many things... if some one say you to purchase 1988 CG125 Brand new or purchase 2013 latest model , you will preferably select the latest one.. In Pakistan most of the Bike companies are still using the same engine which they introduced in 1988 (CD70, CG125).. There is no change after 25 years in the engines of bikes. Only what they changed is cosmetic changes. Can you imagine that there was no new inventions in this field for last 25 years. Now bikes are coming with ABS brakes, digital meters. But our all major companies always hesitate to give you the latest and best specification.
All the major companies are charging for new technology and providing the same 25 years old things. You see around your self and found many examples.
Its their monopoly..