Ok guys, here is a thought and hopefully someone with knowledge of this workings will chime in. I have a six wire set up on my regulator(2 plugs) 3 yellow in one and 3 (black, green, red) on the other plug. The rebel 250 has only 5 wires (2 plugs), but the rebel 450 regulator has the exact same # of wires and the exact colors too. Will I hurt anything on my charging system if I use the regulator from a bigger engine? If it's a six wire set up on both it should work? Thanks and hope to hear from someone soon!!!!!!!