Vehicle category: motorcycles.system: tires; sure fire tour grip, size mt90-16t.consequences of defect: tread chunking could lead to rapid loss of air from thetire, loss of vehicle control and an accident.note: owner may be alerted to tread chunking by a vibration during vehicleoperation.dot ID numbers: uu63sb3b240 through 340 and uu63sb3b031 through 201.