TT Assen - 1999

#49 Naoki Matsudo (JAP) - Yamaha YZR250 / #4 Tohru Ukawa (JAP) - Honda NSR250

Naoki Matsudo:
GP Podiums: 2 - 2 x 250cc

Tohru Ukawa:
GP Victories: 5 - 4 x 250cc / 1 x 500cc
GP Podiums: 39 - 29 x 250cc / 10 x 500cc