CNG and Vario simply do not mix. many people have removed due to this, and i have personally seen people at honda drive inn karachi complaining about transmission issues etc. Main cause was CNG use. I have personally witnessed a case, where a VARIO owner was left with the choice of either removing CNG kit(otherwise face consequences of destruction of transmission) or secondly sell the car and get a M/T.. Any ways, you can try ur luck if you want to.