bearbear1991 發表於 2011-10-25 21:29 登錄/註冊後可看大圖 no need to buy 大減齒 but need to buy 摩打齒
bearbear1991 發表於 2011-10-25 21:40 登錄/註冊後可看大圖 19T maybe too samll, 20T 48pitch 摩打齒 is ok,as i am also using it for my 8.5t motor