Oh come on. '...' is harmless and not exactly SMS lingo. It is used to convey a small pause in a statement !!

.

The bike is 19ps, with 2Nm extra torque.

R15 shares its roots with the Vixion from Indonesia which again is based on the T135 step-thru which is widely available in Indonesia and Malaysia. While Yamaha claims that its a complete product built ground up for India (fairing design only ) it is anything but that.
R15 shares many of its components, chassis and cycle parts with the Indonesian Vixion but apparently makes slightly more power in its form in India. It derives its roots from the T135 platform which in our case has served to be an excellent platform for a small capacity 4 valve 4 stroke engine. And all our 20P batch bikes had several components, cycle parts etc imported from Indonesia and Singapore notably the engines \m/

Talking about the diameter here..taller Tyre will show lesser speed than the default one at the same RPM. So what Samarth said is possible.

21BHP air filter, ecu remapping, high lift cams and exhaust? keeping in mind noise/emission norms, aint it a little too optimistic?

Ok, read my reply carefully so you don't get confused.

Firstly, I did NOT say that sticky tyres change gear ratios.
It just happened in my specific case, as 100/80 (R15's tyre) was smaller in profile, than 100/90 (stock Pulsar's tyre) which made my bike undergeared.

Also, I just said that very-sticky tyres decrease the performance of the vehicle in terms of 0-60 kmph, roll ons, etc. because they provide more stickiness and resistance to move forward.
A soft tyre is like a bubble gum, its so sticky that it becomes difficult to push it, but it does give grip nonetheless.


Secondly, I don't have any such "documentation", but do you really think that in an era of carburetted bikes, a fuel injected bike will have a problem passing emission norms?
To give you a small idea, Fi reduces pollution by around 60-80% compared to Carburetted bikes.
You know YZF R6 and ZX 6R? Such a high state of tune and 16,000 rpm revving, still they both pass Euro III in many countries, probably due to an exhaust change every few years or so.

BS II is just a small standard compared to Euro III. Give the R15 a proper exhaust and it will pass the standard easily..

And I wonder why is Joel bro not replying? I sent him a PM too... He knows everyone will trust him rather than me..



It's the opposite. Taller tyres will show more speed than smaller profile tyres, at a particular rpm "X".

The bike is 19ps, with 2Nm extra torque. Bore&stroke angles changed by 0.5mm.
Weight is less by just about 1kg.
Should have better low end response with the extra torque at hand+sprocketing changes.
Top end should be about the same or maybe slightly higher.

Keep living in your own theory with 'bubble gum' tyres.

How are you so sure?? speculation, I guess.

Would you mind sharing source of this info?

Relax, samarth just said all these things after testing those tyres on his Pulsar 180 ugIII, and the same was experienced by the fellow member xionite and the rpm and speed which he expressed was on his P180. If you fit lower/higher profile tyre on your bike, won't you make the gearing taller/shorter?? What he said referring to the gear ratios has nothing to do with the sticky tyres. He said that the sticky tyres have more drag(correct me if I'm wrong) that's why the bike runs under pressure.
Regarding the emission norms what he replied to your post is truly justifiable, that if the carb bike can clear the emission norms why won't a tech-laden fuel injected bike and he gave the example of the r6s and other 600s which rev past 16000rpm mark and are still able to clear the euro3 norms which are tougher than our emission norms.
And you really don't require documents for this discussion because it's all logical.

some screenshot of a specsheet floating around on facebook.

Are you talking about the one from Yamaha website?

found this on face book

Yamaha YZF R15 V2.0 | Facebook

Are you talking about the one from Yamaha website?

It says 17ps and 15nm, same as old motorcycle.

couple of users who posted that pic say so. They say that they got it from some website designers who where running test runs on yamaha website. dont think it is true though. yamaha havent done any modifications on any of their indigenous engines after the first release(if ever they did, they released it as a completely different model). and for an engine developed and produced outside(already at a high tune level) all this "more power for sure" speculations pretty much seems far fetched to me.

Oh I am pretty relaxed buddy. Regarding the tyre, I can understand that softer compound tyres will have more drag than the hard compound ones. But FYI, R15 already comes shodded with soft compound tyres. Is Samarth using 'race spec slicks'? And about the emission norms, do we have any anybody who can provide the complete details asin hoew it is done? AFAIK, they aren't measured at idle. Its a specific speed (I guess 90 or 100kph for Europe) in top gear at which they measure emissions. Also, emission norms include the sound as well.