Originally Posted by Admin

Yes you can feel the difference. You can go as large as you want providing your motor can use what you're feeding it. That's the determination you need to make. If you bike is a bit more than stock (which is what it sounds like from your post) then go with the 14/14.

Need more bottom end performance? A carb probably won't do what you're hoping it will do. There's other easy mods that will do this much easier such as a good pipe, rocket key and of course gearing.