1980, friend had a KZ1000. I had just finished helping my friend get his 428 70 Mach One put together. Open headers, no hood... took it for a short test drive. Met The KZ at the light, he wanted to race to the next light... he said all he saw was a front tire by his head them we were gone... and that was one of the fastest production bikes that year. 428 was 12:1 compression, race cam, aluminum heads from Ford racing, and a massive shot of nitrous we didn't test until 6 weeks later and had wheelie bars on the car.
That engine was reliable, we went out to Idaho with it and while crossing Montana got several of the wasting natural resources tickets... for doing 140mph in between towns with no other traffic(we slowed down to 60ish for traffic and to speed limit for towns). One of the cops asked for a short ride so I hopped in his cruiser and followed LOL Ahh the good ole days of $5 tickets...