There is plenty registered RHD in Kyrgyzstan (from Japan). The same in Kyrg and Kazakh. There are different procedures on every border crossing. If you will enter from Uzbekistan you will get Temporary Import document which allow you to keep the car in country untill your visa will expire. If you will come from Afghan or Kyrgyzstan you will get nothing. As far as I remember you will have to pay 50 USD tax for importing the car, and about 40 for motorbike (on the border, custom officer should give you a bill. Keep it and don't pay anything else). There is still no insurance for cars in Tajik and Kyrg.
Registration your visa in OVIR is not necessarry from 2009.