I'm sharing my experience..
tool that I bought for this job..
stripped head... (actually this is my moped..)
you need to drill it first.. but I forgot to take a picture.. well I couldn't..
anyway I pulled that out.
tiny bolt with broken head... it was really tiny one...
made a hole with drill... I couldn't take a picture cuz both of my hands was busy drilling..
rotating counter-clock wise..
it came out...
personally, I really hate this job.. it's really PITA..
So I learnt a lesson that I always should be really careful with bolts..
hope this will be resourceful to somebody..