Chuck, the last year that Mikey Bertrand raced, he went on a scale at a kart track with the mower. I do not recall what it was, but I know that Eric's mower alone was within 10 pounds or so. And I bet Mikey was a bit "bigger" then when you saw him last! I want to say somewhere in the 550 lb. range. Eric probably weights a bit less than I do, I would guess in the 160-170lb. range.