Maybe this will help.
It's not size/strength, it's technique!
1) place bike on side stand
2) rock bike up until both feet of center stand touch
3) put right hand on passenger hand hold
4) put left hand on handle bar
5) put right foot on center stand
6) stand, putting ALL weight on right foot
7) while standing and at same time, pull up with right hand
8) left hand only serves to steady/balance the bike.
'16 BMW R1200GSA
'15 BMW R1200GSA - totaled
'13 BMW K1600GT
'08 Suzuki DR650