C'mon, don't you guys have one of those in your basement? I do, but mine has suspension all the way around. That's a real early non suspended trike. There were tons of r5, rd350 and rd400 motorcycles sold and there were lots of companies that made frames that fit those engines, both non suspended and suspended. Also there were aftermarket high performance parts to fit those engines. I have a set of the DG Sunburst Gold Heads for my rd350 engine. And yes, they are a part of the triking history. There were bigger engines too as well as companies that made kits that turned street bikes into 3 wheelers. The biggest problem was the street bike frames were very heavy, unlike the aftermarket frames. Alot of people laughed at the atc185s and atc250r when they came into production due to the fact that they were riding 350cc and bigger trikes at the time.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90