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RX 135 4s vs RX 135 5s vs RXZ 5s

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  • #1

    RX 135 4s vs RX 135 5s vs RXZ 5s

    Hey guys,

    This is my first post in xbhp and after a lot of research through the forums i realized the need for this.

    I am looking at listing out all the differences between the RX 135 4 speed, RX 135 5 speed and RXZ 5 speed.

    So far as of my understanding and assumptions (plz correct me if I am wrong):
      • 135 5s and RXZ 5s have the exact same head bore (4TL10)and gear box where as the 4s has a smaller headbore (4TL00)
      • All the 3 bikes have the exact same engine ie crank, flywheels, engine bearings etc.
      • RX 135 4s has a smaller rear sprocket where as RX 135 5s & RXZ 5s have a 35-15 sprocket setup
      • All 3 came with the same cat con silencers or are they different??
      • RX 135 4s & RX 135 5s have different tanks even though they look the same, the fuel hole is round in 4s and oval in 5s.
      • The engine (clutch) covers on either side of the 5s vehicles are different from the 4s vehicle, and this is done for??
      • Electricals - are the different??
      • Carburettors - are they different, i think 5s have different ones.??
      • Chasis of the RXZ and the 135s are different.


    Well thats what comes to my mind as of now.. plz add if I have missed out anything and correct if any of my listings are wrong.

    Once we have a list in place, I would also like to know if by fixing the differences can we convert a 135 4 speed to a stock 135 5 speed to perform as good as a company fitted original 5 speed?

    Thanks in advance ..

    Armin
    Tags: rx 135 4 speed, rx 135 5 speed, rxz 5 speed
  • #2
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    • #3
      AFAIK,

      135 5s and the 5s Z are near identical in - They both have the same bore-piston-head-carburetor. Carb is 4TL4 20 for the 5speed.

      And there are those who will claim the 5speed Z had a different CatCon to the 135 5S..... AFAIK its just speculation. Its the same catcon on both bikes I believe. 14BHP.


      135 4S has a different bore piston head kit and a diff carb 4TL4 00 . 12 BHP.

      Sprockets its 16 34 for the 4speed and 15 38 for the 5 speed I believe.


      And yes you can get a 4Speed into a 5 speed by purchasing the entire gearbox kit and getting a 4sp bore piston kit. You can still use the same 4speed carb and get a rx100 shaved head or mod the existing 4s head to bump up the compression. Get a 5speed chain sprkt set as well. Getting a 5s carb or head is almost impossible I guess.
      Last edited by Sandeep_K_Ram; 04-17-2010, 09:20 AM.
      Sandeep K Ram blogs at

      http://sandeepkram.blogspot.com

      Comment

      • #4
        ^^ Pretty much summed it up.

        You can find some 2002 and later RX135 5 speeds, which were 12.5 bhp, not the 14.5 bhp models.


        My offerings to the gods of speed -

        - KTM Duke 200
        - Yamaha RXZ 5 speed


        Comment

        • #5
          So how much difference is there between the RXZ and 135's chassis? Any particular advantages of one over the other?

          Are both the engines in the same state of tune , HP-wise? Also, any gear ratio differences?

          I was looking out for a Z for a long time but if there is not much difference from a 135 then I might as well pick up a 135. Opinions?
          200 | 300 | 1200 BOXER

          Comment

          • #6
            Originally posted by arminbaig View Post
            Hey guys,

            This is my first post in xbhp and after a lot of research through the forums i realized the need for this.

            I am looking at listing out all the differences between the RX 135 4 speed, RX 135 5 speed and RXZ 5 speed.

            So far as of my understanding and assumptions (plz correct me if I am wrong):
              • 135 5s and RXZ 5s have the exact same head bore (4TL10)and gear box where as the 4s has a smaller headbore (4TL00)
              • All the 3 bikes have the exact same engine ie crank, flywheels, engine bearings etc.
              • RX 135 4s has a smaller rear sprocket where as RX 135 5s & RXZ 5s have a 35-15 sprocket setup
              • All 3 came with the same cat con silencers or are they different??
              • RX 135 4s & RX 135 5s have different tanks even though they look the same, the fuel hole is round in 4s and oval in 5s.
              • The engine (clutch) covers on either side of the 5s vehicles are different from the 4s vehicle, and this is done for??
              • Electricals - are the different??
              • Carburettors - are they different, i think 5s have different ones.??
              • Chasis of the RXZ and the 135s are different.



            Well thats what comes to my mind as of now.. plz add if I have missed out anything and correct if any of my listings are wrong.

            Once we have a list in place, I would also like to know if by fixing the differences can we convert a 135 4 speed to a stock 135 5 speed to perform as good as a company fitted original 5 speed?

            Thanks in advance ..

            Armin
            Nice post there armin, a good sum up
            http://www.youtube.com/watch?v=yjWXI8T2HUM
            ---------------------------
            07' Pulsar 200 DTS-i
            99' Suzuki Shaolin
            85' Royal Enfield Bullet 350 (Sold)
            86' Ind-Suzuki Ax 100 (Sold)
            03' HH Splendor

            Comment

            • #7
              @tanay - the chassis differ for the design of the rear end for mounting the tail lights and the seat and tank design. Rest everything is common to the RX family no difference.

              The RXZ 5 speed has slightly longer front fork legs, but thats accomodated in the front steering stem, which is longer, and needs a metal bush at the top.


              My offerings to the gods of speed -

              - KTM Duke 200
              - Yamaha RXZ 5 speed


              Comment

              • #8
                hmmmm,
                and clutch bell and Primary drive ratio!!!!!

                Comment

                • #9
                  The clutch and primary drive ratios are same for all expect RXG.
                  "Engine tuning is not an exact science, but with some practice and patience you'll get comfortable with your skill and be able tune for any conditions mother nature throws at you"


                  Still the Boss -- RX 135

                  Comment

                  • #10
                    Clutch bell , gear ratio etc ...everything same man.

                    Only change between 135 5 speed and the Z 5s is the bodyline and stuff like discs etc. Mechanically its near identical AFAIK.

                    Yes- since they are the same ...it makes sense for ppl to buy a half decent 135s and spend money on rebuilding it rather than fall for the "Z" factor and buy a shagged Z 5s for 40K+.
                    Sandeep K Ram blogs at

                    http://sandeepkram.blogspot.com

                    Comment

                    • #11
                      my bad, lost in names....
                      in case of rxg it was 22, others use 19.....

                      Comment

                      • #12
                        Originally posted by Sandeep_K_Ram View Post
                        Clutch bell , gear ratio etc ...everything same man.

                        Only change between 135 5 speed and the Z 5s is the bodyline and stuff like discs etc. Mechanically its near identical AFAIK.

                        Yes- since they are the same ...it makes sense for ppl to buy a half decent 135s and spend money on rebuilding it rather than fall for the "Z" factor and buy a shagged Z 5s for 40K+.

                        i beg to differ. a Z is a Z. The styling and looks has its own charm..


                        My offerings to the gods of speed -

                        - KTM Duke 200
                        - Yamaha RXZ 5 speed


                        Comment

                        • #13
                          A Z is a Z ... a 135 is a 135 .... cosmetically. We were talking about whats beneath the skin ... its an established fact that people who buy the Z even after knowing the facts are just buying it for its "charm" ... that was not being argued.
                          Sandeep K Ram blogs at

                          http://sandeepkram.blogspot.com

                          Comment

                          • #14
                            z is beauty .the best looking in indian 2strokes bikes.

                            Comment

                            • #15
                              Nilay

                              Hey Armin and sandeep,
                              good work for giving us information about RX series. I am also working on my rx 135 4s (2000 model) which has clocked over 100000 km and it does not give me any trouble since now. But the power of engine is not as good as 10 year ago. it loses its power-band in higher RPM.

                              I have to convert my RX 4s 12BHP to RX 5s 14 BHP. So i have made a list of parts to be changed.

                              1. 5 speed gear box kit
                              2. 20 or 22 mm mikuni slide type carb. (required information about main jet and pilot jet)
                              3. new sprocket (front & rear)
                              4. new cylinder head of 5s, New piston
                              5. i don't know weather i have to change cylinder block or not.....??
                              6. i am not sure about changing crank case cover........
                              7. my bike has old silencer which has very racy sound and i don't want to change it. so is it works well with new cylinder of 5s........?
                              8. is there any difference between connecting rod of 4s and 5s.......?

                              any suggestion will be welcomed.

                              ----------------------------------
                              -Yamaha R15
                              -Yamaha RX135
                              -Royal Enfield Machismo A350
                              Yamaha RX-135 BLACKBIRD
                              Royal Enfield Machismo A350 sold
                              Hero Impulse
                              Yamaha R15
                              Honda Activa sold
                              Honda Dio

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