30% ~ 50% is the duty/custom valve of bike which you will import (this valveu is calculated by appraisal officers assigned by govt on goods arival at port), daily importers ahve there good hello hi and get there good evaluted at as low as 35% but offricaer has full autority to evalute on as high as 50%, (som time speed money and UDT is used to keep the evaluation to lowest bracket)
For Royal Enfield, UK is best spot after UAE, as shipment from UAE is like dirt cheap and also UEA is duty free in UK you might have to pay inland duty there as well, just like FOB in china.
Srilanka k rules ka I have no idea.... you can talk to me on 0320-2594328 and I will explain you whole procedure,, one thing is must bike must not be older then 3 years or it will be confiscated which kicks out CD200 out of import list as its last production date was 2004 infield is still in manufacture so you can grab a new model..