When I see bearings like this on low a mileage bikes, I think pressure washers.
I’ve never taken out my pressure washer to wash my bikes and never will.
Also on the ST, I make sure I top up the front bearing seals with marine grade grease as this is the first line of defence for keeping dirt and water out of the bearings.
Choose a grease with excellent resistance to water contamination for the seals.
I‘ve never repacked wheel bearings on motorcycles before, need to research what grease is best for motorcycle wheel bearings.