2 Stroke porting Chamfering the port part 3.mpg 

+duane5150 We are using a 182AMC www.ccspecialtytoolstore.com/right-angle-rotary-hand-tool-for-porting-p/182amc.htm . It's not really a die grinder, it's a porting tool powered by a flex shaft motor that lets you use full torque at any rpm, unlike pneumatic tools. The 182AMC has a smaller 90 degree head that allows you to work from the inside of the combustion chamber on 2 strokes all the way down to 30cc's of displacement. Great question and thanks for watching.