Chainsaw Repair

That's why I was looking for the thickness on the bb ring to see if I could find cabers.   Does stihl have a 58 m&m piston?  What's stihl rings thickness.

I know Mako has a 58mm kit for the 066 etc, but I am guessing the rings will be the same.
To be honest I would not bother with a BB kit and just run the standard 56mm cylinder, simple with replacements rings etc and they go ok and if you start doing them up they go really good.
I forgot to mention, the aftermarket kits ive seen do not have a barbed pulse tube like the Mahle ones, these are just a little piece of alloy pipe poked into a hole and I found unless you use the proper black pulse line it will come off when the saw gets hot and stop the saw dead. I have tried different types of tube including the yellow clear stuff but it come off.