[Fredster]

Can feel the OP’s pain.
Recently I sold a ‘14 Yamaha factory 4 seat cart because the ride was so harsh. It had a stiffer suspension and the seats were pretty standard.
I found that I was avoiding using the cart because of the ride quality.
I replaced it with a ‘15 Yamaha 2 seat cart which had upgraded seats. The softer seat cushioning made the ride
much comfortable (especially going over curbs).
An unexpected bonus, was that it also quieted
engine noise.
As far as I know the suspension is standard and I’m running 26 psi tire pressure.
A friend of mine was not happy with his ride quality, and checked out my cart seats…now he’s having his standard seats reupholstered.
So, another option is to improve/upgrade the seats!