I have a Frankenstein kit on my 1991 FLTC with stock 80 in EVO motor. No problem on power, the Frankenstein rear end only weights about 80 lbs. Most probably will not agree with this, but I enjoy working on my own bike and I cannot realistically do this with a bike under warranty. If you decide to trade your bike for the Tri Glide, sell your own bike (don't trade it) and buy the Tri Glide straight out. You will come out a lot better dollar wise.