To exchange your Bajaj Pulsar 220F for a Yamaha R15S, you need to consider several factors, including the market value of your current bike, the price difference between the two models, and any additional costs or incentives involved. The Bajaj Pulsar 220F is priced around ?1.42 lakh and is powered by a 220cc engine producing 20.4 PS of power and 18.55 Nm of torque, with features like a digital instrument console, Bluetooth connectivity, and disc brakes on both wheels. In contrast, the Yamaha R15S is generally priced higher, ranging from ?2.17 to ?2.49 lakh , and is powered by a 155cc engine producing 18.4 PS of power and 14.2 Nm of torque. It also features a digital instrument cluster, disc brakes, and ABS. You would need to get your Pulsar 220F valued by a dealer or through a vehicle valuation service to determine its current market worth. Then, you can negotiate the exchange with the dealer, considering the price difference and any trade-in incentives they might offer. Additionally, you may need to pay the difference in price plus any applicable taxes and registration fees to complete the exchange.