I got a kfx 450r not too long ago and have had nothing but problems since. I've pretty much taken the entire thing apart and put it back together. Finally, I got everything back together and got to ride it a few times only to find out that the PC3 that was on there is dying now. I need recommendations on a replacement unit. Should I just stick with a new power commander, or should I get a different brand. What do people recommend? The only mod on the quad is an aftermarket intake with the airbox lid removed. I intend to add a new exhaust at some time in the near future. Is an ecu necessary even?