I bet they would be allot heavier that a video arcade game which is basic a empty cabinet with some circuit boards, the bulk of the weight is the monitor, the EM games are loaded with relays and allot of mechanics to make it all work.
I worked a few EM pins, spend allot of time, cleaning contacts on the relays and switches....
I got some great (commercial grade) contact cleaning strips...if you want some Creighton for your Speedway I'll send you batch.
Let me know !