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Take it to the service station, i would suggest.

the Cat Con is the concern, the bent pipe should not change color, which is common in may occasions, but take it to the SC and get it checked

I had read most of the time that Bend Silencer is not for new bike, atleast after 4-5k kms.
Did you installed the offroad silencer from SVC ?

I have not installed any off road silencer. Its the standard OEM Bazooka. The burnt smell has died down a bit. I am hoping this has occuurred due to adulterated petrol. I am thinking of taking it to Service Centre on its 500 km mark which is due in another 150 km. Is it ok if I wait till 150 more km?

Actually colouring of the bent pipe is not exactly an issue of extra rich carb setting (although it may indicate a non ideal mixture at times). It happens with a little off-set timing when the exhaust valve opens even before the ending of power stroke / onset of exhaust stroke sending unburnt mixture out into the exhaust. This is a common example (although not inevitable) of slightly RETARDED timing & since your mc is new, I guess it was done on purpose to aid the engine run-in & to keep-away from any chance of spark-advance/ping which may occur due to over-carbon accumulation in your engine on account of extra rich setting (again done on purpose to keep engine cooler & safe during run-in).

It's a matter of erring on the right side ! I would say, don't worry if your bent pipe has not become orange in colour by now !
During 1st service, the service guys will definitely slightly advance the timing & tune the carb for normal setting.

Ride safe. Happy thumping.