Hi there.\n\nI was involved recently in changing sprocket and chain of my Honda\nhornet 600. The chain i had on was the original from Honda and lasted a\nhonerable 10966 miles. As I'm new to maintenance jobs and repair jobs i\nhave a question for the expert audience of this group.\n\nI removed chain and sprockets from the motorbike and installed the new\nones. Once I've aligned the rear wheel i checked for tight spots and\ncheck the tension in different parts of the wheel. Once i was satisfied\nwith the result i wanted to see if everything looked fine. With the\nbike on the rear wheel stand i started the engine and putted it in 1st\ngear. I sat down behind the rear wheel looking the rear sprocket. The\nrear sprocket had no lateral oscillations and i was perfectly aligned.\nLooking at the chain getting feed to the drive sprocket i noticed the\nchain oscillating slightly from left to right as the chain engaged in\nthe drive sprocket (this is only 3-4 millimetres but still very\nevident). When i inspected the old drive sprocket, which was installed\non the output shaft, i noticed that it was not rotating perfectly, but\nit had some anomalies, with slight oscillations.... I associated this\nwith the fact that the sprocket were worn.\n\nNow i installed a new drive sprocket and there is still oscillations.\nIs this normal or the bike could have a bent output shaft? There is no\noil leak on the output shaft, but will it quickly wear the chain? Could\ntell me if the drive sprocket should be aligned straight without\noscillations or is it normal to have some oscillations.\n\nYour help is very appreciated.