Re: Yamaha YZF-R15 version 2.0

Colleceted my bike after the second service. Noticed that the visor & my rear view mirror was vibrating. Went back and got it tightened but still the problrm persists.

The rear view mirrors are quite tight now but whatz the source of vibrations ?? Never faced this before

Sent from my Galaxy Nexus

Re: Yamaha YZF-R15 version 2.0

My question is, how could you notice this much when you are riding
You will hear a sound and pillion will hear much cleaner sound and the road side people will hear another sound.
Out of the three, rider will hear more details, so even if you record it, you may not record what you are telling. Because your camera mic will record only the loudest sound only

Engine being stressed is not an issue, its just your feelings you have to get over.
And don't expect r15 to sound like your scooty. It is what it is, i would recommend you to listen to your bike as a pillion or roadside and see.
And you should do more riding than typing up in Xbhp, 1k is not enough to master a bike, and you being a newbie, it will take time.
Like someone mentioned, I also observe small vibrations @ lower rpm and its normal,

In higher rpm range, r15 is very refined and any previous owner of any other Indian bike will agree to this.
For now, you can ignore these vibrations and ride on, if there is something wrong, then it will break and fall down.
If Something wrong with engine, you will get poor millage.

Re: Yamaha YZF-R15 version 2.0


never expecting it to be anything like my scooty mate, sound or otherwise :P

i meant of course as a rider that i can hear the drastic and shriekingly loud harsh sound and feel the very bad vibes at 5000RPM (and beyond) in 1,2,3 gears...it's particularly bad in 1 and 2.

anyway, rode 102 kms today on the expressway and i still several times took it to about 9000 RPM in 1,2,3 gears...not just as testing, but also in the hope that maybe the engine needs to be revved and roughened up so to speak in the 'high RPM low gears' regime and that doing it again and again in low gears would decrease it (and i was praying this approach won't end up worsening things, but had to try it out nevertheless)..in 3rd gear high RPMs it got somewhat noticeably better, but 1st and 2nd are as bad as ever at post 5000 RPM...

today was the first time i full-throttled her a bunch of times . got to 128 kmph around 9k RPM in 6th gear, where the RPM was then stuck everytime, being unable to pull anymore, presumably and obviously because i wasn't maximizing the pull in the gears 1,2 and 3 by taking it all the way to almost 10500..negotiated a few corners at speeds in excess of 120 kmph previous max corner speed of mine was in the bracket 98-103 kmph on a different road (a state highway), done 2 weeks ago

Re: Yamaha YZF-R15 version 2.0

lol .

Re: Yamaha YZF-R15 version 2.0

[MENTION=62910]aditya_YZF-R15[/MENTION] Vibrations are something that is annoying you for a long time i see , did you try double taping the fairing joints , afaik double taping reduces the vibrations caused by fairing , also try tightening engine mounting bolts (svc uses air gun ) which might be loose , also try using rubber washers in small joints like bolts holding seat , exhaust , and radiator , i dont know whether R15 uses these as i rarely ride it . Also engine is new , it will vibrate due to high friction inside cylinder , But not that much as you are saying . Visit pulsar 220 and zmr thread as they both are faired you might get some info from there too .

Re: Yamaha YZF-R15 version 2.0


i tighten up all the visible nuts and bolts on my bike once every few days..the fairing joints, seat joints, etc are all very very tight...i am sure the vibes that i was talking about are not due to these things because if some of these things had been loose enough to cause the noticeable vibes, they'd have been vibrating like that at high speeds at high RPMs as well, infact probably much worse at high RPMs in high gears...there's the twist - the kind of nasty vibes and harshness i am referring to happens only at gears 1,2,3 in the RPM range starting from 4-5000...not in gears 4,5,6 at any RPMs...in 4th, 5th and 6th gear for instance, even at 10000 RPM the whole thing feels compact and smooth with a very natural low frequency low intensity vibe, no harshness in the engine feel or un-naturally shrieking sound (in my ears as a rider)...

anyway, i think i will keep on testing this thing out a few more times and then decide if i need to go to the SVC and force them to look into it...i got a ray of hope today when the 3rd gear started feeling somewhat better at high RPMs than before after hard revving a few times, as described in my previous post...maybe it's just a matter of the engine needing to get used to revs in low gears or something.

Re: Yamaha YZF-R15 version 2.0

I am not an R15 owner but I can relate to ur issue. I recently fiddled with carb n changed the petrol flow to leaner...after that I was feeling the same vibrations from engine like u r feeling from urs. Then I increased the fuel flow thru carb n that returned the buttery smoothness of my Impulse's engine. In my case it worked, u can try it too. From what u mentioned above I have the gut feeling that working on fuel flow will help. Do consult ASC before working on carb. Share the outcome.

Regards n all the best.


Sent from my LT22i using xBhp Connect mobile app

Re: Yamaha YZF-R15 version 2.0

[MENTION=62910]aditya_YZF-R15[/MENTION]


hi bro. have been following your posts. you know that my bike has clocked only around 750 kms, in four months. had two oil changes in two services.

the harshness you are talking about, especially in the first two gears beyond the 5k RPM mark, is present in my bike. i think i can understand what you are talking about. the feel became a tad better after the oil changes. waiting to finish around 1200 kms to see if it becomes better.

i have noticed something. the bike feels very smooth, in the first and second gear, around 6k RPM. when the engine is cold, say when i start for the first time in the morning or when i start after a gap. the harshness returns after few kms of riding, when the bike gets heated up. don't know if you have felt anything similar. please check this and let me know.

for any bike, the harshness in the mid RPM range will be more in lower gears, and less in higher gears. i also have a Pulsar, and believe me, the vibes and harshness it generates in the mid RPM range in lower gears, is much more than this.

it is maybe because we have read so much about R15's vibe-free nature, that it is becoming hard for us to accept whatever vibrations or harshness we are facing. i have to ride another comparatively new R15, to feel the difference, if any.

Re: Yamaha YZF-R15 version 2.0

thanks for the advice..this sounds like something to look into, just in case..

just a question - those harsh vibes you had, at what kind of RPMs were you getting them, and were they there in those RPMs in all gears or just some gears like my case (in my case it's just the gears 1,2,3 at mid and high RPMs)?

or maybe, it's just nothing but what a bit of hard revving will eventually sort out by itself...god knows.

Re: Yamaha YZF-R15 version 2.0

hey bro. the R15 does not have a carburettor. it is fuel injected and the fuelling is entirely controlled by the ECU, based on certain instantaneous parameters.

Re: Yamaha YZF-R15 version 2.0

vibes and bikes go hand in hand.. There will always be some vibes from one part or the other.. Don't sweat it out too much, or you won't be able to fully enjoy your ride.. Your bike is relatively new, and if you feel there is something wrong, ask any experienced friend to ride you bike and then ask for his opinion.. That might actually give you some better idea.. The svc guys will always say there is nothing wrong untill its actually broken..
i used to own v1 and now my brother has a v2, v1 used to be a lott better in this regard.. Bro's v2 doesn't feel as refined as it should be.. And also i couldn't find out what's wrong..
If you could, just don't think about the vibes for sometimes and concentrate on the overall performance of the ride and try to get a proper feel of that.. R15 is a sweet thing to ride.. Enjoy that and don't sweat yourself much on matters like this..
ride safe..

Re: Yamaha YZF-R15 version 2.0

just posting this here as i think this could be interesting and helpful to many people in general..was searching for some books on motorcycle engineering and technology that i think i will check out that explain to a non-pro how stuff works and what are some of the basic steps to sort out some problems by yourself..i know internet is there and i check out a couple of websites dedicated to these things as and when mood beckons, but i'd also like to have books as they save time and have a lot of things at one place...

following are some of them on the topic of how things in a bike work that a simple amazon search sorted by good ratings gives (these obviously are not the books on sport riding techniques or the like) - motorcycle basics techbook by Haynes, essential guide to motorcycle maintenance - tips and techniques to keep your motorcycle in top condition by Zimmermann, modern motorcycle technology - how every part of your motorcycle works by Clarke, modern motorcycle technology by Abdo

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dont know any one in real life who is experienced or knowledgeable about bikes and such things that's why i keep on asking things here and to 1-2 guys in facebook that i know very well via internet from some bike or racing related groups there, or try to know from websites that google turns me up to on searching something...i live in a small campus of people where i am the only one who likes bikes, lol (true story, as the campus is of physicists and mathematicians, none giving a shit about things like bikes and cars. many of them havent ever even ridden a scooty or something) :P and this is not even my hometown, so i dont have any friends or trusted acquaintances outside this campus either...

yes you are right, as much as i am enjoying high speeds, i am still in one part of my mind concerned about this apparent problem. it is indeed an awesome bike, no doubt..irrespective of those harsh vibes at certain RPMs in certain gears...at high gears it's entirely awesome through and through...handling, braking power and stability, cornering stability, acceleration etc are all awesome. but just that issue in low gears

Re: Yamaha YZF-R15 version 2.0

its like this mostly everywhere.. Very rarely we get to meet like minded people.. As for us all, we can only imagine like what your problem might be.. Only you can actually know the reality..
lets for ones assume there isn't anything wrong.. Ok.. Ride for a few days with this mindset and don't feel like there is anything wrong.. Not all the parameters like milege, feel the handling, braking etc etc. with this mindset.. Ok.. Even then if you feel there is something wrong.. Go to svc and bug them untill they figure out the main cause..

Re: Yamaha YZF-R15 version 2.0


no actually i don't find it better or worse when the engine is cold...

and there's actually no harshness at all in the high gears at any RPM, even near 10500 it's hardly something to call harsh, at which i was very surprised and happy today (today was the first time i clocked 10000-10500 RPMs many times in 3rd, 4th, 5th and 6th gears)...however, in the low gears, it starts from mid RPMs and worsens with increasing to high RPMs.. it's a sudden introduction of very uncomfortable and pronounced harshness once you start crossing 4000.

anyway, it's probably and hopefully just normal, even though it's so pronounced at mere mid RPMs...

with only 750 kms done in 4 months and being serviced twice, i'd say your bike is pretty much entirely new. :P

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yep, that's what i decided to do today (and did today in the 102 kms high speed ride on the expressway) and in the next few rides, and as i mentioned in some post above, i will keep testing and checking several things out in the next few rides, and then maybe go to SVC with this particular problem, if it persists.

gave a very good mileage today even though i rode it most of the times full throttled (or nearly), taking it to 10000-10500 almost every time i changed gears from 3-6, with hard accelerations and braking..still it was like 33-34 or so kmpl, to my surprise...gave 36-38 kmpl 10 days ago (which was before service) when i was doing moderately hard accelerations, but no full throttles and RPM within 7500..

Re: Yamaha YZF-R15 version 2.0

didnt go through the last 10 posts. seriously not interested since i am reading the same thing from few days.

Read this particular line abt vibes in 1st n 2nd gear after 5k rpm. this is pretty much common. same thing in my bike. i get a unusual sound form the engine (not exhaust) at 3rd gear around 6k rpm , there you go i said it after few weeks. my periodic service is due and need to do few things. but if u screw your bike in the initial gears then you are seriously screwing it.