Q. What is the actual mileage and how is the Overall performance & comfort - Thunderbird 350?

To be precise the mileage is somewhat between 40-45 kmpl , talking about comfort You can go for long rides and cruise around in the highway. No problem with the Performance wise. Its pretty good if you are looking for a cruiser. But yes, there is vibration at high rpm U know royal enfield has that thing in their bikes...

I have completed 2200 kms in my Tiago diesel. Mileage is 25 kms plus. Eide quality and engine performance is very good and the mileage makes me very happy. Silent Diesel engine is a plus point. I have changed engine oil twice in 2000 kms.

Guaranteed mileage on any surface road would be 30 even in the city but when you are riding on a flat and plain highway , it may depend on Upto 35 maximum, not more than , it’s from my experience since 2 yrs. enjoy riding.