Basically they're going to go back to the old method of duties, going by MSRP (manufacturers suggested retail price). So let's assume the case of your bike a brand new 2012 R1.
MSRP is $14000
Duty would be 80% of $14000 = $11200
So just duty alone would come out to 10.5 lacs
Whereas in the old scheme it would have been $4250 = 4 lacs
So expect a price difference of 6 lacs or so on brand new bikes & around 2-4 lacs on older imports. 2012 were going for 18.50+ before, now they will go for 24+, so you have made a very good investment 
However this is still speculation as the S.R.O hasn't been issued yet, but dealers are already quoting new prices.