Re: Yamaha YZF-R15 version 2.0

I do agree that the bikes are electronically locked at 10.5k rpm but,
If we take that into consideration, then the R15 wouldn't do more than 135 km/hr would it?
To be honest i have ridden R15 a couple of times on the Highway, and i kept on maxing out each gear, and i noticed it went beyond 10.5k mark but not more thn 11k rpms.. It might be needle error so lets just ignore it.

Re: Yamaha YZF-R15 version 2.0

can only be needle error..10500 is the rev limit, and it's ECU controlled..one actually feels the power cut off at 10500 (actually slightly before 10500).

and no man, R15 reaches 135 kmph at much before RPM=10500...so far i have touched 140 once and the RPM was not even 10000, and it's a stock R15..i never noted it down exactly but 135 kmph is around 9.5k.

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sorry i didnt understand what you meant to say..are you saying that in low gears your bike isn't able to reach about 10.5k ?

i have pulled it to nearly 10500 in every gear except 6th (so far).

Re: Yamaha YZF-R15 version 2.0

sorry i didnt understand what you meant to say..are you saying that in low gears your bike isn't able to reach about 10.5k ?

i have pulled it to nearly 10500 in every gear except 6th (so far).[/QUOTE]

Reply to the above post
Bro I'm not trying to tell that my bike isn't able to do 10500 but I myself won't because you kinda feel a drop in the pull once it clocks 10500 rpm which probably you too would have felt.
And I totally agree that it is impossible to do 10500rpm [MENTION=58089]6th Gear[/MENTION].

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Re: Yamaha YZF-R15 version 2.0

Hello bikers. I got a problem with my bike and would be very thankful if anybody out here is ready to provide me a solutionwith.
I got my valve clearance done at a local mechanic who said me that the tappets were very lose and I personally felt smoothness which was absent earlier and no abnormal sound was being produced. I was very much happy but at the same time I found a kinda lag while I move my vehicle initially and when I said the same to mechanic he claimed it to behave the same when the engine is cold. But it is repeatedly happening and very painful at time of U turn and slow moving traffic. Its like few jerks then load is taken. Is it because the fuel pumo is spoilt while working with valves or fuel injectors is damaged or is it that fuel injector isn't getting sufficient fuel to burn?
Also my fuel reading show an error. Even after refilling for like 200 bucks 'f'/reserve continues after few seconds of 2 points on da fuel meter.

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Re: Yamaha YZF-R15 version 2.0

yes, that's the rev limiter kicking in and cutting off the transmission of the power from the engine to the rear wheel :-)

never said it's impossible to do 10500 at 6th gear, just that i havent yet been able to reach there (i dont even rev it up that far so often, so havent even really tried getting there more than a couple of times)..wind resistance, if nothing else, seems to be too much for the 6th gear to pull you to RPM nearly 10500, as some other people had also said to me when for the first time i had noticed that in 6th gear RPM got stuck way before even 10000 and asked about it here..some people here have said that they have done 145+, which i suppose happens post 10000.

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there's such a significant difference in the throttle response (under grabbing a chunk of throttle at once) when the chain is nicely lubed and when it's not been lubed for about a 1000kms..

always knew that in theory, but first time today i actually felt it in abundance (first own bike and all)..had lubed the chain 2 days ago (1000kms or so after the previous time that it'd been lubed) and went for a fun ride today (first time after lubing) and such a significantly noticeable improvement in the throttle response when you grab a chunk of throttle at once..actually even the response under gradually slow throttling feels better..in the last 100-200 kms i had indeed felt a rather delayed (by a noticeable fraction of second, of course) throttle response (feel of the rear wheel drive) under grabbing a chunk of throttle at once, and that's how i learned it was time to lube it.

Re: Yamaha YZF-R15 version 2.0

Radiator Fan Issue

Re: Yamaha YZF-R15 version 2.0

Did the local mechanic measure the valve clearance with flier gauge with apt measurements? Or he just tightened it without any measurements? Over tightening will cause problems. The fuel injector is no where near the valves. So don't worry about that.
And its better not to ride in reserve. Hit the fuel station and always keep more fuel in tank for getting a good life for the fuel pump.

Re: Yamaha YZF-R15 version 2.0

Thank you for the response.
I have no idea if he has measured with a tongue cleaner look alike thing. And its not in reserve and I'm pretty sure about it. Also can you tell me as to how the fuel pump gets affected if bike is rode in reserve? :sly:

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Re: Yamaha YZF-R15 version 2.0

When the fuel level is low, the pump has to work much harder to produce the same pressure. This is because the reduced fuel weight no longer pushes fuel into the pump. Instead the pump must draw the fuel in. There is also less fuel to dissipate heat and the overworked pump is likely to be damaged. And more over, when parked in direct sunlight with low fuel, the part of the pump that is not immersed in the fuel gets dry and the pump 'can' fail. Fill fuel , keep the pump fresh

Re: Yamaha YZF-R15 version 2.0

Is r15 good to ride for riders whose height is 5.10?

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Re: Yamaha YZF-R15 version 2.0

Its absolutely fine mate !

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Re: Yamaha YZF-R15 version 2.0

I feel engine braking is bit too much on mine when compared to other bikes. Is it a good or bad sign??

Noob's!!!! Riding with headphones on road. Dunno when these people are gonna learn that they are not at all smart :banghead:

Re: Yamaha YZF-R15 version 2.0

Actually bad. I mean your engine isn't free. Wonder what would be the reason:sly:

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Re: Yamaha YZF-R15 version 2.0

But its silky smooth and revs freely till redline. No probs. While searching here,read somewhere good engine braking is a sign of healthy engine. But you are saying otherwise any other views?

Re: Yamaha YZF-R15 version 2.0

Yupp good engine braking is really a healthy sign indeed but then you mentioned a bit bad compared to others.
Engine braking is to be done below 7k rpm to avoid fishtail and damage to the engine.
You probably might have done it beyond that which might have made you feel it harder or bad comparatively!
If you engine is running smooth otherwise there is nothing you are to be afraid of!

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