The Kawasaki Z650RS price in Bhuj starts at ₹6.65 lakh (excluding taxes, RTO charges, and insurance). Meanwhile, the Kawasaki on road price in Bhuj is ₹7.73 lakh.
Since budget and engine size aren’t concerns, and considering your physical condition, we recommend the Kawasaki 650 range - Z650, Ninja 650, or Z650RS. All three are easy to handle in the city and powerful enough for highway use. Their plush suspension setups will also help with your back issues.
If you want something that's not as big as the Kawasaki 650s, you can take a look at either of the Honda 300s - CB300F and CB300R. Both are lightweight machines with low seat heights as well as comfy suspension setups.