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DT125R FORUM

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  2. Tuning
  3. Carburetor
  4. Jets

Jets

Scheduled Pinned Locked Moved Carburetor
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  • V Offline
    V Offline
    vtrn_raptor
    wrote on last edited by
    #1

    What size jets people running on full dep cause my bike seems to be lacking petrol in higher gears

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    0
    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      210 was absolutely fine for my DTRE, snorkel in golden brown plug.

      When I ran a Wossner piston I needed to take the jet up to 270 to get it running sweet.

      It all depends on the build.

      Have you any mods?

      Always Originate, Never Pirate!

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      • V Offline
        V Offline
        vtrn_raptor
        wrote on last edited by
        #3

        Just a dep and pinned pv was 240 standard so thinking I should take it up to 250

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        • CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #4

          Well I'd sort the powervalve out for starters.

          It's just going to be losing fuel through the exhaust system otherwise.

          That might be why you're having problems.

          This added heat won't help things either

          Always Originate, Never Pirate!

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          • V Offline
            V Offline
            vtrn_raptor
            wrote on last edited by
            #5

            Sorting the pv is way to expensive bikes stands me in over £2000 already Lol gunna change the jets and the reeds see if that helps as haven't got the money to fix the pv

            CalumC 1 Reply Last reply
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            • V vtrn_raptor

              Sorting the pv is way to expensive bikes stands me in over £2000 already Lol gunna change the jets and the reeds see if that helps as haven't got the money to fix the pv

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

              @vtrn_raptor Well you're ignoring the problem then aren't you a little?

              You could end up chucking money on it unnecessarily when all you needed to do was fix the powervalve?

              240 jet on full dep is fine. So unless there are any other mods then I think you probably won't fix the problem just chucking jets at it. Just means you'll be wasting more fuel.

              Always Originate, Never Pirate!

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              • V Offline
                V Offline
                vtrn_raptor
                wrote on last edited by
                #7

                I won't to sort it but I don't no what the problem is with the pv I changed the servo and that wasn't the problem and a cdi is £200

                declanD 1 Reply Last reply
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                • V vtrn_raptor

                  I won't to sort it but I don't no what the problem is with the pv I changed the servo and that wasn't the problem and a cdi is £200

                  declanD Offline
                  declanD Offline
                  declan
                  wrote on last edited by
                  #8

                  @vtrn_raptor well surely it's cheaper to fix the pv rather than waiting for it to seize or something

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                  • V Offline
                    V Offline
                    vtrn_raptor
                    wrote on last edited by
                    #9

                    Yeah true

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                    • A Offline
                      A Offline
                      andrewj1680
                      wrote on last edited by
                      #10

                      Cant see pinning the pv would be a issue mine 95 model didnt come with a servo and the pv is pinned wide open on that and its covered 600 miles in the last 3wks with not a single problem

                      declanD 1 Reply Last reply
                      0
                      • A andrewj1680

                        Cant see pinning the pv would be a issue mine 95 model didnt come with a servo and the pv is pinned wide open on that and its covered 600 miles in the last 3wks with not a single problem

                        declanD Offline
                        declanD Offline
                        declan
                        wrote on last edited by
                        #11

                        @andrewj1680 no maybe it won't but it's designed to have a working powervalve so you can't expect it to run perfect if one piece of the puzzle is missing

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                        • A Offline
                          A Offline
                          andrewj1680
                          wrote on last edited by
                          #12

                          0_1498078902794_20170621_220101.jpg
                          Ok so i have a S reg here that ive bought to rebuild the pv as you can see has been pinned it pulls nice and strong every gear to the point it comes off the clock yet i dont have the same issues as above and the only difference is i have a standard front pipe

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                          • V Offline
                            V Offline
                            vtrn_raptor
                            wrote on last edited by
                            #13

                            My last one ran perfect with pinned pv to and had a 170 on it this ones only been doing this since I rebuilt it and put a dep on it

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                            • CalumC Offline
                              CalumC Offline
                              Calum
                              wrote on last edited by
                              #14

                              Well it's always to get the bike completely stock before diagnosing problems.

                              Bike is always going to run better with Powervalve

                              Don't see why you wouldn't run one.

                              Always Originate, Never Pirate!

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                              • A Offline
                                A Offline
                                andrewj1680
                                wrote on last edited by
                                #15

                                Totally different bike to ride without, the powervalve hits so much harder when it kicks in, the servo just smoothes out the power delivery i think but definitely prefer it without but each to their own i guess

                                CalumC 1 Reply Last reply
                                0
                                • V Offline
                                  V Offline
                                  vtrn_raptor
                                  wrote on last edited by
                                  #16

                                  The problem is the exhaust was perfectly fine before I did the rebuild power valve kicks in perfect up to third 4ths sluggish 5-6 no power at all starts to die same thing happens on peds if theirs not enough fuel it won't pull

                                  1 Reply Last reply
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                                  • A andrewj1680

                                    Totally different bike to ride without, the powervalve hits so much harder when it kicks in, the servo just smoothes out the power delivery i think but definitely prefer it without but each to their own i guess

                                    CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #17

                                    @andrewj1680 Absolutely mate.

                                    No arguments there, it's an absolute riot with the powervalve switched off.

                                    But the bike performs much better with the valve.

                                    It's why I like old school vtec civics, the ragging factor haha

                                    Always Originate, Never Pirate!

                                    declanD 1 Reply Last reply
                                    0
                                    • CalumC Calum

                                      @andrewj1680 Absolutely mate.

                                      No arguments there, it's an absolute riot with the powervalve switched off.

                                      But the bike performs much better with the valve.

                                      It's why I like old school vtec civics, the ragging factor haha

                                      declanD Offline
                                      declanD Offline
                                      declan
                                      wrote on last edited by
                                      #18

                                      @Calum so is it better with it pinned or what?

                                      CalumC 1 Reply Last reply
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                                      • declanD declan

                                        @Calum so is it better with it pinned or what?

                                        CalumC Offline
                                        CalumC Offline
                                        Calum
                                        wrote on last edited by
                                        #19

                                        @declan More performance with the servo, much more fun with it pinned.

                                        Always Originate, Never Pirate!

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                                        • J Offline
                                          J Offline
                                          Jens Eskildsen
                                          wrote on last edited by
                                          #20

                                          The reason it feels better in the top with the PV pinned is because the difference between lowend and topend is bigger. The bike is really sluggish in the low revs.

                                          With a prperworking PV, you get the best of both worlds, and going WOT in high revs, theres no part of the PV visible in the exhaust port, so no restriction at all.

                                          CalumC 1 Reply Last reply
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