Any ideas on lightening Epoch DNP 10 speed freewheel?

[yumseyo]

Hi all,

I am building a folding ebike with a bionx motor that only takes a freewheel. So I opted for a 10 speed DNP 11-32 freewheel that weighs a lot. I put together a 6770 di2 flat bar shifting system and wanted to take advantage of its 10 speed capabilities. It will be a 20 speed. I am running a road link adapter to run the 32 tooth gears.

Any thoughts?