From the comments:
"Naname nanaju nanado no narabi de nakunaku inanaku nanahan nanadai nannaku narebete naganagame.
(斜メ漆拾漆度ノ竝ビデ泣ク泣クイナ、クナナハン漆臺難ナク竝べテ長眺メ。)
translation:
"I have been watching these seven Nanahan motorcycles which is noisy like horse are plased beautifully on the lean of 77°"
It means nothing special
Araragi just wants Hanekawa to say "Nya"(゚∀゚ )やっほーい"