@abhinig1 No need to worry buddy. Let me tell you I feel vibrations at 40-50 KM/H but its get butter smooth after 55 KM/H till 90 Km/H. 80Km/h is best speed from Royal Enfield Bullet 500.
If you don't want vibrations then go for Thunderbird of Himalayan. But there are various ways you can reduce vibrations.
1. Add Grip covers for your handle bar. On Amazon 'Trip machine' providing excellent grip covers.
2. Wear Gloves: I am using Cramster gloves and trust me these reduce vibrations a lot.
3. Never change stock silencer.
4. Last one enjoy the vibrations.