I currently ride a 1992 with 44xxx. So far this season I have spent 475, and have a boatload more to go. I personally put the last 11k on it. I am looking at time to do a major overhaul, Or an engine swap. I was wondering if anyone knows what engines are compatible with this frame. I am aware of the Zx9, however not the years. And I am thinking if i was to do a swap, I want to possibly do a Fi motor. However I do not want to ruin my bikes handling, with too much weight. I would like to be able to do a direct swap, without having to cut the frame, or change the angles. I have no problem doing the work. I know that any swap is a big undertaking, but I just love this bike and want to keep riding it. Any help would be greatly appreciated.