They provide support for old models for long time. You see even till today Ahl provide spares like old models filters , seat, cables & other accessories of cd70 & cg125. Regarding new parts they do training country wide to mechanics & provide new spares.
And they don't change shape of CD70 for customers convenience also its kinda they are doing ease for other parts vendors too who make after market accessories.
And Actually they are already offering two shapes of CD70. Dream version is complete changed version lookwise. But every year people complain CD70 mein mew changing kiyon nahein aa rahe.