Announcement

**Suresh@yammie** · 02-12-2014, 07:01 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by hatebreeder View Post

Iridium sparkplugs have nothing to do with performance. Standard sparkplugs are copper plated (correct me if I am wrong) which is a better conductor than iridium. The only reason iridium ones exist because that material lasts longer. I will have to calculate, but I think it will work out cheaper to change regular spark plugs at it's interval than use iridium ones because the price difference is a bit too much.

In fact I have a sneaky suspicion that it may affect efficiency adversely as iridium isnt as good a spark producer as copper

.........I agree with you

but Iridium spark plug is something to do with the capacity , ps, compression ratio as stated by other Xbhpians.... Copper or platinum has got good firing order though, Iridium known for little bit of improved performence but whether it is appropriate for r15 which is what I wanted to check with you people..

PS: Duke has the above mentioned slight bit of power advantage and it equipped with iridium as stock one.

But for r15 I am very much happy using stock sp after getting all your suggestion: cheersthumbup:

**ArnabC** · 02-12-2014, 09:47 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by Pinaki View Post

Hi Arnab , your valve tappets are set too tight . You already guessed how that happened . So pester the service center to correct it and they better use an accurate feeler gauge for it this time . Also remember that tappet clearance should be set on an absolutely cold engine ( if you ride to the service center , leave the bike there for 4 hours before the job - to cool down fully ) . A little loose and noisy tappets is better than even a wee-bit tight one - you already know how tight tappets feel now - it hurts the motor too . Idle rpm on the other hand is set on a very well warmed engine . In both cases use the values given in your bike's owner's manual .

Pinaki: Sirjee, need your advice once more. The idle RPM is now stable when the engine has been run for around 20kms or more i.e. when it is hot. It is staying within the preferred range of 1.3-1.5k. Also when the bike is running and I am applying the clutch, the idle RPM is ok and the engine is sounding corect. But when I am trying to start the cold engine, say after a gap of 4 hours or more, the idle RPM issue is coming back. It is either getting turned off or the engine is struggling at 1.1 to 1.2k range. I conveyed to the service center guys the same things that you suggested but I don't think the issue got resolved. I am really confused about what to do now.

Also I am recently getting a tick tick sound from the front portion of the bike. Its almost resembles the sound of the throttle cable release sound. It is coming whenever I am revving the bike fast or stopping or there are some undulations in the road, which in India is quite common, and so the sound is also quite frequent and increasing day by day. Any ideas where it is coming from? BTW I checked the cone set and there is free flow in the cone set.

**siddharthsure** · 02-12-2014, 10:03 PM

Re: Yamaha YZF-R15 version 2.0

Guys... Will idle RPM setting have any effect on mixture or throttle response?? Mine is 1400 when cold and 1100 when warmed up from the showroom.

**Pinaki** · 02-13-2014, 02:36 AM

Re: Yamaha YZF-R15 version 2.0

@ ArnabC - rpm problem you mention can happen from 2 sources i) air filter clogging ii) fuel system adjustments wrong . Get it tuned correctly from better mechanic or service center . For the front wheel noise . check i) front brakes ii) coneset bearings iii) front fork .

**nastrofaction** · 02-13-2014, 12:16 PM

Re: Yamaha YZF-R15 version 2.0

anyone tried the michelin radial for the rear, reviews ? size is same.

**Ron Syl** · 02-13-2014, 02:05 PM

Re: Yamaha YZF-R15 version 2.0

Keep idle rpm at 1.4k (when engine is warmed up) 1.1 or 1.2 is too low. the SVC mech kept mine at 1.2k. feeling uncomfortable while going at low speeds. yes it will affect throttle response in lower speeds and gears, but not much. you might face engine going off if you dont throttle at correct time while leaving the clutch.

**Suresh@yammie** · 02-13-2014, 04:04 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by Ron Syl View Post

Keep idle rpm at 1.4k (when engine is warmed up) 1.1 or 1.2 is too low. the SVC mech kept mine at 1.2k. feeling uncomfortable while going at low speeds. yes it will affect throttle response in lower speeds and gears, but not much. you might face engine going off if you dont throttle at correct time while leaving the clutch.

Even mine is kept moving from 1.2k to 1.4K (stays for a while in 1.3 k before get settling in 1.4k and that too happening initially when I start every day) is that a change in temperature prior to warm engine.
Is that normal?

**Ron Syl** · 02-13-2014, 04:33 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by Suresh@yammie View Post

Even mine is kept moving from 1.2k to 1.4K (stays for a while in 1.3 k before get settling in 1.4k and that too happening initially when I start every day) is that a change in temperature prior to warm engine.
Is that normal?

yes, when you start the engine it will usually start with higher rpm (my observations), and settles to the required rpm range. the ecu controls this based on the temperature of the engine. and this keep varying, noticed it during stops at traffic signals. it also changes little when you hold the clutch. this AFAIK will not stay at certain rpm for a longer time, it keeps varying. but the lowest it should go should be 1.3k rpm, because lesser then that it will cause the engine to stall at times. 1.4k rpm is best.

**aditya_YZF-R15** · 02-13-2014, 04:47 PM

Re: Yamaha YZF-R15 version 2.0

mine goes 1.1k or so when warmed up as well (1.4k or so when engine's cold)...guess i need to get it adjusted as well.

**siddharthsure** · 02-13-2014, 06:31 PM

Yamaha YZF-R15 version 2.0

Originally posted by Ron Syl View Post

Keep idle rpm at 1.4k (when engine is warmed up) 1.1 or 1.2 is too low. the SVC mech kept mine at 1.2k. feeling uncomfortable while going at low speeds. yes it will affect throttle response in lower speeds and gears, but not much. you might face engine going off if you dont throttle at correct time while leaving the clutch.

1.4k warmed up?? So what will be when it is cold?? Wont it be too high??

And svc guys use motul dot 4?? Can i get a can from them?? Its time to bleed my brakes. Its very difficult to source motul.. Tvs dot 4 sucks

**Ron Syl** · 02-13-2014, 06:47 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by siddharthsure View Post

1.4k warmed up?? So what will be when it is cold?? Wont it be too high??

And svc guys use motul dot 4?? Can i get a can from them?? Its time to bleed my brakes. Its very difficult to source motul.. Tvs dot 4 sucks

will be around 1.5-1.6k rpm.

sorry no idea about motul. @saquib or [MENTION=46690]TeeJayy[/MENTION] might know

**nadz11.ns** · 02-13-2014, 07:06 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by siddharthsure View Post

And svc guys use motul dot 4?? Can i get a can from them?? Its time to bleed my brakes. Its very difficult to source motul.. Tvs dot 4 sucks

SVC use DOT-3 brake fluid.

You can get Motul DOT-4 brake fluid fom any motul dealer or else you can also use Bosch DOT-4. I also used the same.

**anishbora** · 02-13-2014, 07:14 PM

Re: Yamaha YZF-R15 version 2.0

Hello guys!!
I have had a really annoying time with my bike and the SVC. My bike has only run around 2.5k kms in almost 11 months. A sound comes from the engine post 6k RPM, irrespective of the gear. Also, while doing engine braking in a lower gear, a 'tak tak' kind of sound is heard. When i showed it to the service centre, the mechanic said that he could not even hear it and said that there was no problem with the bike. This was around September. Went again, and this time another mechanic rode the bike and said that he did hear the sound and asked me to drain my fuel tank (had more than half a tank) and then change the bunk from where i fill petrol. Siphoned out the petrol at a local garage. The guy at the garage said that the petrol was good. Anyway, filled petrol from another bunk and rode it for a few days, but the sound was still there. When i went back to the SVC, they asked me to visit after Durga Puja as they were very busy. This was in October. Still i was patient enough. After Durga Puja, i couldn't visit the SVC, due to some work. So, went in December, to get my 4th free service done. That time also, they could not fix the problem. There was one mechanic, who even said that: "Why do you need to take the bike beyond 6k RPM? At 6k RPM, your speed would be around 150 kmph." This is exactly what he said. Despite showing the sound again and again, they couldn't rectify it. Became really furious and mailed Yamaha about the problem. They responded quickly and the SVC called me a day after sending the mail and asked me to pay a visit. Went there, and this time, another mechanic checked my bike. When i showed him the sound, he said that he would not be able to kill the sound. He asked me to ride another R15 to confirm. Did, and it was smooth as ever. No sound, even at 9k RPM in the first gear. He said that he would deliver the bike the next day. So, when i went the next day, he said that he had adjusted the tappets, and tightened the head bolts. Rode the bike, but the sound was still there, but it felt a little bit smoother. Was in a hurry, so couldn't check properly and had to leave. The next day when i rode the bike again, the same problem was still there. Called the Yamaha help-line, and the representative asked me to reply to the complaint closure mail. Did that. After a day, they replied, telling that the serive centre is ready to rectify the problem. Went there, and this time, the mechanic who is certified to service the R1 bikes, looked into the matter. So, after he rode the bike, he said that the sound was coming from the tappets. The sound was increasing much more, with increasing RPM. After around two-three days, he called me and asked me to collect it. This time, i checked it really well, and the sound had vanished. It was smooth like the other R15-s, Was happy about that. He said that he had changed the rocker assembly. After riding it for around 200 kms, the same sound started to become prominent again. Noticed it first, while doing engine braking. After few days, the sound came back, just the way it was. Felt really depressed, and the day before yesterday, i again took it to the service centre. This time, that same mechanic, did not even agree to have heard any sound. I made him ride behind me and pointed out the same sound, and yet he said that the bike had no problems. Felt really helpless, and today, called Yamaha and complained again. They said that they would revert within 48 hours. As the sound is the same, i'm sure that it is because of the tappets only!

I really don't know that what i should do next! Please help me guys!! What is supposed to be done, if the SVC doesn't cooperate?

Thanks in advance!

**aditya_YZF-R15** · 02-13-2014, 07:20 PM

Re: Yamaha YZF-R15 version 2.0

2-3 of you guys wanted me to post pics of how the rear looks with the full hugger off, so here goes some low res pics..

Attached Files