Due to non-availability of parts for Khyber, people are opting Cultus Carburettor for Khyber as it is easily available at 3S too and you are doing opposite to it?
@tahasiddique766
Anyways, when i had 2000 Cultus, it used to give 12 but when i installed after market CNG, then on cng, average was Good on CNG but on petrol, it was reduced to 9.5 to 10