If it really is a Super Flash clutch you are a lucky man, even luckier if it comes with the triplex chain and matching crank sprocket. It may fit a S/A bike with the aid of a a new, longer chain and the splined gearbox input shaft from a Plunger box to match the splined centre. The shaft will fit, but chain alignment may be a problem. Bear in mind that with triple teeth, it could actually be a common A65 clutch, with a tapered centre and built in cush drive, but even if it is genuine Super Flash, leave it for later and get a running bike using standard parts...its not worth the hassle, the clutch for your bike is considered to be almost reasonable when set up correctly.
Swarfy.