Man Law: Thou must use the search feature when appropriate so thou does not get flamed.
To better understand the coarse, belt-sander nature of asphalt at speed, simply apply an unprotected hand to the freeway’s surface the next time you’re the passenger in a car. If you’re unwilling to do this, how do you justify riding a motorcycle without protection?
it is a bitch sort of. if you're not confident i would have them do it. problem is whenever I've had a shop pull my tank and plastics they always seemed to fuck something up. one shop pinched a wire against one of my fans and it wouldn't turn. they ALWAYS put the 08+ plastics on wrong in the front. we all know what area i'm talking about if you've done it before.
I would do it yourself and take your time. The vast majority of these guys on this forum are very helpful and take the time to respond if they can help. it's pretty damn cool actually. wished i lived closer to some of these guys. and you can download the service manual here also.
after all....you gotta learn this stuff eventually
Id say keep that 125 and do it urself if you are mechanically inclined. If not, then pay the shop and see if you can watch them do it. As far as asking for the old plugs bag, i feel thats not worth much as they can give you any old plugs back. I know too many crooked folks in these shops now a days.