Just thought I'd update this thread with the information I have received so far about the parts and prices.
St-1 Camshaft 86,000 yen
High compression piston kit 12:1 98,000 yen
Cross mission (what the hell ?) 175,000 yen
Fuel injection adjuster (inc setup) 58,000 yen
YDS design cowling, original seat rail, aluminium tank for street use, discharge headlamp, magnesium rear step 198,000 yen
Kaw - getting the rest of the information soon.