To begin with, is it good to buy an illegal thing?
Suppose you buy an illegal bike for Rs. 140k , and after 6 months someone steals your bike and sells it illegaly to someone else and then,..,,,,,,,,,,,,,
You know it starts a chain reaction.
Plus, you also deceive your own country by buying an illegal bike, which hadnot paid any taxes/duties on it.
I say buy a CD 70 and be proud of it. An illegal bike may give you pleasure for sometime but never satisfaction.