Julian43. I had a mess trying to get the correct brake light switch for my DT300i, until I called Kymco Parts Moster. The phone number is 888-987-6361. They know the difference between the left and right switch. They are NOT interchangeable I got a KYMCO OEM switch, Part # 35350-KNBN-901. The package says that part number and Kymco- SW RR STOP and the cost was $14.02 + shipping. You should call them and talk to Brian. He knows his stuff. Hope this helps.