I went to a bike parts shop in chang moi, chiang mai, and asked for a klx250 rear sprocket. I'd been there before and know they sell them. The guy spoke some english, and said they had none. I asked for some engine oil. He said they had none. I asked for chain lube, he had some. So I went to pay, and saw the engine oil, so I got 2litres. and I asked another guy about the sprocket. He said they had kx ones, which will fit.so I waited a bit, then the first guy says they dont have any. So, do they have a no-sell-farang policy there, or isit just me? Should I return and persist until they sell me a sprocket, or boycott them and get a more expensive one elsewhere? I don't speak thai, but feel I should stand up for the rights of people,to be able to use a shop/restaurant etc without discrimination. I understand that technically, in england,the shop is not obliged to sell to customers. What s the legal situation in Thailand?