Modificate RPM S speed on mazak mazatrol m2

Mazak VQC 20/40B Mazatrol M-2.These machines usaly do 4000 rpm on spindle and pals on the net says its very difficult to find a machine thats make more, (10000 rpm)becouse off a weak spindle-construction.I have checked the parameters,even the hidden GH4,GH3...and GL4 GL3..
I was also looking on top off spindle mechanism but did not find anything saying that machine is ready for hi gear.If somebody have information on aktual tema I would be pleased to get info from that person about parameters settings and every eventual mechanical changes needed
to set it in hight speed mode.

Thanks in advance
sve0019.