afternoon. new here,with gear shaft issues

[xdaddyxspudx]

hi


im jamie i brought a bumble bee 2002 fazer 3 4 months ago


not had a issue with her at all apart from the past 1 months.


ive been getting a whinning noise coming from the engine. it happens when bike is rev'd but only in gear at around 3/6k revs.


if i pull the clutch in the noise dissapear's.


so ive been tinkering around i removed the clutch cover near front sprocket and the gear shaft moves and has around 2/3mm play.


so im thinking that the gear shaft bearing gone or a bearing inside the gear box has gone.


im wondering if any one has had any other issues with this time of problem and is there a fix for it.


my only way i can see it being fixed it to split the crank case and replacing the bearing.


which is a big job in its self.


thanks jamie