You need to tune your horn as svjhonda said. You can do it with a screwdriver yourself or take it to SVC!

Thanks guys! So my diagnosis was wrong.

Any steps & tips on how to go about with the tuning? I'd prefer doing it myself than take it to the SVC for this tiny-weenie thing.

Tibby, i think this has something to do with the battery. Because i had the simillar problems before my battery got screwed up . So better get you battery charged also. Ihad charged my battery twice i did it in Bangalore wheels and Perfect riders both of them charged me around Rs 50 for it

Cool, will get it charged as well. i assume it takes the usual 2-3 hrs?

@All: Any info on how to tune the R15's horn?

its not a battery problem at all...i face the same issue..i noticed it first when two stupid girls came in my way while walking and were not getting side even when i showed them the passing light, so i honked along with the passing and the horn sounded like that of an ambulance!!
i put this up at the svc..that guy took a multimeter and checked the voltage at the battery terminals..it was well above 13 !!
conclusion - could be a horn tuning problem
or may not be a problem at all..

p.s. have a stock battery (MINDA) not charged externally even once..2months till now.

They gave you MINDA ? Some has gone really cheap now. BTW, i am on stock battery as well, but my R15 has TATA Green.

Did you do this on your own, or is this from the Singapore store? Is there a website I can see?

@tibby: veyron999 is right. My bike is now 27 months old&no battery issues (touchwood). The battery has never been charged till now&voltage was checked only once&found to be normal about a year back.
The horn tuning problem you are facing, I had it after the 2nd service (pressure wash can cause it). Its very easy to tune the horn-in other bikes since its exposed its very easy, in the R15 the mech will have to stick his hand into the gap between the handle&forks with a spanner. Matter of 2 mins.&he won't even charge you for it mostly.

why?isn't MINDA equally good? i asked the dealer, he said that the stock was coming fitted with MINDA only, the TATA greens were not coming any more...
as i said, got the bike just 2 months ago.

The horn can be tuned by turning the screw at the back of the horn...by turning it in either direction....The only problem is that the horn is placed inside the fairing so it can be a difficult process..

till the fast initial idling is concerned, i agree.. but the part where the needle sways back and forth during the above process is what i'm worried about..

I am sorry, i didn't wanted to give you a bad impression about Minda. It's not bad, but it's cheaper than TATA Green. BTW, my R15 is 1 yr and 10 months old, never recharged and no issues. Oh did i forget to say, i am using a 12V DC 3.5 Amp horn (high tone) without any issues.

It depends how good a relation you have with the svc. They may or may not remove warranty. The connection is simple. When you're sitting on the bike, the right side headlight lights up on high beam. That's because the right side headlight doesn't have a connection for the low beam filament. Just open up the LHS headlight leads (there are 3 pins). So first remove the black connectors on both sides, get a small length of wire and connect the lead (I think its the upper lead, out of the 3 leads) to the RHS side, properly. The lead has a hole in it, so you can wind the wire through it properly, and then attach the black connector back.

I'm sorry, that's the best I could explain. I'm a noob with electricals.
Simple, take off the LHS fairing, there's a small screw on the horn. I think tightening it makes the horn shrill and loosening it reduces its treble. So achieve the correct setting, with the engine running and the headlight turned on. try repeated horn presses and arrive on the perfect tuning!
Correct!
Bro, I saw both the videos now (In the morning I was browsing from phone). Even my bike does that! Any cold start, the fast idle mechanism calibrates the rpm so that the ignition is always stable. So it modulates rpm by 100 or 50 even! So unless the rpm needle fluctuates real bad (more than 200rpm + & -) it is not an issue.

phew! good to hear that!
btw i was just wondering at what rpms do you guys shift gears?

I had purchased mine in May..the bikes were having mostly Minda but the showroom guys changed mine from Minda to Tata that they took out from the other bike...It was done as the dealer is my friend....And Minda batteries are not as good as Exide or Amaron...

are u using HID?

btw one important news all chennai R15 showrooms and some MECH`s bull shit about the fork cone of the bike gone bad and u have to change the set fully. dont fall for it just tighten the cone and remove the fork bend if any you are good to go. courtesy <joel>

i am having an idleing issue with my bike the idle dosent stay