I have 2016 gsxr 1000. I did a motor swap (long and embrassing story) with another 16 gsxr 1000 motor. The motor only has 1,639 miles. I brought it from a seller on ebay. Me and the shop said the motor looks to be in perfect condition. After the install i hear a knocking sound after 3500 rpms; and the bike seem lack of power as well. I have a video hopefully i can post here. Im new to this site but not gsxr bikes. Any help would be greatly appreciate it. My end goal is not to total this bike and start riding my bike as it was suppose to be my first brand new bike. All my other gsxr bikes were used. If anyone can suggest how to post videos on here please let me know.