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Yamaha YZF-R15

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  • #7366
    RPM change

    Hii friends, i have noticed that when i start the bike in neutral the RPM needle goes all the way upto 2.5k and then after about a minute it comes to normal position which is around 1.4-1.5k. What could be the reason?? Also can u use Speed petrol for R15??
    2009 YAMAHA YZF-R15

    I hate people driving fast, thats why i overtake them !!!


    Comment

    • #7367
      ^^ it increases the rev to bring the oil temperature up to operating conditions. And you should use speed with the R15. It will improve the performance and refinement.


      My offerings to the gods of speed -

      - KTM Duke 200
      - Yamaha RXZ 5 speed


      Comment

      • #7368
        Originally posted by jd666 View Post
        ^^ it increases the rev to bring the oil temperature up to operating conditions. And you should use speed with the R15. It will improve the performance and refinement.
        +1 since it has an engine compression ratio of 10.4:1, you can safely use any 91 octane fuel. Engines with CR>10.0:1 can take 91 octane.
        Quench my thirst with gasoline!

        Comment

        • #7369
          Use any petrol , its the same . This aint no sBK to feel that much of a difference in reality .dONE 25k with "Normal fuel " .
          ^^The above 2 lines are my opinion ...

          Santa
          sigpic
          00 Kinetic Style
          04 Pulsar 180 V1
          06 Hyosung Comet GT 250
          07 HH ZMA-R
          08 Yamaha YZF-R15
          10 Suzuki Access
          12 Hyosung GT-650

          Comment

          • #7370
            ^^ you dont feel any difference between normal and premium fuel??? im not even talking about speed 97, just the normal speed 91???

            IMO there is a marked difference in performance/acceleration, and engine vibrations, between normal and premium fuel. Even adulterated fuel makes its presence felt very clearly ( experienced it once).


            My offerings to the gods of speed -

            - KTM Duke 200
            - Yamaha RXZ 5 speed


            Comment

            • #7371
              Originally posted by HydBiker View Post
              Was it just the RPM needle or was the engine too was changing the revvs? (you could make it out by the sound)
              The engine too was changing revvs.

              Comment

              • #7372
                Originally posted by jd666 View Post
                ^^ it increases the rev to bring the oil temperature up to operating conditions. And you should use speed with the R15. It will improve the performance and refinement.
                Thanks sir. I have already tried using the Speed petrol. I emptied the tank and filled with 2 litres. I didnt notice any difference in performance but to my surprise the bike stopped after 70.3km, which means i got only a mileage of 35.x . what could be the reason for this?
                2009 YAMAHA YZF-R15

                I hate people driving fast, thats why i overtake them !!!


                Comment

                • #7373
                  ^^ no explanation mate.. has to be a hard riding style, or incorrect fuel amount ( like you said 2 litres, but maybe you got lesser from the pump).


                  My offerings to the gods of speed -

                  - KTM Duke 200
                  - Yamaha RXZ 5 speed


                  Comment

                  • #7374
                    I take the bike to villages where getting petrol is difficult , let alone speed.

                    There is no difference in smoothness , mileage , power or anything .
                    I get 42+ with whatever i do . No issues with milage ever.

                    Santa
                    sigpic
                    00 Kinetic Style
                    04 Pulsar 180 V1
                    06 Hyosung Comet GT 250
                    07 HH ZMA-R
                    08 Yamaha YZF-R15
                    10 Suzuki Access
                    12 Hyosung GT-650

                    Comment

                    • #7375
                      Originally posted by jd666 View Post
                      ^^ no explanation mate.. has to be a hard riding style, or incorrect fuel amount ( like you said 2 litres, but maybe you got lesser from the pump).
                      Its not about riding style buddy. Because with normal petrol i constatly get above 40. And i filled exactly 2 litres according to meter there. It has to be something else...
                      2009 YAMAHA YZF-R15

                      I hate people driving fast, thats why i overtake them !!!


                      Comment

                      • #7376
                        what ever petrol - I fail to find any difference with the R15. BP / HP / IOC / IBP / Shell / Speed / Power / XtraPremium... in cities, towns and even villages. Only things I didn't try are Shell Super and Speed 97.

                        Comment

                        • #7377
                          alright.. dunno, but there is a noticeable difference..


                          My offerings to the gods of speed -

                          - KTM Duke 200
                          - Yamaha RXZ 5 speed


                          Comment

                          • #7378
                            Its the "mind" rather than the differnce itself . :-P
                            sigpic
                            00 Kinetic Style
                            04 Pulsar 180 V1
                            06 Hyosung Comet GT 250
                            07 HH ZMA-R
                            08 Yamaha YZF-R15
                            10 Suzuki Access
                            12 Hyosung GT-650

                            Comment

                            • #7379
                              I differ here!

                              While using premium petrols like Speed, shell super & XP, I did find the difference interms of smoothness & mileage of the bike. Not just with my R15, but with my both Xtreme's. Little improvement in mileage is there.

                              And definetly its not with mind, A health human body can make out the difference in smoothness of the bike I suppose. But even its with mind, then feeling no difference could be only because of preset mind.
                              2007 - Hero Honda CBZ Xtreme
                              2008 - Yamaha YZF R15
                              2009 - Hero Honda CBZ Xtreme
                              2013 - KTM 390 Duke
                              2017 - Yamaha FZ25

                              Comment

                              • #7380
                                Lets Put it on the Dyno and leave our minds behind :-)

                                ^^ I still will stick to Normal fuel , cos the bike can manage with it .

                                Santa
                                sigpic
                                00 Kinetic Style
                                04 Pulsar 180 V1
                                06 Hyosung Comet GT 250
                                07 HH ZMA-R
                                08 Yamaha YZF-R15
                                10 Suzuki Access
                                12 Hyosung GT-650

                                Comment

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