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Yamaha FZ 25 Owners Reviews and Experiences

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  • #6271
    Re: Yamaha FZ 25 Owners Reviews and Experiences

    YZ250F 2002 Engine Noise Rattle.mpg
    https://m.youtube.com/watch?v=eNnkU39vLws
    Engine rattle noise. Do you guys think it is the idle gear. Should I replace the idle gear. Will it damage the bike if I leave it . Ideas on what the ratt...


    This is where the sound is coming from, finally I found the source. What say @slopegatri, is this what was shown to you in that Yamaha Monsoon camp you visited?!
    Last edited by burnoutdee; 05-20-2019, 12:55 AM.

    Comment

    • #6272
      Re: Yamaha FZ 25 Owners Reviews and Experiences

      Originally posted by slopegatri View Post
      i i agree it doesn't make sense when we have many other bikes which doesn't make this kind of noise. but there's literally nothing we can do about it.

      [ATTACH]249622[/ATTACH]

      that's the part where noise comes from, i think that before 5k rpm those compression springs ( #part 21) don't fully compress, and around 5-6k rpm, it moves between non fully compressed to fully compressed position within 1 revolution thus generating rattle noise. after 6k rpm it becomes fully compressed and that noise goes away. now Yamaha could use better springs there but if those doesn't compress enough in lower rpms, bike will vibrate a lot more. i could be totally wrong here but that's my theory behind the noise.
      Great explanation. This is most probably the reason for the rattle, the weak-ish springs.

      I've found a similar explanation on some forums for the XT250.

      Comment

      • #6273
        Re: Yamaha FZ 25 Owners Reviews and Experiences

        Originally posted by burnoutdee View Post
        https://www.youtube.com/watch?v=eNnkU39vLws&app=desktop

        This is where the sound is coming from, finally I found the source. What say @slopegatri, is this what was shown to you in that Yamaha Monsoon camp you visited?!
        Unfortunately they didn't show us anything. engineer only said that the noise comes from balancer and that's how it's designed and there's nothing to worry about.

        that video shows that the noise is coming even at idle, i believe that's not same as fz25's rattle noise. because here it comes at a specific rpm range on every single bike. YZ250F doesn't have same issue i think. engine is totally different. thanks for the video btw.
        Fz25 2018 (ABS retrofitted)

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        • #6274
          Re: Yamaha FZ 25 Owners Reviews and Experiences

          Planning to put Apollo Alpha H1, would the tyre upside be fine?

          Comment

          • #6275
            Re: Yamaha FZ 25 Owners Reviews and Experiences

            Originally posted by jass007 View Post
            Planning to put Apollo Alpha H1, would the tyre upside be fine?
            For rear it will be fine* as the rim is 4 inch wide, although it will lower the side wall by 8mm. for front it will change the tyre profile and handling will be a bit heavy. side wall will be 3mm lower than stock. overall seat height will decrease but grip and stability will improve.
            Fz25 2018 (ABS retrofitted)

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            • #6276
              Re: Yamaha FZ 25 Owners Reviews and Experiences

              Originally posted by slopegatri View Post
              For rear it will be fine* as the rim is 4 inch wide, although it will lower the side wall by 8mm. for front it will change the tyre profile and handling will be a bit heavy. side wall will be 3mm lower than stock. overall seat height will decrease but grip and stability will improve.
              You're wrong about the front. I have put Michelin Pilot Street at the front and rear both, and handling couldn't have been better. The bike is just eager to tip.

              Comment

              • #6277
                Re: Yamaha FZ 25 Owners Reviews and Experiences

                Originally posted by JyotishmanS View Post
                You're wrong about the front. I have put Michelin Pilot Street at the front and rear both, and handling couldn't have been better. The bike is just eager to tip.
                That's strange, because literally everyone i know who upgraded front to 110/70 is saying front is now heavier than before although with better high speed stability.
                Fz25 2018 (ABS retrofitted)

                Comment

                • #6278
                  Re: Yamaha FZ 25 Owners Reviews and Experiences

                  Originally posted by slopegatri View Post
                  That's strange, because literally everyone i know who upgraded front to 110/70 is saying front is now heavier than before although with better high speed stability.
                  Usually they people say, upsizing rear cause an issue, but I guess its a myth. Hopefully the Alpha H1 shouldn't be so heavy. One person in Nepal, had put Diablo Rosso II and powertronics, but the tyre didn't cause any drop or any issues apparently. Don't know how true it is, but I'm willing to give it a try.

                  Comment

                  • #6279
                    Re: Yamaha FZ 25 Owners Reviews and Experiences

                    Originally posted by jass007 View Post
                    Usually they people say, upsizing rear cause an issue, but I guess its a myth. Hopefully the Alpha H1 shouldn't be so heavy.
                    Usually, upsizing rear never causes an issue, rather it improves the feel and stability. But it already has a 140/70 rear, which is wide enough for a 250 cc bike. It's not like you can blindly upsize and it'll reap benefits. Before upsizing you should consider does it loses grip on cornering or in other conditions? If yes then it makes sense to play around, get a sitter tyre like Michelin PSR or RevZ S.

                    Comment

                    • #6280
                      Re: Yamaha FZ 25 Owners Reviews and Experiences

                      Originally posted by Zapps View Post
                      Usually, upsizing rear never causes an issue, rather it improves the feel and stability. But it already has a 140/70 rear, which is wide enough for a 250 cc bike. It's not like you can blindly upsize and it'll reap benefits. Before upsizing you should consider does it loses grip on cornering or in other conditions? If yes then it makes sense to play around, get a sitter tyre like Michelin PSR or RevZ S.
                      I'm already using Michelin PSR 140 at the rear, want to try out if 150 section at the rear. But is it worth it?

                      Comment

                      • #6281
                        Re: Yamaha FZ 25 Owners Reviews and Experiences

                        Originally posted by jass007 View Post
                        I'm already using Michelin PSR 140 at the rear, want to try out if 150 section at the rear. But is it worth it?
                        No, until you put a Diablo Rosso or something, which has far superior grip and much better profile for cornering.

                        Comment

                        • #6282
                          Re: Yamaha FZ 25 Owners Reviews and Experiences

                          Originally posted by JyotishmanS View Post
                          No, until you put a Diablo Rosso or something, which has far superior grip and much better profile for cornering.
                          Is it worth to upgrade to Alpha H1, cause that's what I'm planning to put, or stick to Michelin PSRs itself? Currently running PSR at 25th K kms

                          Comment

                          • #6283
                            Re: Yamaha FZ 25 Owners Reviews and Experiences

                            Originally posted by jass007 View Post
                            Is it worth to upgrade to Alpha H1, cause that's what I'm planning to put, or stick to Michelin PSRs itself? Currently running PSR at 25th K kms
                            People who have put an Alpha has said that it doesn't inspire great confidence in the wet. MPSR is just brilliant in all conditions you know. If you upsize the rear, my best bet would be the Diablo Rosso II, and of course the Metz M5 Sportec. Downside is they won't last long as they soft compound.

                            Comment

                            • #6284
                              Re: Yamaha FZ 25 Owners Reviews and Experiences

                              Originally posted by JyotishmanS View Post
                              People who have put an Alpha has said that it doesn't inspire great confidence in the wet. MPSR is just brilliant in all conditions you know. If you upsize the rear, my best bet would be the Diablo Rosso II, and of course the Metz M5 Sportec. Downside is they won't last long as they soft compound.
                              Are there any alternatives to Michelin PSR? Any affordable ones?

                              Comment

                              • #6285
                                Re: Yamaha FZ 25 Owners Reviews and Experiences

                                Originally posted by jass007 View Post
                                Are there any alternatives to Michelin PSR? Any affordable ones?
                                There's Pirelli Angle CT. costs around 4000rs for rear, but grip isn't as much as PSR.
                                Fz25 2018 (ABS retrofitted)

                                Comment

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