How are the EFI Controllers??

[JRF450]

You can see most of my upgrades in my signature and I think my quad runs like a raped ape, but has anyone had any experience with the EFI controllers??? Are they worth the money, and how hard are they to use?? Also are there any more bolt on mods you would suggest before getting the controller??

There's no such thing as too fast!!

[R450HQ]

Try the search button, many good threads on this topic