuel station, started chugging and the massive clouds behind me suggested I had made an error! Never misfuelled before, put it down to my stupidity gene kicking in, did stop the car tailgating me up the hill though, bit like a secret weapon

                                        S 1 Reply Last reply
                                        1
                                        • O oldman

                                          Didn't have my brain with me at the fuel station, started chugging and the massive clouds behind me suggested I had made an error! Never misfuelled before, put it down to my stupidity gene kicking in, did stop the car tailgating me up the hill though, bit like a secret weapon

                                          S Offline
                                          S Offline
                                          scrimsmustang
                                          wrote on last edited by scrimsmustang
                                          #28

                                          KTM EXC 2strokes comes with everything to make it fully street legal when you buy it new, indicators mirrors chainguard rear tailight with numberplate hanger rear reflector the lot all in the spares package along with some taller sprockets. The 2strokes do indeed come with a restricted exhaust even the 300,s do new. You also get a derestricted exhaust new in the spares package. The 125EXC engine is more or less the same engine as an SX but has taller ratios and slightly different suspension. The XC 2strokes "cant get a 125" have better suspension better gearbox, but come with lighting coil loom and electric start like the EXC so lights speedo etc are plug and play if you want it street legal.

                                          My 2011 250XC 2stroke bought new road registered from new before I had even put all the lights on etc myself. Bare minimum trailtech horn dipbeam headlight front rear hydrolic brakelight switches.
                                          alt text

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