Interesting that they list the new AX as 17.5 ounces compared to the FX at 19.4. That's almost 2 ounces lighter for the new engine.

They do list the weights with muffler as 23 versus 23.6. Could be an error somewhere, or the AX muffler is 1.3oz heavier than the old one. If that's the case, and you have an old muffler, you got a way to juggle some weight up front.