2. Re-jet the carburetor. When you remove the baffles from your motorcycle's exhaust, it will increase the airflow through the exhaust system. This can lean out the air/fuel mixture, which can also cause backfiring. To correct this, you may need to re-jet the carburetor to increase the amount of fuel that is flowing into the engine.
3. Install an aftermarket exhaust system. An aftermarket exhaust system that is specifically designed for your motorcycle will be more efficient at reducing backfiring than a stock exhaust system. This is because aftermarket exhaust systems are typically designed to improve the airflow through the exhaust system and prevent the buildup of unburned fuel.
4. Check your spark plugs. Worn-out or fouled spark plugs can also cause backfiring. If your spark plugs are old or dirty, replace them with new ones.
5. Make sure the timing is correct. If the timing on your motorcycle is off, it can cause the engine to run erratically, which can lead to backfiring. To check the timing, refer to your motorcycle's owner's manual.
6. Check for air leaks. Air leaks in the intake system can also cause backfiring. To check for air leaks, inspect the intake manifold and all of the hoses that connect to it. If you find any leaks, seal them with silicone sealant.
7. If all of the above checks out and you are still experiencing backfiring, it is possible that your exhaust system is too large for your motorcycle.
- Check the system against specifications for the proper fit.
- If necessary, install an exhaust system that is the proper size for your motorcycle.
