Just finished a complete tear down build on this 2171, replace everything I could. Highway 52mm big bore kit with pop up piston, I turned the cylinder down on the lathe, port and polished cylinder, heat treated piston, base gasket delete, new carb, new seals, new bearings, new air filter system threw Red Beard Saws with a uni foam filter, unlimited coil, new fuel lines, new filters, triple ported exhaust plugged the decompression release off, diff dogs, full wrap handle 36 inch bar with a Archer skip tooth chain, new oil pump, new brake components, new clutch, new sprocket, new drum I’m prolly forgetting a lot of other stuff so this is the finished product. I put it threw red oak and white oak today and cut great!! I think I might get a tach for it.
