would chain and sprocket cause my vibration?????

Would a worn chain and sprocket cause the vibration issues that I've detailed here?

http://www.chinariders.net/modules.p...ewtopic&t=3470

The dealer apparently ordered a chain and sprocket and says there is nothing wrong internally with the engine. Which is good news, but I don't understand why the bike would be howl when it is cold and then as it warms up develop the vibration I described and this situation is attributable to a chain and sprocket problem. I obviously have ALOT to learn.