'Excessive' sidestand play was a feature of my '08 F800GS, my first and second GSAs and my '06 R1200GS. 
I've successfully reduced it to almost nothing. I'm not sure whether the dealers will still carry the needed part, but believe it or not, you'll need a Vauxhall dealer for this fix...
The Astra F (circa 1995) needed a factory-developed kit to fix a gear lever rattle noise. Sometimes the kit fixed it, sometimes not... but one of the parts contained in the kit was a spring-steel wave washer just under 0.5mm thick.
I've found that two of them together are perfect for curing the sidestand play - just remove the sidestand, clean everything well with paraffin and dry, apply a liberal amount of lithium-based grease to all moving parts, slot the two washers between the sidestand pivot and sidestand frame pivot, then re-insert and fasten the sidestand pivot bolt.
Sorted.

I've successfully reduced it to almost nothing. I'm not sure whether the dealers will still carry the needed part, but believe it or not, you'll need a Vauxhall dealer for this fix...
The Astra F (circa 1995) needed a factory-developed kit to fix a gear lever rattle noise. Sometimes the kit fixed it, sometimes not... but one of the parts contained in the kit was a spring-steel wave washer just under 0.5mm thick.
I've found that two of them together are perfect for curing the sidestand play - just remove the sidestand, clean everything well with paraffin and dry, apply a liberal amount of lithium-based grease to all moving parts, slot the two washers between the sidestand pivot and sidestand frame pivot, then re-insert and fasten the sidestand pivot bolt.
Sorted.
