Well this is the way I do it and if your over 35kg dont do it the same way I do lol. Theres many other ways and search this topic and you will find a pretty good thread which has all the ways to do it.
The way I did it is very sketchey and....Just dumb but I wanted to be cost effective and see if it was worth my time to go out and buy the right pegs and all the bits and peices I need for good pegs. Heres what I did:
1.Take a normal axel and a head clamp screw.
2. Put the normal axel through the peg then through the hole where you nomally put the axel for the wheel
3. Screw the other headclamp screw in as much as you can
4. Now this was annoying as hell to tighten it but anyway; I shoved an Allen key/Hexagon key down there into the Axel and then using a pair of sissors I somehow turned it and got it nice and tight.
Note: This will NOT work on A pro model, it will only work on Blade scooters, Madd scooters (I did this on a Madd) and Old A Scooters. However It will fit on ALL scooters forks so you can use that metod for the fork for any scooter just only a few for the back peg.
Also it will be ALOT more difficult if you want 2 pegs on the frount/back, its still possible but will probably require more than 1 person unless you want to spend hours.