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DT125R FORUM

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  3. 2 stroke dB killers

2 stroke dB killers

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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #3

    Unlike four stroke note, the two stroke sound wave doesn't carry. The lower pitch of the four stroke carries further. I know a lot of MX tracks were getting complaints when two strokes got replaced with four strokes. The high frequencies of the two stroke engine are high energy and dissipate quicker.

    Always Originate, Never Pirate!

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    • F Offline
      F Offline
      finnerz89
      wrote on last edited by
      #4

      My DT sounds really loud to me riding it, but like @Calum says, it doesn't carry. I've seen videos of me riding past someone and you can barely hear the bike lol

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

      Previous:
      DR650RSE '96
      FJ1200 '92

      declanD 1 Reply Last reply
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      • F finnerz89

        My DT sounds really loud to me riding it, but like @Calum says, it doesn't carry. I've seen videos of me riding past someone and you can barely hear the bike lol

        declanD Offline
        declanD Offline
        declan
        wrote on last edited by
        #5

        I’m talking 250mx bikes lads mines has almost a 2 foot long muffler and it’s loud as tits

        CalumC 1 Reply Last reply
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        • declanD declan

          I’m talking 250mx bikes lads mines has almost a 2 foot long muffler and it’s loud as tits

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

          @declan But that's a crosser. Is there a powervalve? is it leaking?

          Always Originate, Never Pirate!

          declanD 1 Reply Last reply
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          • CalumC Calum

            @declan But that's a crosser. Is there a powervalve? is it leaking?

            declanD Offline
            declanD Offline
            declan
            wrote on last edited by declan
            #7

            @Calum the only thing I’m suspect of is the header is a little mangled and I’ve tried to unbend it but not managed much, it sits in the exhaust outlet at an angle thinking of it it’s obviously my problem but I had the same thing on the dt and that wasn’t louder

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            • 2 Offline
              2 Offline
              2stroketerry
              wrote on last edited by
              #8

              2 stroke silencers are the simplest design of any silencer known to man, there is just a tube running straight through with lots of holes. If you could be bothered just drill every hole 1mm larger than they are and the best sound absorbing material is fibreglass loft insulation cut to the length of the perforated tube then roll tightly around to thickness of silencer. As you can see I went the complete opposite.lol
              0_1541610069085_1 (2).jpg

              declanD 1 Reply Last reply
              1
              • 2 2stroketerry

                2 stroke silencers are the simplest design of any silencer known to man, there is just a tube running straight through with lots of holes. If you could be bothered just drill every hole 1mm larger than they are and the best sound absorbing material is fibreglass loft insulation cut to the length of the perforated tube then roll tightly around to thickness of silencer. As you can see I went the complete opposite.lol
                0_1541610069085_1 (2).jpg

                declanD Offline
                declanD Offline
                declan
                wrote on last edited by
                #9

                @2stroketerry haha that looks interesting for sure I think I’m gonna have to ask Santa for a pre owned header then re do the packing but as far as you know there’s no extra steps to make it quieter?

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                • 2 Offline
                  2 Offline
                  2stroketerry
                  wrote on last edited by
                  #10

                  No thats how every 2 srtoke silencer has always been made apart from most are welded up.

                  NINJAN 1 Reply Last reply
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                  • 2 2stroketerry

                    No thats how every 2 srtoke silencer has always been made apart from most are welded up.

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

                    @2stroketerry What was the outcome of your handiwork dude? Was the silencer quieter or something else???

                    SEDUCED BY THE DARK SIDE!!!

                    declanD 1 Reply Last reply
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                    • NINJAN NINJA

                      @2stroketerry What was the outcome of your handiwork dude? Was the silencer quieter or something else???

                      declanD Offline
                      declanD Offline
                      declan
                      wrote on last edited by
                      #12

                      @NINJA it would be louder as he’s covered up half the baffle holes so more of the sound travels directly out the pipe

                      NINJAN 1 Reply Last reply
                      1
                      • declanD declan

                        @NINJA it would be louder as he’s covered up half the baffle holes so more of the sound travels directly out the pipe

                        NINJAN Offline
                        NINJAN Offline
                        NINJA
                        wrote on last edited by
                        #13

                        @declan AAAHHH -:thumbs_up_light_skin_tone: Thank you for the insight.

                        SEDUCED BY THE DARK SIDE!!!

                        declanD 1 Reply Last reply
                        0
                        • NINJAN NINJA

                          @declan AAAHHH -:thumbs_up_light_skin_tone: Thank you for the insight.

                          declanD Offline
                          declanD Offline
                          declan
                          wrote on last edited by
                          #14

                          @NINJA just call me professor Dec

                          NINJAN 1 Reply Last reply
                          1
                          • declanD declan

                            @NINJA just call me professor Dec

                            NINJAN Offline
                            NINJAN Offline
                            NINJA
                            wrote on last edited by
                            #15

                            @declan MMMMMMMMMMMMMMMMMMMMM OK

                            SEDUCED BY THE DARK SIDE!!!

                            1 Reply Last reply
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