best bit about the 171 for me is that apprently stihl set up a chinese factory to bang them out to the old design. This means that I can use any of my three bars (12, 14, 18) with standard picco chains – as the sprockets are the same and the two bolt bars are interchangeable.
Out of the box however, the saw comes with a micro chain and narrow gauge bar (1.1mm) so Ive taken that off and put it in the spares box.
When I go down to the coppice I can take the 171 with a 14″ on it and I take the 230 in a bag without a bar on as a back up in case the 171 stops working for any reason. Fingers cross it wont, but wasting a day because the saw stops is a pain in the arse.