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Help:-Yamaha Rx 135

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  • #1

    Help:-Yamaha Rx 135

    Hii friends, i own a Yamaha Rx 135 1998 model
    I bikes top speed was 115 kmp/h,but recently i changed my bikes clutch plate and sprocket, but the original sprocket was not available so the mechanic fitted some desi sprocket. Now my bikes rpm decreased, my bike use to touch 80 in 3rd gear now it barely touches 70 kmp/h, and in 4th gear it dosent go beyond 100 km/hr. I told this problem to mechanic, he tuned the bike and told now you would have no problem in getting top speed of 115... but still my bikes barely touches 100 kmp/h. Please help
    When approaching a corner, stay on the gas until you see Jesus. Then brake HARD.
    Tags: None
  • #2
    Help Query Approved
    The Wheel was a great invention; Two Wheels with a Motor in between was even better!


    BMW Motorrad Days 2011

    Xbhp's Indo-French Kashmir-Ladakh Tour

    Comment

    • #3
      did you changed all the clutch plates or single plate only..Its better to change the pressure plate also...
      2>did you change your timing chain...
      3>or your chain is tight....
      4>and the main your chain desi sprocket is the problem which was installed by that idiot mechanic.....
      Ride Safe & Ride Long-->
      Zayn

      Comment

      • #4
        1998 model means its a 4speed. A RX135 4speed has a true top speed of 100kph. Indicated speed might be around 110-115.

        • Either your speedo was over-optimistic early on and is now showing properspeeds after wear and tear
        • The mechanic might have put in smaller sprocket to improve acceleration and that might have affected top end.


        I think you can start troubleshooting by looking at the following :

        • Check sprockets Fr and Rr - 4speed has 16/34 I believe - correct me if I am wrong.
        • Ensure that the chain-sprocket set is in good condition and that the play is adjusted properly and also that the chain is well lubed.
        • Check the clutch plates - if they are worn, it will affect performance.
        • Carb tuning - check the plug and get the carb tuned by a good mech.

        BTW - have you changed over to yezdi rims or something ? Coz switching to smaller rear rim will also affect top end.
        Sandeep K Ram blogs at

        http://sandeepkram.blogspot.com

        Comment

        • #5
          Originally posted by Sandeep_K_Ram View Post
          1998 model means its a 4speed. A RX135 4speed has a true top speed of 100kph. Indicated speed might be around 110-115.

          • Either your speedo was over-optimistic early on and is now showing properspeeds after wear and tear
          • The mechanic might have put in smaller sprocket to improve acceleration and that might have affected top end.


          I think you can start troubleshooting by looking at the following :

          • Check sprockets Fr and Rr - 4speed has 16/34 I believe - correct me if I am wrong.
          • Ensure that the chain-sprocket set is in good condition and that the play is adjusted properly and also that the chain is well lubed.
          • Check the clutch plates - if they are worn, it will affect performance.
          • Carb tuning - check the plug and get the carb tuned by a good mech.

          BTW - have you changed over to yezdi rims or something ? Coz switching to smaller rear rim will also affect top end.
          The 4 Speed Rx sprokets are of 16/37.... using 34 rear sproket will give you good low end but top speed will decrease. So do check that.
          And yes check the clutch plates and go for genuine ones and also change the pressure plates...
          And go to a decent mechanic...

          PERSEVERE... failure is not an option!

          '88 Premier Padmini | '99 Maruti 800 | '99 Yamaha RX135 | '10 Wagon R | '11 Yamaha FZ16

          Comment

          • #6
            Originally posted by blisteringintelligence View Post
            The 4 Speed Rx sprokets are of 16/37..
            Was this on a limited edition RX or some thing ""

            The RX 4 speed came with 16-34 sprockets from the factory.
            RXG was the only model in 4 speed with different sprocket sizes ( dont remember the sizes ) and with a different clutch bell.

            I clocked 118 on the gun with 16/34 sprockets and 110 on the gun with 16/38 sprockets, so tell me which sprocket size gave less top end.

            Originally posted by zayn View Post
            did you change your timing chain...

            Which rx had a timing chain my friend for your info rx is a 2 stroke
            Last edited by psycho 98; 08-26-2009, 02:47 PM.
            "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

            • #7
              Originally posted by psycho 98 View Post
              Was this on a limited edition RX or some thing ""

              The RX 4 speed came with 16-34 sprockets from the factory.
              RXG was the only model in 4 speed with different sprocket sizes ( dont remember the sizes ) and with a different clutch bell.
              My Rx135 has 16/37 and the bike is as stock as it can be..

              Originally posted by psycho 98 View Post
              I clocked 118 on the gun with 16/34 sprockets and 110 on the gun with 16/38 sprockets, so tell me which sprocket size gave less top end.
              Well i clocked 120 on 16/37 my bike and 110 on a friends bike with 16/34 (speedo figures)... So i commented on what i experienced...

              PERSEVERE... failure is not an option!

              '88 Premier Padmini | '99 Maruti 800 | '99 Yamaha RX135 | '10 Wagon R | '11 Yamaha FZ16

              Comment

              • #8
                Originally posted by blisteringintelligence View Post
                My Rx135 has 16/37 and the bike is as stock as it can be..
                OH my god !!! is it so then you must be a plain lucky guy then

                i give up i have no words left now

                Originally posted by blisteringintelligence View Post
                Well i clocked 120 on 16/37 my bike and 110 on a friends bike with 16/34 (speedo figures)... So i commented on what i experienced...
                According to my knowledge the more higher (teeths) you go on rear sprockets the top end decreases and mid range and initial increases..
                this is something new to me

                Any ways congrats on the new discovery enjoy..
                "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

                • #9
                  This is what I have heard/been told/read :

                  Smaller front sprocket : Better pickup - Acc ; less top end
                  Smaller Rear Sprocket : Better Top End , less Acc

                  4 speed bore had good accln , less top end : 16 at front and 34 at rear.

                  5Speed bore had god top end but they wanted better acceleration hence dropped the front sprocket to 15 and the rear sprockets to 38. So the entire idea of putting 15/38 on 5speed was to improve initial pickup.

                  Sprockets alone don't contribute to topend/pickup. Carb,bore etc all play their part. Sprockets are just one factor.
                  Sandeep K Ram blogs at

                  http://sandeepkram.blogspot.com

                  Comment

                  • #10
                    Originally posted by psycho 98 View Post
                    OH my god !!! is it so then you must be a plain lucky guy then

                    i give up i have no words left now
                    Thank you

                    Originally posted by psycho 98 View Post
                    According to my knowledge the more higher (teeths) you go on rear sprockets the top end decreases and mid range and initial increases..
                    this is something new to me

                    Any ways congrats on the new discovery enjoy..
                    Thanks

                    PERSEVERE... failure is not an option!

                    '88 Premier Padmini | '99 Maruti 800 | '99 Yamaha RX135 | '10 Wagon R | '11 Yamaha FZ16

                    Comment

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