I mailed in my wife's zx4rr, and my zx10r ECU's, and the final product is amazing. The bikes were brand new 2025's (the only new things we've ever bought ourselves) so we were a little anxious and definitely weary of letting someone reprogram the computers. I emailed Nate back and forth for about two weeks before we mailed them in. He had no idea if I would actually go through with the process, or send them somewhere else, but he got back with me same day and was glad to answer any and all questions I had (even though he covers most of the stuff in his YT videos). The entire process was even better than I expected, and the bikes, wow it's like riding different machines. He did everything he said he would do, and when he says "you have to try it to believe it", he's not kidding. From the throttle, to the extra power, to the bikes running cooler, it's all totally worth it. There are some cheaper guys out there, and a whole lot more expensive guys, and knowing what I know now, I would gladly pay it again. He's earned a customer for life! You don't know what you're missing, mail him your street bike's ecu and prepare to be amazed! read more