The J&S Jack/Trike lift is very stable. I can move the trike all around the garage while on the jack lifted with no issues.
The Jack does have to be positioned in a specific spot to function. The cable actuated lift arm has to be just behind the exaust cross over and just shy of the drive belt on the leading end. Also the Jack handle clamp needs to be mounted to the right side of the hydronic Jack. This gives a much better fender clearance (see pic 3)
I am very pleased and consider the Jack/lift money well spent.
Ride Safe,
Bill G