WANT!!!
I’ve always wanted an XR-750, but they’re REAL race bikes, IE you spend more time working on them than riding them. They’re incredibly finicky, and everyone I’ve ever read about trying to put them on the street has been a nightmare. They’re just awful riding on the streets.
OTOH, the guy who built the frames used by many of the winningest Grand National bikes for top riders, including the factory HD team, former AMA champion Mert Lawill did try building one. Mert was building a street version, the Street Tracker, with a stock Sportster bottom end, and his custom heads, retaining the dual right side carbs and left side high exhaust. I believe he sold every one he built before they were even finished (about 30 bikes in total.)
Last I heard he had gotten out of motorcycles, building mountain bikes and prosthetic devices.
Mark