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basic tuning for four strokes

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  • basic tuning for four strokes

    what i gather is everyone is wary of opening the engine or using high comp.pistons or heads.so the best way of better performence is rejetting the main jet and start by using a 5 num.bigger jet.and go on increasing the jet size by 5 till u get a good setup.if for eg. u go from 115 to 130+ than u need a more unrestricted air filter.also any thing more than 135 u need a bigger pilot jet as well,also turn in air screw a bit to make mixture bit richer and than take it out based on ur feeling of power.gettin'jets is not easy but in delhi u can.this is for better mid and top end.combine this with a front sporcket one teeth smaller for low end.i feel this is most economic and easily done tuning.
    \'87 High Torque RD 350B
    in first gear,6000 rpm,whack the throttle.

  • #2
    CAN A NORMAL MECHANIC DO THESE KINDS OF MODS. ON THE BIKE ??
    CAN I BUY THESE JETS FROM A LOCAL BAJAJ DEALER ??

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    • #3
      well the jets will be of a diff.bikes but will work well.on RD's we use rx 135 jets.that's ok.these r basic mods which can be done by u at home.just need to learn how to open carb.imagine me opening 2 carbs and in end spending time syncronizing them together.or a 350 won't perform.jets can be bought from spare shops.u need info on which bike uses what size main jet.mech.i doubt even know how jets work.ask all the members to post main jet sizes of different bikes.
      \'87 High Torque RD 350B
      in first gear,6000 rpm,whack the throttle.

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      • #4
        THANKS DUDE
        I WILL ASK THEM

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        • #5
          Also fitting a dual silencer or a free flow is not that effective on a 4stroke as its on a 2stroke..what u say guys?
          2000 Suzuki Fiero | 2004 Bullet Electra | 2004 RX135 | 2005 CBZ | 2009 Karizma | 2009 Punto 1.4 Petrol | 2011 Yamaha YZF-R15

          Nav is back !!!
          Getting Leh'ed. Since 2007...

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          • #6
            YES I AGREE ITS NOT AS EFFECTIVE AS ON THE 2 STROKES BUT IT DEFINITELY ENHANCES THE LOOKS OF THE BIKE !!
            A P180 WITH A DUAL SILENCER LOOKS MIND BLOWING !!
            SO DOES A CBZ

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            • #7
              extra weight no good..
              Feuer Frei
              http://img.photobucket.com/albums/v3...mann/honda.gifhttp://img.photobucket.com/albums/v3...nner/yummy.gif

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              • #8
                I KNOW THE EXTRA WEIGHT IS NOT GOOD
                ONE OF MY FRIEND GOT AN EXTRA SILENCER ON HIS CBZ AND HAD BIG TIME PROBLEMS
                HIS BIKE WOULD WOBBLE ABOVE 60 AND HE HAD TO GET RID OF THE EXTRA WEIGHT IMMEDIATELY !!
                IT AINT GREAT !!

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                • #9
                  yeah moksh... u know i got the silencer put upon the left side and couldn't ride above 60 kmph.. had to take it out man. hey lets check out this jet and stuff sounds intresting.

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                  • #10
                    YES SURELY IT DOES
                    EVEN I HAVE BEEN THINKING ABOUT THIS JETS AND STUFF AFTER I READ IT !1
                    ITS INTERESTING AND LETS SEE IF IT DOES ANY GOOD TO OUR MACHINES !!

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                    • #11
                      i suggest u go for a front sprocket change.
                      Feuer Frei
                      http://img.photobucket.com/albums/v3...mann/honda.gifhttp://img.photobucket.com/albums/v3...nner/yummy.gif

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                      • #12
                        jetting is most common performence mod anywhere in the world.but pardon ur mechs. as they can't spell their names right forget talking bout jets.please ask ur mech to explain to u diff.in 2st and 4st engines and u'll get some nice answers LOL.jetting is not a big deal.guys know ur engine and carbs.nothing major in them.
                        \'87 High Torque RD 350B
                        in first gear,6000 rpm,whack the throttle.

                        Comment


                        • #13
                          rajinsh can u give a diagram of the crab used in a p180... wid all its parts??
                          Feuer Frei
                          http://img.photobucket.com/albums/v3...mann/honda.gifhttp://img.photobucket.com/albums/v3...nner/yummy.gif

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                          • #14
                            sorry can't as i don't own a pulser.see your owner's manual should explain about the carb.or once u can go to a mech ask him to explain bout the carb and then u can work on.there is nothing to go wrong as u r just putting jets and setting the air screw.but if u change the filter to a free flow one u need to be careful that the filter should not let dust pass through it.just open the carb once or make the mech open it once in ur presence and ask bout every part.
                            \'87 High Torque RD 350B
                            in first gear,6000 rpm,whack the throttle.

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                            • #15
                              okkies.....and can u tell me the correct screw setting for the pulsar//??? like when will i get more power and when will i get lesser power.
                              Feuer Frei
                              http://img.photobucket.com/albums/v3...mann/honda.gifhttp://img.photobucket.com/albums/v3...nner/yummy.gif

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