The stock stem is 1 1/4 and has about a .086 wall thickness.
3 Wh33l3r Rid3r used 1 1/4 with .058 wall thickness. Look> http://www.blasterforum.com/threads/extended-steering-stem-diy.34858/
.058 wall thickness is less than 1/16", i think that may be a little thin.
I think i may go with .065 wall thickness, its a little thicker then 1/16".
What wall thickness do you guys use?
i don't know, i remember it being thin, but it is chro-mo, and thats it's purpose...1/2 as thick but twice as strong as similar mild steel