400ex Rev Box

Is it worth getting an aftermarket CDI Box. Ive heard that they are bad for you bike and pointless to put on. I just want to get a little more power out of my bike before I decided to finally bore it out.

 

I have the same quad and my boss said with a 440 big bore, cam, knn and full exhaust it would be smart to get the rev box to help unleash the power. I would recommend getting a bigger oil cooler like from a 2005 Yamaha 4x4 with a cooling fan.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now