Back when I was in the Army I had a Honda 600F1. Fun bike, sold it when I went to Germany. Never did get another bike. My father tho that's a different story. He worked in bike shops/had his own for decades.
So one day a friend of his gave him a 76 Kawasaki 900 for free. A couple weeks later he rolled it out of his Frankenstein works garage and turned it into this.

This is the first iteration of "Lady"
He still has her and she has gone thru radical upgrades over the twenty plus years he has been refining her.



It's now a 1238, 300 HP at the back wheel. Weights in at a slim 410lbs with four gallons of gas in the tank. No electric start, it's a kicker. There are only two wires when you get off the engine on the rest of the bike, headlight, and brake light. The steer tube and the down tubes in front of the engine are all that are left of the original frame. But the VIN in stamped in the steer tube so it's still licensed as a 76 Kawasaki 900. Forks and wheels are from a GRXR1200, head is from a 1200 Police interceptor, barrels are after market drag bike, 12to1 compression, racing fuel only.
The thing is an absolute beast. I have rode with him a few times and so often cafe bikes will try to race.... dropping gears, revving what have you.... all he does it is roll the throttle on and hes gone....