It is possible to replace the underbelly exhaust of a Bajaj NS 200 with that of a KTM Duke 200, as both bikes share similar engines and components. However, it's important to note that modifying your motorcycle's exhaust system may have certain implications. Let's address your questions:
Compatibility: Since the NS 200 and Duke 200 share a similar engine, the exhaust systems may have some compatibility. However, it's advisable to consult with a professional mechanic or refer to the specifications and mounting points of both exhaust systems to ensure proper fitment.
Exhaust note: Changing the exhaust system can affect the sound or exhaust note of your motorcycle. The Duke 200 and NS 200 may have slight variations in their exhaust designs, leading to a difference in the sound produced. The Duke 200's exhaust might have a different configuration, muffler design, or internals that contribute to a distinct exhaust note. Swapping the exhaust could result in a change in the sound characteristics, but the exact difference would depend on the specific exhaust systems involved.
When considering any modifications to your motorcycle's exhaust system, it's essential to comply with local regulations, emissions standards, and noise regulations. Additionally, it's recommended to consult with professionals or experienced riders who have knowledge about the specific modifications you are considering.
Please note that modifying your motorcycle's exhaust system may have legal implications, void warranty coverage, and could potentially impact the performance and emissions characteristics of your motorcycle. It's important to ensure that any modifications made comply with the appropriate laws and regulations in your jurisdiction.