Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

0_o 500 for removing tank, opening one bolt, disconnecting injector coupler and jumping it.
You see, thats why i stopped going to SVC.
You said it has been 2 years that s why I included FI and throttle body clean. Don't expect super duper smoothness gain though, chances are you won't even notice it after all cleaning done.

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

There's an entire list of things to be done which is explained in details on the manual. Why don't you just go through that? And no it's not just oil change and spark plug. Everything from greasing, retightening, overhaul, there's an entire list. Check your manual. Manual recommends air filter cleaning at every service. they dont bother with that either, they say, no no its okay. Just make a list from the manual and tell them to check all that, no matter what their opinion is.

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FI, throttle body and air filter clean makes a big difference. You can definitely notice the that with the change in power delivery pattern.

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Be patient with those guys. See if your issue is fixed, otherwise drop an e-mail to Yamaha support (fill out the form on the website). Attach a video of the blink pattern. They usually come back. I remember writing to them about the rear view mirror paint flaking and they did come back to me.

Re: Yamaha YZF-R15 version 2.0

How much should a pre-owned R15 cost, odo reading 5000-10000 km and year 2012 onwards..??

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Re: Yamaha YZF-R15 version 2.0

Around ₹75-80k maybe.

Re: Yamaha YZF-R15 version 2.0

Guys, I've noticed a very slight play in the front sprocket of my motorcycle and also the chain is slightly in contact with the rubber padding fixed above the swingarm. Should I be worried? Or is it also common with other R15s?

Re: Yamaha YZF-R15 version 2.0

I think it's normal!

Hey guys for the first time my bike ran on reserve. My bike stuttered while making the the transition the same thing happened when i refilled and the bike ran on the main.Is this normal or should I be worried.!??

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

mate, as i said earlier, the fact that the manual mentions so many things is precisely the reason why i asked the question for getting suggested on some of the most important/standard things among the internal parts of the bike that MUST be checked at around the 12000kms (or in my case 2 yrs time period) of the bike...one cant just follow the manual too religiously because it also says to do 20 things even every 3000 kms which all of us know is redundant unless someone has really screwed their bike...knowing the standard or minimal subset of works to be done among the whole list helps decide the most important ones to focus on and also helps when the SVC mechs say "this is not required, that is not required" one by one so that i know which ones i can let go (for not being all that necessary) and which ones i will have to insist on to make them agree to do it in case they try to divert away from doing it (usually mechs at my svc agree to do whatever one tells them quite easily while also giving opinions on it on whether it is so important or not,, not really much insistence required in my experience so far)...:-)

btw the SVC at my place here always do the air filter cleaning by themselves, even for those bikes whose owners have submitted them and went away (and hence not present there, like me, to keep them honest)...

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

If it was redundant, it wouldnt have been in the manual. They are preventive actions. it's not like they are to be done only when spoiled. If mechanics knew better than the company that made the bike, then I don't know what to tell you. The manual says either kms or age right? if you dont complete your kms then look at the age. The oils and other wear and tear components are aging as well. I know it feels a little over done, but I'd rather stick to the manual and be happy than listen to a mechanic and always wonder.

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

true, many of those are preventive actions indeed, thats why one needs to know which ones are more important (in the sense of being more than just preventive, something really more necessary or requiring more attention as a standard) than the others...i didnt mean redundant in the sense of being unimportant in absolute terms...

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not sure about the play in front sprocket, but the chain in contact with the rubber padding (or even resting a bit on it) is normal and is there for a very solid reason... without it the chain's everyday life would be even more miserable and stressful.

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

I think some stuff is in there just to cover their ass in case of a warranty claim. Do you get the valve clearance checked every service as recommended in the manual?



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Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

To answer your question in a word: YES.

Like everything else on your bike, valves adjustment is a variable. Meaning it depends on a number factors, not the least being how much the engine is being stressed. Therefore, while some engines will require the valves to be adjusted, some may not. However, the key word out here is 'check' valve clearance. The check is to ensure that valve clearances are within the operating limits. If the valve clearance are nearing the limits then they should be adjusted ASAP.

The other thing that I would like to point out is the assumption that people have made some of the pervious posts; valves only need to be adjusted if there is a rattling sound or it sounds like loose marbles. It's only partially correct and cannot be taken as accurate indicator for valve adjustment.

The fact is that valve can go either ways; they can lean towards becoming loose or they can become tight. Neither of which is good for the health of your Engine. When valves become tight they do not make any noise. Therefore, it is always best to check the valves at the specified intervals by the company. After all they designed the engine, so they know what is best for the engine.


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Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

@abhimanyu31 - what are some sure signs, if any, that the valve clearances are nearing the limits (either too loose or too tight) without having to open the bike up to check it ? for loose tappets there's the rattling noise, and more the noise the more it is loose (anything besides this?) but what in case of tight ?

also, how true is it that a *slightly* loose tappet is supposedly harmless but even slightly tight tappet is very harmful ? this is something i have read many places in the internet (including here), with one most mentioned reason being slightly loose helps with better heat dissipation thus slightly cooler engine, but slightly tight can lead to burned valves etc...how true is all this ?

my bike's tappets make a very slight rattling sound (from many months ago), not much noticeable to the inexperienced ears (including me at first), thus seemingly it's not too loose and presumably well within the limits and going by the above statement of slightly loose tappets being harmless i havent really bothered to submit my bike for a whole day for the svc to do the job (who are always so lazy about this one job in particular)...engine works perfectly fine otherwise.

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

as per my experience, tighter valve clearance will lead to erratic idling and delayed/troubled starting issues(both hot and cold), Reason being that when tight, valve doesnot seat properly and engine doesnot get proper compession because of leaking gas.

I had a discussion with [MENTION=67486]Tanmay26[/MENTION] few months back and as suggested by him i decided to go with intake 0.1-0.12mm, exhaust 0.17-0.2mm now these are a bit tight as per the company setting but works. The sound has gone down, idling is perfect, no flickering whatsoever and no starting issues either

i had to go through the entire process 3 times, and i dont like doing it one bit, but finally the above setting worked. Bike has done about 13k and going strong (last adjustment done at around 7k) and i hope it will go on for few more thousand km before they require adjustment.

Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

First of all, what is valve clearance required for?

The fact is that engines breath through valves. The valve orifices are the openings through which the air/fuel charge flows through into the combustion chamber. After the ignition and combustion event, the burnt mixture is removed through the exhaust valve orifices to make room for fresh air/fuel charge.

To a certain extent valve clearances dictate when valves open and close, how long they stand open and how far they open.

Thus the above facts highlight the necessity to have proper opening and closing of valves.

So why does valve clearance need to be checked and adjusted periodically?

The most important reason due to which valves loose their settings is that parts in the combustion chamber side i.e. valve seats, valve heads, valve guides, wear at faster rate than parts on the other side i.e rocker arms, cam lobes, tapped screws, valve nibs.

Therefore, as I mentioned in my previous post, valve wear is a variable which depends on a number of factors, not the least being how much the engine is being stressed.

Now coming to your question on reliable way to know if valves are tight or loose. The most reliable and the only way to know for sure if the valve settings are within specified limits is to physically check their clearances. There is no other way to do it reliably. That is the reason why bike makers recommend periodic valve checks. Not to cover their ass, not to earn more money through unwanted checks, not to cover for warranty, but because it is the only reliable way to ensure valves are at optimum working tolerances.

Now for the issue of valve train noise. It is a fact that some engines are prone to valve train noise, while some are not. Just because a valve train makes noise does not mean that it is bad. As long as the valve clearances are with the tolerances specified by the bike maker, and as long as every part in the valve train is in good working condition and within tolerances, the sound does not matter. It may be irritating but it's not harming the engine in any way. Therefore, putting too much of emphasis on the valve train noise and trying to eliminate it by going the tighter tolerances route can be more harmful than good.

By the same yardstick going the other way towards more open tolerances has its own set of problems which include accelerated wear of the valve seats, valve stems and valve guides. For example at high rpm the cam is moving too fast to control the closing of the valve and the valve literally bounces in an uncontrolled manner in to the valve seat.

So neither is a lesser evil. Bike makers recommend valve clearance values and period based on a number of factors including usage and materials used. They have done this after extensive testing and is also based on their experience with previous models.

Thus it is best to follow the values provided in the service manual and the timeline recommended in therein. Noise and other sensory inputs are unreliable and can lead to more harm than good.



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Re: Can Daytona on R15 V.20 will match the power of KTM RC 200 ?

@abhimanyu31, appreciate your input.

If the valve clearance is off can it cause pronounced engine vibration?