Re: Yamaha YZF-R15 version 2.0

why so ?

(i agree 140 is unnecessarily too much for R15 and will significantly hamper performance).

@dixant - yes it's totally normal. among other things, it's primarily (assumed to be) the sound of the catalytic converter cooling down (thus, contracting back on its way to its normal-temperature dimensions, hence the tik tik sound which is something one can usually hear (even in daily life) when (most) metals are heated to a very high temp and then subjected to rapid cooling) rapidly.

Re: Yamaha YZF-R15 version 2.0

Okay, thank you mate.


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Re: Yamaha YZF-R15 version 2.0

Today did servicing of my bro's bike ourselves.
Changed engine oil (used Motul 7100), air-filter and refitted the whole fairing. Completely took every part out, cleaned and then put them back. Placed rubber-tube pieces between parts where vibes used to come and now it feels like awesome. Super smooth. Actually, bike was in a accident few months back and whole right end was changed. Vibes had started since then, maybe due to improper fitting of parts at the svc.


A question guys, when should the coolant be refilled or changed ?
Its been over a year now and has never been refilled or changed. Today, during working on the bike, opened the radiator cap and it was full (green colour fluid). We had brought Motul coolant for that, but didn't used it.

Re: Yamaha YZF-R15 version 2.0

The superbikes/supersports have huge rear tires to deal with the massive power/performance of the bike. The 130 on the R15 is probably there just for the supersport look.

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A few pics from the Nov'13 xbhp Delhi G2G, thanks to Avinash ('The monk') and the folks at xbhp.

Re: Yamaha YZF-R15 version 2.0

I feel it's worth upsizing to even duke's rear 150 section tyre as it has a more rounded profile
Pros -more curved profile - better cornering capability.
Better handling and braking.
Cons-
Ride quality decreases because of decreased sidewall.
Lower initial acceleration
Rim damage, chipping can happen easily.
Its all about priorities.

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Don't baby your engine too much bro, load her once in a while to 6-7k rpm and 7-8k rpm after 500km.
The key is slow acceleration and deceleration.
Have fun, ride Hard,ride Safe.

Re: Yamaha YZF-R15 version 2.0

I suppose the rim size of the KTM must be wider than the R15? Also, are you talking about changing just the rear to the KTM's or the front too?
I haven't tried it so i don't know how well it works on the R15. But if it were better than stock then you can bet the guys racing R15's on the track would have switched to the 150 tire. AFAIK, that isn't the case infact they would probably prefer a thinner tire if such were available.

But you know what? Someone really ought to try the Metzeler Sportec M5's on the R15 ! ;-)

Re: Yamaha YZF-R15 version 2.0

As I said it's all about priorities.
U can change the front as well to the duke's tyre.It fits perfectly as I know so one who's been happy with them after doing 2k kms on them.
The handling characteristic does change a bit.The key point here is the curved profile of duke's tyre provides better confidence in corners for us noobs who are still in the leaning curve.
Wrt race preped bike, they want to loose as much weight as possible, so they go in for smaller but soft compound slicks that provide superior grip.
They even go to the extent of convert rear discs to drum brakes for weight saving.

Re: Yamaha YZF-R15 version 2.0

Yeah bro, i'll keep that in mind.




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Re: Yamaha YZF-R15 version 2.0

Can anyone share the cost of rear tyre hugger please.
I wish to cut the current one and use the New one for monsoon.

Re: Yamaha YZF-R15 version 2.0

Its for ₹350

Re: Yamaha YZF-R15 version 2.0

I think you mean the KTM tire has a more rounded profile. The R15 tire has a somewhat aggressive V-shaped profile which makes it tend to 'fall' into corners, it sure takes some getting used to.

Re: Yamaha YZF-R15 version 2.0

I absolutely love the way MRF says "NA" for features and benefits. Almost like its too awesome to tell!



On a totally unrelated note, if one is willing to spend 1.2L+ on a bike, please, please invest in a good quality helmet. Don't simply walk in to some shop and buy a helmet that suits your jacket or bike color. That helmet may just as well be the only reason you live to tell the story of how you totally almost died and then didn't. Get a safe helmet (and i don't mean the brand).

Re: Yamaha YZF-R15 version 2.0

would like to disagree, although can't think of proper arguments to support my disagreement :P ;-), except for saying that i dont think yamaha would do something silly like that and give the bike a 130 just for the looks if they knew better performance could be had from a thinner tyre..i am sure it probably is the optimal tyre size for whatever various performance and design priorities they had decided this v2 should have while designing it..it sure gives a massive linear stability on roads with highly questionable surface/grip, and also when one suddenly encounters small stones, sharp bumps and other destabilizing irregularities on the roads at high speeds..i am not saying that, say, a 120 could not have performed the same as this 130 does in the said situations, but am sure (or rather, would like to believe so until proven/shown evidence of otherwise) it's the optimal size and not merely for supersport look..if that were the only primary reason, i think yamaha would have given this at least a 140 (like the fz etc), because the 130 doesnt look THAT supersporty anyway (maybe they indeed thought of 140 until they saw it hampered performance a lot).

on the same note, if 130 is indeed the technically optimum tyre size, merely installing thicker tyres (rear, front or both) should be expected to lead to a downfall, little or significant, in overall performance (thicker tyres dont necessarily mean better handling and cornering..a lot of how good or bad a bike handles, in particular corners, depends on suspension settings in fact that's a primary factor)..one should, in such a case, also change appropriately some other things in the bike, at least the suspension settings..

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true story. haha.

how awesomely does it 'fall' into the corners and if one finds it too much or too intimidating, correcting it is as easy as well.

Re: Yamaha YZF-R15 version 2.0

Guys I really need your help.
I have ffe and k&n bed type air filter installed on my bike. Which made no major changes.
So I decided to do some performance mods which includes:
Powertronic rs ecu
Big bore kit 180cc
High lift camshaft
NGK iridium sparkplug
power cable for plug
And valve springs (I'm not sure about it does it do Any good.)
I'm based in lucknow so parts will take about a week to reach me. I'm confused are these fittings complex I know a mechanic from service center would he be able to do it. As far as I know abhimanyu did these mods far ago so could you please give me some kind of report on problems faced by you , benefits , reliability and some other details.

Re: Yamaha YZF-R15 version 2.0

Since you have already ordered the parts, the money has been lost.
Go through this thread: http://www.xbhp.com/talkies/general-...ouse-fz18.html It might take you whole night to read from page one to last, but go through this. All your queries will be laid to rest. Don't stop in between, read the complete thread.

Just my 2 cents, don't do any further mods like the big-bore n all. Its not worth it.