I got my motorcycle stolen and only had liability insurance.

I am still making finance pmts, but just came into a lump some of money. Would it be possible to offer the finance company a settlement since the load is basically unsecured? I owe 8k and would be willing to pay 4k. I would threaten to stop paying (I wouldn't actually stop) since the debt is unsecured and they have nothing to repo. Any better ideas?