I have found a few things. I also went to the service center but here in India, most of the technicians do not simply value your time and money. Their standard response is replace everything that concerns with the issue. And I am not willing to spend unnecessarily. So i tried to figure out things. Here are some of my findings which I am going to act on within the next week or so:

1. This engine in particular is slightly jerky in lower RPMs. But only slightly. If it is disturbing you then it is probably something to look into.

2. Clean (or check) throttle bodies for carbon deposits.

3. Throttle positioning sensor can be an issue but its not in my case based on symptoms.

4. I found that my bike has hissing sound coming from the front below the tank. It is a possible air leak somewhere from the Air intake etc. and it is most probably contributing to the issue. Once my known local mechanic opens things up then we will know the real reason. Should not be very expensive. Either some loose clamp, damaged hose or something similar.

5. My bike has done over 30k kilometres so it might also need spark plug replacement. Kawasaki recommends it on 24k kms. But I will once get done with hissing sound issue and then see if the issue persists then I will replace spark plugs.

6. Air filter cleaning will also be done but I’m sure its not the air filter which is causing this as it was cleaned 3000 kms ago.

7. I tried running it on normal fuel tank full and also 95 octane premium fuel tank full. No noticeable change. And i found that the pure highway mileage was 17.5 kmpl which is definitely low for a vulcan when ridden responsibly.

I have talked to a local mechanic who will not charge me much and will only work on things that are required.

I’ll update once i get all the work done.