A fully modified exhaust system forces the bike to consume a different level of fuel properties than previously.

That having been said, retuning your motorcycle becomes almost mandatory when you install a full exhaust system on your bike.

Upgrading the exhaust manifold to full makes it mandatory to retune your motorcycle. When you have a slip-on exhaust or high-flow air filter inside of your bike, you may get away with it without retuning your motorcycle though it is customarily essential to mention that you can also benefit from retuning your motorbike even you have such conditions.