I want to change the top mounts of the engine with polyuretane ones like the dog bone.But I didn't found anything.

Is there a way of upgrade to more solid ones?

There are a few alternatives. I have some INA Ones ready to fit. VF engineering do some which are pretty solid and look cool.

Also look for Black Forest Industries, they do a few different types.

Vibratechniks.....

These are a completely different design to the OEM ones. The weight sits on the bush, rather than being suspended by it.

Expensive, but well worth it. I've had them on mine (engine & gearbox mount) for 18 months and you feel them on tickover a little,but once on the move it feels beautiful and tight (ooooh er!!)

Steve

THS stuff is ok