yamaha ysr50 with derbi gpr50 motor in it 5 Likes Follow Build View Build Builder: bobby costello Updated 2012-09-21 21:29:18 Moped: 1991 Yamaha YSR-50 15075 Builds echo $product_type; ?>: Derbi GPR50 15075 Builds echo $product_type; ?>: charmo 80cc 15075 Builds echo $product_type; ?>: arrow echo $product_type; ?>: echo $product_type; ?>: 15075 Builds Buy echo $product_type; ?>: Mikuni 26mm VM Main Jet: 210