Nice- brings back memories- I had the little brother A1SS 250cc; ran the p*ss out of it. We called it the "ticket bike" ; everyone who borrowed it for a quick spin around the block invariably came back with a speeding ticket. Good times.
The banjo fittings on the oil pump are delicate- be gentle when tightening those. And the three-ball clutch releaser is kind of a weak point- you can see the case bulging from the force. But it works. Those rotary valves don't quit pumping fuel mix at high speeds like a reed valve design, gives very high RPM- they do wear though, and the case halves too. Enjoy.
Mark S.