The most heard about complaint of any discover owners is the very bad performance of chain sprocket. Its a constant trouble for me, very unpleasant sound, and the longevity is very poor, i first replaced my chain sprocket set when my bike was only 11000 kms old.. now it has ran 22000+kms seems the chain is creating some problems again. Completely fed up, otherwise my bike has no other problems of now. My bike is discover dts-si 100 5G

need suggestions or a possible way out.