Okay, so what is the best way to press the bearing after i have put the balls in it?nope, there is a stop ring in the hub to prevent it from being pressed too far, but I'd guess yours wasn't pressed far enough by factory
Only thing to look out for is fine, steel wires sticking out of clutch pads that can get into bearing and lock it up (trim with scissors every so often if you see them, or replace the pads).
I think i got it fixed now. Used some grease. But the engine won't start. Maybe too mutch fuel, with too mutch oil (1:16). Will try again tomorrow.be aware that there are a couple diff thicknesses of woodruff keys for these - new one may not be same size as old one and slot in shaft
this is not a problem, though, as it will fit the shaft OK, but may just need a touch of filing to get the key to fit nicely