I am planning to buy a duke 250 now. Is it better to wait for the bs6 duke 250 or should I go for it now?

If you are looking for vehicles with discounts, the end of this year would be the best time to buy a BS4-era bike. As manufacturers gear up towards getting their BS6 products on the road, they will be offering significant discounts on their BS4 counterparts to clear stock. They would try to do so well before the April 2020 deadline to avoid any unsold BS4 stock. So we expect most manufacturers to stop selling BS4 bikes by early 2020. You could go bargain hunting then as the few unsold stocks could attract huge discounts. The reason to go for a BS6 vehicle despite the increased costs would be the added features. Also, you would be polluting the environment less. a transition from BS4 to BS6 has in most cases resulted in a minor drop in power. According to the upcoming emission norms, BS6-compliant two-wheelers should be 25 percent cleaner than their BS4 counterparts. While BS4 vehicles are currently allowed a NOx (Nitrous Oxide) pollutant level of 80mg/km, BS6-compliant vehicles will have NOx levels reduced to 60 mg/km.