There are bikes parked outside of the many pawn shops in Buriram.
Have a ride/walk around and you will see them.
The best one is probably the one at the T junction with Buriram Pittayakhom school on your left.
Head along the main road that goes through the middle of Buriram, past the Isuzu showroom. Turn left at the next set of traffic lights.You need to travel up that road, with the Shell petrol station on your right. When you get to the end of the road the pawn shop is directly opposite. You will see the bike in front of the shop.