Thanks for your suggestions. Even I don't like the rider's position which KTM, Yamaha and Bajaj offer in their popular bike segment. However, KTM comes with a very refined and responsive engine but I hate the saffron color like anything which they use in their logo and bike rims.
Bajaj has also introduced another bike model "Dominor" in higher CC segment copying the KTM Duke 390. It's a 400 cc engine bike, a copycat of KTM duke series. It's a bit reasonable with a price tag of 1.5 L on road price but I didn't like it while taking test drive coz of sitting position of rider.
It's rumored that effective April, 2018 Government is going to make ABS (Anti-lock braking system) mandatory for all the two-wheelers above 125 cc. I personally believe that the kind of congestion we find on Indian roads, ABS can be helpful in preventing sudden falls of bikes and same will be equally useful in mountain terrains as well. So the options have further narrowed down to KTM, Bajaj Dominor, Honda CBR250 as all come with ABS under 2L price category. Sooner or later RE will have to equip its bikes with ABS. As far as Kawasaki KLR650 is concerned, it's expected to be launched in India between 4-8 L price range. I don't want to stretch my budget beyond 2L for bikes. A 500 cc RE Thunderbird (TB) will cost me 2L approximately. The major difference between 350 cc and 500 cc TB is fuel system where former comes with carburetor while latter with fuel injection. I personally in favor of carburetor as it's easy to tune while fuel injection is a micro-processor controlled fuel system which complicate things if it gets failed and a pocket burner when it comes to repairing.
I think I should go for a test drive of RE TB to make up my mind else I'll end up with nothing but speculating the matter.