View attachment 984363I have two 371's. I have one with what I call a mild port job, tighter squish, 7 tooth sprocket, and a 20" bar. The other has a bottem end port with about 12 degrees more blow down, Dominator piston, tighter squish, 8 tooth sprocket, 28" bar, and skip chain.
A mild port and tighter squish is good for about a horsepower, putting it equal with a 288 or a 390 a close to a 395 without extra 4lbs in powerhead, oil and fuel weight to carry around. I love how both.of them run.
View attachment 984364