Yamaha RXG Query

Hi, I hav recently purchase a 96 model Yamaha RXG, Yesterday got the bore sleeved & a SAM make pistion fitted. My query is why was the RXG a floop as heard by many, What was the problem, How can it be rectified? The price Rs 5000 was the reason for purchase. Need the Og tank & pannel (panel) sticker set for blk (black) tank , where can I purchase the same. I stay in bhiwandi

Thanking in advance

Nehal Nachan