There are several ways to improve the mileage of a motorcycle with an exhaust system:
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Use a slip-on exhaust system: Well engineered and designed Slip-on exhaust systems such as Barrel Exhaust are a good way to improve mileage as they can increase horsepower and torque while reducing weight. This is the easiest way to improve the power to weight ratio and improve acceleration.
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Use a high-performance air filter: High-performance air filters can increase the amount of air flowing into the engine, which can improve mileage. To compliment the free flowing exhaust, you may require to feed the engine with more oxygen to burn fuel better. A free flow air filter can definitely give that little boost and extract more miles from the same drop of fuel.
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Tune the carburetor or fuel injection system: Tuning the carburetor or fuel injection system can improve the air/fuel ratio and increase mileage. The issue is the engine must not be running to lean or too rich. The optimum needs to be arrived at and this is possible only by experienced and talented mechanics. Not everyone is an expert in tuning the carburetor. Running too rich can lead to wasting excess fuel as unburnt residue in the exhaust system. You can identify that with a sticky carbon soot in the tips of the exhaust system.
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Use synthetic oil: Synthetic oil can help improve mileage as it provides better lubrication and reduces friction in the engine. Reducing friction is directly going to to impact the mileage as the motorcycle has less drag to overcome and go further. Synthetic oil improves life and reduces friction to a great extent.
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Regularly maintain the motorcycle: Regular maintenance such as checking tire pressure, changing the oil and air filter, and cleaning the fuel system can help improve mileage.
Keep in mind that mileage is affected by many factors apart from the ones listed above. Keep in mind to check the below before you complain for low mileage.
- Excessive weight on motorcycle
- Excessive use of clutch and brake
- Sudden acceleration and Sudden braking
- Unnecessary idling of engine
- Low quality fuel
- Clogged Air Filter
- worn out tyres
- misaligned chain sprocket
and it's best to consult a professional mechanic to determine the best course of action for your specific motorcycle.