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Yamaha YZF-R15 version 2.0

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  • #12841
    Re: fluctuating RPM

    Originally posted by Midhun.akd View Post
    Hello friends.. my r15 v2's (2016 model 9500km ) engine rpm always varying.. when morning start Engine RPM is about 1400-1500-1600 but after a ride say 10-15 km rpm fluctuate to 1100-1200.. in my first service (800km) they adjusted tappets beacause of noise.. in my last service (88xx km) cleaned the injector..what is culprit bros ??
    one more question any one tried double bubble visor here ?? please share your thoughts about it ..
    That's normal in my opinion. The idle should be 1300 to 1500 when hot so yours is not abysmally low.

    CHEERS
    Yamaha RXZ 5 speed (sold)
    Bajaj Pulsar 220 DTS fi( sold)
    Bajaj Discover 112(2006)
    Yamaha R15 V2(2011)
    Yezdi 250 model B(1978)
    RX 135 4 speed(1998)
    Yamaha Rajdoot 350(1989-unrestored)
    Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
    Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

    Comment

    • #12842
      Re: fluctuating RPM

      Originally posted by Midhun.akd View Post
      Hello friends.. my r15 v2's (2016 model 9500km ) engine rpm always varying.. when morning start Engine RPM is about 1400-1500-1600 but after a ride say 10-15 km rpm fluctuate to 1100-1200.. in my first service (800km) they adjusted tappets beacause of noise.. in my last service (88xx km) cleaned the injector..what is culprit bros ??
      one more question any one tried double bubble visor here ?? please share your thoughts about it ..
      Your bike's tappet clearance or valve clearance is set lower than the minimum, and for that the bike is not breathing properly, keep 0.10-0.14mm intake valve clearance and 0.20-0.25mm exhaust valve clearance. Do not keep higher than the upper limit, the engine will be hot and noise will be more. Also do not keep below than the lower limit, the engine will not run smoothly (fluctuating rpm).
      Now, do not rev the engine, go to service station, keep an eye what the mechanic is doing, just check whether he is using proper thickness feeler gauge or not, for intake he should use 0.10mm or 0.004 inch feeler gauge & for exhaust he should use 0.20mm or 0.008inch feeler gauge.
      And also one major thing, adjust all these changes in cold engine (preferably in morning), otherwise metal get expanded due to heat and that may not be optimum valve setting.

      ----consecutive posts auto-merged-----

      Originally posted by black asp View Post
      That's normal in my opinion. The idle should be 1300 to 1500 when hot so yours is not abysmally low.

      CHEERS
      That is not normal brother. His tappet settings are below minimum recommendation.
      Regards
      Saikat

      Comment

      • #12843
        Re: fluctuating RPM

        Originally posted by saikatbyte View Post
        Your bike's tappet clearance or valve clearance is set lower than the minimum, and for that the bike is not breathing properly, keep 0.10-0.14mm intake valve clearance and 0.20-0.25mm exhaust valve clearance. Do not keep higher than the upper limit, the engine will be hot and noise will be more. Also do not keep below than the lower limit, the engine will not run smoothly (fluctuating rpm).
        Now, do not rev the engine, go to service station, keep an eye what the mechanic is doing, just check whether he is using proper thickness feeler gauge or not, for intake he should use 0.10mm or 0.004 inch feeler gauge & for exhaust he should use 0.20mm or 0.008inch feeler gauge.
        And also one major thing, adjust all these changes in cold engine (preferably in morning), otherwise metal get expanded due to heat and that may not be optimum valve setting.

        ----consecutive posts auto-merged-----


        That is not normal brother. His tappet settings are below minimum recommendation.
        My bike idles at 1200 1300 rpm when hot. My tappets are fine. Set at .11 and .21. done so many kms I forgot. No idea how you are so confident about the tappet thing brother.
        Yamaha RXZ 5 speed (sold)
        Bajaj Pulsar 220 DTS fi( sold)
        Bajaj Discover 112(2006)
        Yamaha R15 V2(2011)
        Yezdi 250 model B(1978)
        RX 135 4 speed(1998)
        Yamaha Rajdoot 350(1989-unrestored)
        Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
        Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

        Comment

        • #12844
          Re: Yamaha YZF-R15 version 2.0

          Anyways if your tappets are below the specified spec it will give a stitching sound when hot. If that's not the case I doubt it's a tappet issue. How I know it?? Have been working on motorcycles for last 9 years and have screwed up my bikes tappets .any times in my ex 220 fi and occasionally on my current R15.
          Yamaha RXZ 5 speed (sold)
          Bajaj Pulsar 220 DTS fi( sold)
          Bajaj Discover 112(2006)
          Yamaha R15 V2(2011)
          Yezdi 250 model B(1978)
          RX 135 4 speed(1998)
          Yamaha Rajdoot 350(1989-unrestored)
          Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
          Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

          Comment

          • #12845
            Re: fluctuating RPM

            Originally posted by black asp View Post
            My bike idles at 1200 1300 rpm when hot. My tappets are fine. Set at .11 and .21. done so many kms I forgot. No idea how you are so confident about the tappet thing brother.
            I am confident that I did it twice, and on first attempt the idle rpm was not proper (fluctuating) because of over tightened adjustment by me. Again I corrected that. But, his rpm loses considerably when hot that is why I said that.

            Click image for larger version Name: 1111 (1).jpg Views: 1 Size: 121.9 KB ID: 1952840

            Click image for larger version Name: 1111.jpg Views: 1 Size: 131.2 KB ID: 1952839
            Regards
            Saikat

            Comment

            • #12846
              Re: Yamaha YZF-R15 version 2.0

              That's a clean looking engine.
              Yamaha RXZ 5 speed (sold)
              Bajaj Pulsar 220 DTS fi( sold)
              Bajaj Discover 112(2006)
              Yamaha R15 V2(2011)
              Yezdi 250 model B(1978)
              RX 135 4 speed(1998)
              Yamaha Rajdoot 350(1989-unrestored)
              Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
              Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

              Comment

              • #12847
                Re: Yamaha YZF-R15 version 2.0

                Originally posted by black asp View Post
                Anyways if your tappets are below the specified spec it will give a stitching sound when hot. If that's not the case I doubt it's a tappet issue. How I know it?? Have been working on motorcycles for last 9 years and have screwed up my bikes tappets .any times in my ex 220 fi and occasionally on my current R15.
                Even I am doing basic stuffs from my 2012 honda stunner to 2014 yamaha fazer to 2017 yamaha r15v2. You may check google if your tappets are below recommendeation, then the bike will stall in traffic while pressing clutch or when idling.

                ----consecutive posts auto-merged-----

                Originally posted by black asp View Post
                That's a clean looking engine.
                yes. i try to keep engine clean than panels.
                Regards
                Saikat

                Comment

                • #12848
                  Re: Yamaha YZF-R15 version 2.0

                  Originally posted by saikatbyte View Post
                  Even I am doing basic stuffs from my 2012 honda stunner to 2014 yamaha fazer to 2017 yamaha r15v2. You may check google if your tappets are below recommendeation, then the bike will stall in traffic while pressing clutch or when idling.

                  ----consecutive posts auto-merged-----


                  yes. i try to keep engine clean than panels.
                  When did I say it won't stop when the engine is hot if it's below specs. Its plain common sense. Thanks for your google advice but it was not needed. Why make things up. I said it may not be tappet issue. Simple don't come up with things that didn't happen.
                  Yamaha RXZ 5 speed (sold)
                  Bajaj Pulsar 220 DTS fi( sold)
                  Bajaj Discover 112(2006)
                  Yamaha R15 V2(2011)
                  Yezdi 250 model B(1978)
                  RX 135 4 speed(1998)
                  Yamaha Rajdoot 350(1989-unrestored)
                  Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
                  Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

                  Comment

                  • #12849
                    Re: Yamaha YZF-R15 version 2.0

                    Originally posted by black asp View Post
                    When did I say it won't stop when the engine is hot if it's below specs. Its plain common sense. Thanks for your google advice but it was not needed. Why make things up. I said it may not be tappet issue. Simple don't come up with things that didn't happen.
                    But, he said those rpm related things happened after adjusting valve clearance.
                    Regards
                    Saikat

                    Comment

                    • #12850
                      Re: Yamaha YZF-R15 version 2.0

                      Brother I know. What you said is 100 cents true. I even appreciated the work you did on your bike. I never opposed you. There could be many issues from vacuum in the fuel pipe to a dirty butterfly. Could be a tight tappet too but again sound change in the engine will be the first giveaway. If it's too tight it will give weird tik tik sounds. Its just that the info he gave is a bit low. And what I said about my bike is true. It idles at 1200-1300 rpm and tappets are constant at .11 and .21. The cold engine rpm is 1500 . It falls down as the engine becomes warm. It falls down even when you switch off your bike before it becomes warm and restart it again immediately but climbs back to 1500 rpm immediately.
                      Yamaha RXZ 5 speed (sold)
                      Bajaj Pulsar 220 DTS fi( sold)
                      Bajaj Discover 112(2006)
                      Yamaha R15 V2(2011)
                      Yezdi 250 model B(1978)
                      RX 135 4 speed(1998)
                      Yamaha Rajdoot 350(1989-unrestored)
                      Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
                      Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

                      Comment

                      • #12851
                        Re: Yamaha YZF-R15 version 2.0

                        Thank you bros @black asp & [MENTION=70653]saikatbyte[/MENTION] for your suggestion and opinion..
                        when engine in hot or warm condition (after riding 10-15 km) RPM fluctuate to 1100-1200 (engine gonna stall or off feel ) from 1400-1500 ..as your opinion i think maybe its normal or valve clearance problem.. there is no tappet sound i'm sure..any problem in running in this condition till next service 12000km ?? next week we are going to ride about 350km..
                        Last edited by Midhun.akd; 08-08-2017, 11:52 AM.

                        Comment

                        • #12852
                          Re: Yamaha YZF-R15 version 2.0

                          Did you try adjusting the idle screw?
                          Yamaha RXZ 5 speed (sold)
                          Bajaj Pulsar 220 DTS fi( sold)
                          Bajaj Discover 112(2006)
                          Yamaha R15 V2(2011)
                          Yezdi 250 model B(1978)
                          RX 135 4 speed(1998)
                          Yamaha Rajdoot 350(1989-unrestored)
                          Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
                          Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

                          Comment

                          • #12853
                            Re: Yamaha YZF-R15 version 2.0

                            Originally posted by Midhun.akd View Post
                            there is no tappet sound i'm sure..any problem in running in this condition till next service 12000km ?? next week we are going to ride about 350km..
                            There will not be any tappet sound because of very minimum clearances you had put. In r15 engine, there is very slight tappet noise which is very obvious for a new bike also. So get it checked from a service center soon, otherwise slightly tightened tappet setting can start damaging the valve stem or push rod. A good valve setting breaths easily, not like 1100-1200rpm, it will be 1400+-50rpm.
                            Regards
                            Saikat

                            Comment

                            • #12854
                              Re: Yamaha YZF-R15 version 2.0

                              Hey guys
                              My front Tyre is due for a change. What are the effects of upsizing(100/90) /downsizing(80) in riding Dynamics? Pls shed some light on this and as well as the rear Tyre.

                              Sent from my Nexus 5 using xBhp.com mobile app

                              Comment

                              • #12855
                                Re: Yamaha YZF-R15 version 2.0

                                A poor valve setting won't affect rpm in 50 or 100 rpms the effect will be large not miniscule like he stated. Below is the idle after its hot in my engine and the tappets are fine.
                                Yamaha RXZ 5 speed (sold)
                                Bajaj Pulsar 220 DTS fi( sold)
                                Bajaj Discover 112(2006)
                                Yamaha R15 V2(2011)
                                Yezdi 250 model B(1978)
                                RX 135 4 speed(1998)
                                Yamaha Rajdoot 350(1989-unrestored)
                                Bajaj Pulsar 220 DTS-i (2011)Crashed and sold :'(
                                Bajaj Pulsar 220 DTS-i (2009-Fastest Indian)

                                Comment

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