noun
750cc motorcycle
Slang term used among motorcycle enthusiasts; derived from 七 (なな, seven) + 半 (はん, half), referring to 750cc displacement.
彼はナナハンに乗ってツーリングに行った。
He went touring on his 750cc bike.
ナナハンは昔のバイク乗りの憧れだった。
The 750cc motorcycle was the dream of old-school riders.
General term for large-displacement motorcycles; ナナハン specifically refers to 750cc models and carries a slangy, nostalgic feel.
From 七 (なな, seven) + 半 (はん, half), referring to 750cc. The exact origin is uncertain, but it likely arose in Japanese motorcycle culture.