My particular motorcycle has a black vinyl seat cover covering a foam cushion. Last year the seat cover started to crack from sun damage so I patched it using vinyl from an old 4 wheeler seat we had laying around. After about a year this patch started to come apart and made my bike look sort of trashy since you could see the yellow foam sticking out. Luckily I had just got an old leather welding jacket for free.
So I set about cleaning and re-conditioning the leather. Then cut it apart and sewed it back into one piece.
I pulled and stapled it into place.
It looks like a leather horse saddle. I think it looks awesome! Not many other motorcyclists have a seat like mine!
Update: Leather lasted 2 years outside in the sun & snow. Made conditioner from beeswax and olive oil that helped extend the life and make it water repellant.
Back to new again.