The issue you described, where the handlebar of the Bajaj Pulsar NS200 hits the fuel tank when turned fully to the left or right, can be due to a few possible reasons:
Steering Stopper Limit: Motorcycles are designed with steering stoppers or steering limiters to prevent the handlebar from turning excessively, which can cause damage to the components or affect stability. If the handlebar hits the tank, it might indicate that the steering stopper limits are not properly set or adjusted. This could be a manufacturing issue or a misalignment during assembly.
Handlebar Position: It's possible that the handlebar position or alignment is not adjusted correctly. The handlebar might be mounted too close to the tank or not positioned at the ideal angle, causing interference when turning. Adjusting the handlebar position or installing spacers might help alleviate the issue.
Aftermarket Modifications: If any aftermarket modifications have been made to the motorcycle, such as different handlebars, risers, or steering dampers, they could potentially affect the clearance between the handlebar and the fuel tank. In such cases, the modifications might require adjustments to prevent interference.
If you're experiencing this problem, it is recommended to consult with a qualified mechanic or authorized service center for inspection and potential adjustments. They can diagnose the exact cause of the issue and provide appropriate solutions. It's essential to address this problem to ensure safe and comfortable handling of the motorcycle.