Gilera Runner 200cc question

Hi i have a Gilera runner 200cc with malossi variator and leo vince sbk exhaust and few other part but i had a scrap engine from a trade deal i done and i found it had a malossi 218cc bore kit the piston was cracked but i was woundering if it was worth putting on the bike. would i see the difference in top speed or just more torque from the engine.