In this tutorial, we learn how to replace the gas tank on a Ninja 250R motorcycle. First, inspect all the parts to make sure they don't have any cracks in them and everything is complete. After this, remove the gas tank off your bike and transfer the gas cap from the old to the new. Now, turn the gas tank over on the other side so you see the bottom. There will be a circular cap that you need to remove, followed by four 8mm bolts. After you loosen these up, switch out this part onto the new gas tank. Now, gently place your new gas tank onto your motorcycle by following instructions that came with it. Make sure it's securely in place and add gas into it so it will run!