noun
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.
この道路は小二輪通行禁止です。
This road is closed to small two-wheelers.
標識に「小二輪」と書いてある。
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.