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is this a gearbox problem ??

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  • is this a gearbox problem ??

    hey guys i have a TVS Fiero f2...
    it has clocked 53k so far...

    i had done an engine rebuild at 51k
    it included
    a new piston +1
    new piston rings
    block boring
    new camshafts
    new timing chain
    new tappets

    recently at 52.9k i got new clutch plates installed too...

    all these are oem products done from tvs svc...

    now i have a strange problem..
    well before going for new clutch plates i was facing this issue...
    the thing is that when i ride say at 50 or 60 and if i revv to 80 my bike behaves unnaturally..
    it keeps revving hard but speed doesn't increase, i have to do this revv process very slowly to synchronize the speed with the throttle..
    if i do it hard it feels like clutch is pressed while riding..
    if i do it hard and keep holding the throttle, it slowly tries to synchronize itself but takes a while and it happens...

    i thought new clutch plates will do the job, but it has increased even more..
    it happens on every gear now and is more noticeable...

    and yes this thing happened AFTER i got this engine work done...

    everything in my bike except the gearbox and the carb is new..
    what say?
    what is it??
    a loose packing or a gearbox problem??
    Giving a lot to a fiero.
    Expecting a lot from a fiero.

  • #2
    Help Topic Approved
    The Wheel was a great invention; Two Wheels with a Motor in between was even better!


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    • #3
      Originally posted by NANOtechnology View Post
      hey guys i have a TVS Fiero f2...
      it has clocked 53k so far...

      i had done an engine rebuild at 51k
      it included
      a new piston +1
      new piston rings
      block boring
      new camshafts
      new timing chain
      new tappets

      recently at 52.9k i got new clutch plates installed too...

      all these are oem products done from tvs svc...

      now i have a strange problem..
      well before going for new clutch plates i was facing this issue...
      the thing is that when i ride say at 50 or 60 and if i revv to 80 my bike behaves unnaturally..
      it keeps revving hard but speed doesn't increase, i have to do this revv process very slowly to synchronize the speed with the throttle..
      if i do it hard it feels like clutch is pressed while riding..
      if i do it hard and keep holding the throttle, it slowly tries to synchronize itself but takes a while and it happens...

      i thought new clutch plates will do the job, but it has increased even more..
      it happens on every gear now and is more noticeable...

      and yes this thing happened AFTER i got this engine work done...

      everything in my bike except the gearbox and the carb is new..
      what say?
      what is it??
      a loose packing or a gearbox problem??
      I'm no expert in the area but I'd guess that you're experiencing a case of clutch slip. I wouldn't trust the TVS SVC guys to do some neat troubleshooting (experience with my Apache150). Get the clutch re-adjusted by a good mechanic. I did face the same problem with my old Yamaha YD125 when the clutch plates eventually gave out.

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      • #4
        thanks dude..
        i did
        in fact that is the first thing i did...
        i even changed my clutch plates basically to solve this problem, nothing worked until now...
        Giving a lot to a fiero.
        Expecting a lot from a fiero.

        Comment


        • #5
          Your clutch is not being released properly. You need to get the clutch housing checked. Also if your have proper play in your clutch lever, then it could be a case of pressure plates/clutch springs etc.


          My offerings to the gods of speed -

          - KTM Duke 200
          - Yamaha RXZ 5 speed


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          • #6
            that's the whole point my friend..
            i changed the clutch plates and pressure plates too as even i thought that's the problem..
            they work great..
            but problem still not solved.
            bike pulls great, i can even wheelie, but i can't revv hard..
            it kinda disconnects from the crank whenever i revv..
            Giving a lot to a fiero.
            Expecting a lot from a fiero.

            Comment


            • #7
              Would be surprising if it had anything to do with the gearbox.

              Do you know if they've changed the springs too, or at least checked their pressure? Bad springs could cause your problem.

              Could be that they haven't soaked the plates in oil before fitting them, but I doubt they would forget that as it is basic procedure.

              Cheap aftermarket friction plates can swell up with heat. If you feel there's less or no clutch lever free play when the engine is hot, then heat might be causing the problem.

              On some offroad bikes wear of the inner hub has caused such symptoms too, but that's the last thing I would look at. Good luck.
              Learn from the mistakes of others. You won't live long enough to make all of them yourself.

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              • #8
                regarding soaking the plates in oil,
                it used to happen before
                also it happens now too..

                which spring are you actually talking about ??
                the inner springs which hold the clutch plate??

                i really don't know what to do...
                Giving a lot to a fiero.
                Expecting a lot from a fiero.

                Comment


                • #9
                  Yes try changing the springs which pressurise the clutch plates. The inner ones

                  Comment


                  • #10
                    Originally posted by NANOtechnology View Post

                    which spring are you actually talking about ??
                    the inner springs which hold the clutch plate??

                    i really don't know what to do...
                    Yes I'm talking about the clutch springs. When you overhaul the clutch you check the springs, visually to see if they are damaged and by measuring their length. If they've gone below their minimum length you should replace them.

                    After all your bike should run better after being serviced, not worse. So if I were you I would just take it back to the mechanic who dealt with it. Ok I know it is a right nuisance, but you paid so you should get it fixed. From what you say it sounds like a clutch related problem.
                    Learn from the mistakes of others. You won't live long enough to make all of them yourself.

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                    • #11
                      well.
                      i didn't get the clutch plates installed from the tvs, but they are oem.
                      besides i won't go to the tvs guys, they are a$$@#$es
                      they fixed head of my engine with silicon gel...
                      it had oil leak issues then from day 2, i went back there to fix it, again that smart mech applied silicon gel.
                      again oil leaked and i repeated the process..

                      it kept on repeating, i was not sure as there's some other sealant used to do the same, but lately got it rectified from another mechanic..

                      if i go back there, i know i'll have to keep going again and again...

                      another problem is that whenever engine is opened up i have to buy new gaskets and new oil all the time, i don't like this but have to get it done....

                      you guys sure with the springs??
                      if it was the case then the mech should have told me when he replaced the plates...


                      wait a second....
                      I'm talking about the springs inside which hold the plate with a needle type thing,
                      am i right ??
                      Giving a lot to a fiero.
                      Expecting a lot from a fiero.

                      Comment


                      • #12
                        Hey I am facing same problem with my Pulsar 150 dtsi

                        Hey friend , I just came online to write a post about my bikes issue and found the issue wid your bike very relative.. So will list ma problem here...

                        My bike used to go 115-120kmph easily in a single seat earlier...
                        But after I changed the clutch plates ... It literralyy ruined my bikes top end... Actually first 5 days after the plates were changed it wass "all is well". But after that I had a trip to mahabaleshwar... and while climbing down the Ghats some thing happened... I was not able to go above 60kmph while my bike was revving at 9k. Then I stopped at a local mech... he removed all the oil... re-adjusted the clutch cable and told its all fine now...
                        But after that I never crossed 115kmph

                        I have also fitted a K&N air filter and got the proper jetting work done...

                        But my bike does not go above 100kmph ... Also its delivering as bad as 25-30 kmpl FE when I race too hard...

                        Recently I had a trip to Mahabaleshwar... It was a total 890km to -fro...
                        And my bike drank 1600rs petrol

                        I really dont know what to do...
                        Now-a-days even a discover 135 whose tp end is 105kmph... easily takes over my bike... Even a guy with a platina over took me once....
                        Now, My bike really insults me when I get some adrenaline rush...

                        Please help me guys..
                        Last edited by abhijeetbuzz; 07-28-2010, 11:11 AM. Reason: addition

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                        • #13
                          abhi
                          did this happen only after clutch plates swap??

                          in my case it used to happen before too, but clutch plates swap made it even more visible...

                          Yes it's the same problem with me...
                          where are you located??
                          Giving a lot to a fiero.
                          Expecting a lot from a fiero.

                          Comment


                          • #14
                            I ve the same problem too on my Hero Honda Street..
                            With the burnt plates also bike was easily doing 80+ on speedo. I changed the clutch plates bcz it was revving high but not moving ahead in 1st and 2nd gear and pulling was low. Mech said it has to be replaced. After replacing the bike pulls ok ok but top end screwed to 60+ and in 2nd gear if i open the throttle the bike raises more and gradually moves. (Clutch slipping)
                            I need to get the clutch adjusted properly, can't go to the same mech as he is in different place. IMO adjusting clutch properly should solve the problem, I haven't got time to check with it

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                            • #15
                              should i go to the same mech who got plates installed??
                              Giving a lot to a fiero.
                              Expecting a lot from a fiero.

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