1990 I was on XJ 650 bike and hit a combi at 100kmh in the door ... Broken humerus broken femur cracked scull .... broken rib also lucky to be alive ....
Ok I took it to a gearbox repair Center ...
Chatted to there "Expert"
They say its very soft noise and probably a bearing that not happy but they assure me its going to take a few years before it fails .
they say i can ignore it ...
Ive asked gearbox repair chaps they listened to the sound and say either gearbox bearing or gears damaged due to low oil level with the oil leek.
and yep clutch kits not needed
Ok pulled gearbox out
clutch plate looked ok thrust bearing a bit rough when spinning it , anyway replaced with full clutch kit and had flywheel skimmed.
After re assembly
Noise still at gearbox there when in neutral and idling and if i push clutch in it goes away .......
So perhaps gearbox...
I was suspect as I saw that cover plate was wet ... so I,d say all leaked out over time ... I have installed it back with New gasket and sealed it ...
I have a thrust bearing noise goes away if I push the clutch peddle in so this weekend I will pull the gearbox and inspect ... Probably replace...
Nope running cleen water so far still want to wash out and flush one more time .... service chaps said I must flush 2 times
I will definitely put in antifreeze after
Took it for a drive and had no problems .... at high speed temp drops to 1/4 gauge when I get home and let it idle 20 minutes builds up past half and the 2 fans come on and then it drops back to half Gauge ... I,d say all normal now
I flushed the radiator with pressure hose had loads of dirt...