You couldn’t pay me enough to ride this bike
This is the black one, I also have a blue one, at 13 lbs boost your hands have a problem holding on to the bars. Forget about watching the tack, once spooled, it's shift shift shift.
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Very nice looking bike. Looks like an ATP (American Turbo Pak) conversion. According to my memory, they bought their first GS750 for conversion from Southland Cycle Center in Garden Grove, California, when I was working there, around 1976. It may have been their first turbo conversion. When they were done, I could have bought it back (without the turbo) for a really reasonable price. A couple of years later I was working at Phoenix Kawasaki when the first KZ900/1000 conversions came out. We got an LTD and a Z!R. Boost from the factory was set around 5lbs as I recall and if you set the waste gate any higher (I think you could go to 10lbs) you were supposed to get the crank flywheels welded. We took the LTD (I think; it might have been a regular KZ) out to Beeline raceway in Phoenix to see what it would do. Of course we screwed the waste gate way down, and the heck with welding the crank. I was low man on the totem pole in the shop, so the shop foreman and “ace” mechanic let me know they’d ride it first, me not at all. When we got to the strip they put on a comedy show between themselves of ‘Okay (name withheld) you can ride it first, and “No, (name withheld) you can ride it first”, finally agreeing that I should ride it first since I was the only one of the three who had ever ridden a motorcycle on a dragstrip (my CB750K0 Honda in Oklahoma City at the now long-defunct San-Val Raceway in early 1970, where I had also run my ‘65 Dart GoGo in 1966.) My recollection is that it had no torque to speak of below 4,000rpm, whereupon it came on the powerband all at once. Getting a start, especially with the small stock rear tire, resulted in a bog, turning into tire smoke, and the stock KZ chassis flexing like it had a hinge in the middle. It got real squirrelly at the end of the quarter, when I noticed the front wheel was off the ground going through the traps. When I got back to the pits, the other guys said they’d pass. I made several runs that day, playing with tire pressure, etc, but it was pretty much the same story. All that said, an H2 750 was just as much of a handful with a stock tire. I built one for a guy ported to Denco specs with big carbs and Bill Wirges pipes, among other mods, that would stand straight up at about 65mph. This was long before the killer Suzukis, Kawi’s and Hondas we have today. The quickest bike I ever rode off the line was an RD350 Yamaha modded up with a bunch of trick RZ350 parts and road race slicks. When it came on the pipe, it was all you could do to hang onto the clip-ons and stay on the bike.