Here is a list of Aprilia SR50 Turbo mods:
HGT PFI Fuel Induction System
HGT Turbocharger system
HGT Fuel Pressure Regulator
HGT Frame Stretch
HGT Brake Levers
26mm BING Throttle Body
Hebo Manston Racing 70cc BBK
Malossi ECU
High Primary Compression Full Circle Crankshaft
Multivar 2000 / 6.5g Rollers
Red Contra Spring / Delta Race Clutch
BGM PRO Reed Block
Engine Block Matched Ported and Polished zuma Forums