Has this issue been solved? If you still have it and had it when it was cooler weather then there's definitely something clogged in the cooling system there.
Don't know if it requires a replacement of the entire radiator but something is not working properly there.

When the radiator on my bike kicks in it needs 1-2 min to lower down the temp to 2 bars below the hot zone when the fan goes off. Only couple of times it happened that the engine got so heated that it took 3-4 minutes for the fan to go off.

Give it to the service center guys and if they don't manage to fix it demand a radiator replacement.
At least it's easy to check if the fan works ok, just let the engine run in SC in front of the guys there and see how long it takes for the fan to cool down the engine when it gets hot...

Check for bent radiator fins, bent fins affect radiator performance and also try to bleed the cooling system.

Somewhere on this thread someone mentioned that Motul 300v engine oil helps keep the temperature lower. I am still running on stock Bajaj Engine oil, and will be replacing it with 300v on next service.

Though there are a few bent fins, I don't think they will so drastically reduce the performance of the radiator. Besides I had noticed that the one time I cleaned the radiator thoroughly after the monsoons, the performance did seem to improve, but it soon came back to where it was after 2-3 days.
Besides the radiator is not so dirty now.

The mech at svc is already aware of this. It was demonstrated to him 3-4 months back. But I didn't bother much after that owing to the fact that the temp bar always kept 1 bar below the Max in normal region and that I didn't want to part with the bike for a week.
But now it seems I have to. Actually now that I think of it I should have told them to get it fixed when my bike was there for a full month getting a new chassis. It'd would have been easier for them too I guess. Mistake.

Speed is not high octane fuel. It's the same RON as "normal" fuel, which is 91. This is not a fuel issue at all.

Thanks to every one and sorry for the delayed response as I was out of reach.
The problem with the chain has been resolved when I took my Duke to the Service center.
There Mr. Harsha took a ride and found that the problem was not a big one.
He directed one of the mechanics there, to clean the chain and lubricate it. The problem was, during the time of delivery the bike had a water wash(To make it ready for Teflon coating). I asked the mechanic to lube the chain. He said Yes, but Myself and him both forgot about this, as we were listening to the demo from Ravi (KTM Engineer). After that a couple of Rainy Days... so, the chain got totally dried and started sounding weird.

From this I learned a lesson to lube my bike's chain when ever it gets wet.

New chassis? What happened, forgive me if it's detailed back a few pages, if you refresh that'd be great.

Cheers!
VJ

Guys have clocked in just 2628kmsand the bike wont start makes a karr sound and indicates low battery warning.how can the battery go kaput so early ??

That karr sound indicates, the starter motor isn't getting enough power to crank the engine. Yes it is indeed a sign the battery is low. But instead, just see if the battery needs charging, or some prolonged electrical activity either knowingly or unknowingly. Just top it up and recharge the battery and then see how it unfolds.

I hope it's still under warranty, and the battery has 1 year warranty, do get it replaced at your SVC if the need be. But case in point, recharge it first, let the SVC guys know about this.

Cheers!
VJ

Thank you sir for the prompt reply,
so I gather I should inform the SVC and get the battery charged ,yes the battery is under warranty since i bought my bike only 2 months back
the 2628 kms are the only experience I have on a motorbike and can assure you no prolonged electrical activity from my side knowingly...not very sure what u mean from unknowingly though

Yes two months is very very early life for a battery to go kaput. I guess it's just a one off situation, at least as far my experience serves me. Get it changed if the need for peace of mind.

Cheers!
VJ

Man I had met an accident. Chassis was damaged(bent). Was doing tripe digits on the palm beach road on New year's eve. A car waiting on a crossing(it was signalless) took a sudden turn. The chassis which comes from the vendor does not have a number. You need to go to the RTO and get a new number and then find a place which embosses the new chassis number(which is very harrowing exercise I should tell you as most guys are afraid to do it because of fear of legal hassles)

This needs a separate post. So mods please bear with me.
I was on my way to Panvel in the morning to get the chassis number embossed on my chassis. I was happy. Finally after days of running around I was finally able to get it done. But I would get happier. Had a fireblade whiz past me on Palm beach road.The sound was intoxicating. Went there, got the stuff done. Was happier. Just when I thought I couldn't be happier, saw a Ducati 1098 on the palm beach road along with a CBR 250R. I was ecstatic. Took a right turn to KTM sewoods at Nerul. Had to get the shocker setting set to a stiffer 6. Wanted to take those sweet turns at Lavasa with elan tomorrow(The KTM Lavasa ride event). More happiness. Saw a gleaming white Ninja 300 at the svc waiting for PDI. Aaaah....it was a looker man. The NInja 250 looked like a Passion in front of it man!!!(no offence to 250R owners). The exhaust note is great too although not much different from the 250R. And no ABS btw. I heard OTR Navi Mumbai woud be 3.85.
Ok so I thought it was some day and was chugging along happily to home. But no. This is an unfortunate year for me. Shouldn't have been this happy. Because I ahd to pay for this happiness. For some reason I did something I never do!!! I eneterd the wrong lane to save some time. Baaammmm!!! had a collision with a CBZ extreme guy. Chassis bent again, the T gone. fork misaligned!! So looking at another chassis change, though the mech says the dent is minor and I don't need too. I feel like the most unfortunate guy on this panet man. Do I need to earn riding a over again? Do I need to be more careful. I am filled with so many doubts.

@ doga : Jeez. Sorry to read this... I feel ur pain on having a damaged ride... worst of feelings... :-(

3 fundamentals of biking:
A = Accelerator = Alertness
B = Brakes = Balance
C = Clutch = Confidence + Common sense
Oversight on any one of these is often fatal.

Just be more prudent in the future.
In the hindsight, u should be glad to be alive. :-)

Ive lost 35% of my internals in various accidents, due to mistakes done by OTHER riders over last 2 decades.
Just consider yourself lucky to have escaped unhurt n be careful going forward.
Machines can be replaced / repurchased but this body-machine assembled by the Lord can never be fixed to its original form, once it's deformed.
May the force be with u.
Peace...

@Doga Dont worry, you're not the most unfortunate guy on this planet, because you've survived both those accidents. We fall, we learn, pick up and ride again but take it easy for sometime, get back to the roots