The Bajaj Pulsar NS160 dual disc variant is originally designed to accommodate a specific tire size for optimal performance and safety. The recommended rear tire size for the Pulsar NS160 is typically 120/80-17.
While it might be physically possible to fit a 140 rear tire on the bike, it is not advisable to do so without considering the potential consequences. Modifying the tire size can affect various aspects of the bike's performance, including handling, stability, braking, and fuel efficiency.
A larger rear tire may alter the bike's handling characteristics, potentially affecting its stability during turns and at high speeds. It can also impact the accuracy of the speedometer and odometer readings. Moreover, installing a wider tire may require modifications to the swingarm, fender, and other components to accommodate the larger size.
To ensure optimal performance and safety, it is recommended to stick with the manufacturer's recommended tire size or consult with a professional mechanic or the manufacturer themselves before making any modifications to the tire size on your motorcycle. They will have the expertise to provide guidance based on the specific model and its engineering specifications.