This is a simple sound replacer for the mod Advanced J3XMotorcycle which adds more realistic and better quality sounds for the bike, all the sounds were replaced. The sources of the sounds are free sounds found on libraries around the web. I do not own the sounds, but have the right to use them since they are free for the public, so you can edit them or re upload them with another mod as you please. All the credits of the mod go for the creators of Advanced J3XMotorcycle. 

In order to install the mod, simply extract the content into the data folder and click "yes" in order to replace the old sounds.