In general, it is possible to use a carburetor from one bike in another bike with the same engine displacement, but it's important to consider several factors to ensure compatibility and optimal performance. Here are a few key points to consider:
Compatibility: While the Discover 135 and Pulsar 135 may have the same engine displacement, it doesn't necessarily guarantee that the carburetors are identical or interchangeable. The carburetors may have different designs, jetting, fuel delivery systems, and throttle characteristics. It's crucial to compare the specifications and design of the carburetors to determine if they are compatible.
Fuel and Air Mixture: Carburetors are designed to deliver the proper air and fuel mixture to the engine based on various factors such as engine requirements, compression ratio, and emissions regulations. If you were to swap carburetors, it's possible that the fuel and air mixture may not be ideal for your Discover 135's engine, leading to suboptimal performance or other issues. Rejetting or tuning the carburetor may be necessary to achieve the proper fuel and air mixture.
Intake and Exhaust: The intake and exhaust systems of the Discover 135 and Pulsar 135 may have differences in design and specifications. These variations can affect the flow of air and fuel, which in turn can impact the performance and tuning requirements of the carburetor. It's important to consider these factors when swapping carburetors.
Power Gain: While it's possible that a different carburetor may result in some changes in power output, it's difficult to predict the exact gains or losses without detailed testing and tuning. Power gains, if any, may vary depending on the specific engine characteristics, tuning, and overall setup of the motorcycle. It's important to note that simply swapping carburetors may not necessarily result in significant power gains without additional modifications or adjustments.
Before attempting to use a carburetor from a different motorcycle, I would strongly recommend consulting with a knowledgeable mechanic or tuning specialist who can evaluate the compatibility and make any necessary adjustments to ensure proper performance. They can help determine if the Pulsar 135's carburetor is suitable for your Discover 135 and assist in tuning it for optimal performance.