Hey guys, this is my first post on this forums and I'm just starting to get into bikes. I picked up a 1999 gsxr600 with a bad motor. I understand its still carbureated so it shouldn't be a big deal to pull it out at all, however what motors from what years will drop right in? I'm assuming 1996 - 1999 600 gsxr motors are direct drop ins, or did the mount locations change throughout those years? What about a 750 motor as far as a direct drop in? I'm not really looking to make the bike faster, just looking to get it running with minimal work and money. The guy I bought it from believes it floated a valve, however the motor and tranny are also high mileage so I'm not sure I want to bother rebuilding it anyways. What year 600 motors can I expect to directly drop in and what should I expect to pay for a good used one? Thanks.