small two-wheeler; moped-class vehicle
Used on street signs and in traffic regulations to refer to small two-wheeled vehicles such as mopeds or scooters with small engine displacement.
This road is closed to small two-wheelers.
The sign says 'small two-wheeler'.
自動二輪 refers to larger motorcycles, in contrast to the small two-wheelers covered by 小二輪.
Compound of 小 (small) + 二輪 (two wheels), literally 'small two-wheeler'. The reading こにりん follows standard on'yomi for the kanji.