The Rickman brothers made a name for themselves by building incredible frames to put (usually) Triumph motors in, but in the 70s they also expanded to building frames for Japanese bikes like the Kawasaki Z1 and the Honda CB750. This is one of the latter, which can be summarized from a quote from the Rickman brothers themselves:
“The Japanese produced very good engines, but they put much less attention into their chassis,” “We developed our own frames to accept those new four-cylinder engines. Our kits handled very well as compared to the production models.”
The engines were left untouched, so you got the usual 736cc inline four that produced 67 horsepower. But instead of a bike that some described as “wobbly” at 90 mph, the Rickman frame (made out of 531 Reynolds manganese-molybdenum) made this bike sure-footed at even three-digit speeds. For more on the Rickman Honda CR750, check out this article from Motorcycle Classics.
Find this Rickman Honda CR750 – sorry there aren’t many details available on this specific model – for sale here at Michael’s Motorcycles for an unknown price (guess you’ll have to call) in Saint Louis, Missouri.