[問題] 騎到一半聲音變大
今天我同學騎著我的RS-100(九年的車)載著我,從頭份到新竹來回,
回程時,騎到一半聲音變很大聲(像改裝),里程約四萬多,平均每一千
換一次機油,也會定期換齒輪油,排氣管為副廠,在騎去和騎回來的路上
聲音還沒變大聲前,有聽到小小聲的放屁聲,是放油門時會出現
請問這可能是什麼問題呢?
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