Hey everyone, i just registered on the forum so hello to you all!
I have a 2004 Yamaha FZ6-N, running fine appart from an irritating noise seemingly coming from the front sprocket area! its like a whirring noise that only seems to come when im on the throttle, soon as i come off the throttle it stops. also i can feel more vibrations through the bars and footrests than usual and my fuel consumption seems to have gone up so theres some wasted energy somewhere!
At first i thought it was the chain worn out, so i replaced the chain and sprockets and still it persists!
i have been through all the obvious things, chain tension, wheel allignment, gunk in the sprocket cover. everything is how it should be!
i have heard of a few other people having this problem but no-one seems to have an answer! i thought maybe it is the output shaft bearing but there doesnt seem to be any play in that, although i havn't ruled that out yet.
does anyone have any clue what the hell im on about?