[Balaji]

Before you call me crazy , please hear me out . 
Let me try to explain. Say I ride for a while and then take a short break.When I resume the ride again from stop , the engine revs very freely ,I feel drastic improvements in engine refinement but for a very brief period of time ( like 30 seconds) and then it gets back to what it was , little rough and vibey.
I have always felt this but never understood why , thought I was making this up in my mind until my buddy told me the same.
Could it be related to the engine oil circulation ? If I could find out why , I may find possible ways to extend that elevated level of refinement through out the ride.

[motomataya]

Maybe the fuel injection in going to a richer colder engine mode. Just a thought.

[gashousegorilla]

Before you call me crazy , please hear me out . 
Let me try to explain. Say I ride for a while and then take a short break.When I resume the ride again from stop , the engine revs very freely ,I feel drastic improvements in engine refinement but for a very brief period of time ( like 30 seconds) and then it gets back to what it was , little rough and vibey.
I have always felt this but never understood why , thought I was making this up in my mind until my buddy told me the same.
Could it be related to the engine oil circulation ? If I could find out why , I may find possible ways to extend that elevated level of refinement through out the ride.

  Oh... what the hell, I'll go down the Rabbit hole on this one.          Or perhaps... something is heating up?  Metal and rubber expand, bad seals , leaks at connections and seats and what not ?    Ummmmm....  ?      Is your bike an export bike ?  Does it have an o2 sensor ?

[dginfw]

Indian domestic market bike? Carburetor or fuel injection?
If injected maybe its going back to open loop once the igniton is turned off then switches back to closed loop after a preset amount of time?

[Balaji]

Both the Indian domestic 500 with no o2 sensor and the carbureted 350 experience this. Mine is a 2016 one and his bike is from 2013. We are quite "bamboozled" on why this happens. I am definitely not trolling in here.

[Rattlebattle]

Well, I've fitted a carb to my C5. I can't say I've noticed what you describe but my guess is that when the engine is left warm there is a degree of fuel evaporation. When the engine is started it runs a little differently for a while until the normal fuel flow is resumed. Only a guess, mind....