T.K.R.J. is a Japanese manufacturer of high-quality motorbike parts, UEDA MOTORCYCLE PARTS CO.,LTD. The company has more than 40 years of experience and produces pistons, rings, piston pins, valves, needle bearings and connecting rods. T.K.R.J. is a supplier of parts for the so-called first assembly for the majority of renowned makes of single-track vehicles. Their customers are: Honda, Kawasaki and Yamaha.