IECHO yatsopano BK4 kudula dongosolo ndi wosanjikiza wosanjikiza (ochepa zigawo) kudula, akhoza kugwira ntchito pa ndondomeko basi ndi molondola, monga mwa kudula, mphero, V poyambira, chodetsa, etc. Ikhoza kugwiritsidwa ntchito kwambiri m'mafakitale a magalimoto mkati, malonda, mipando ndi gulu, etc. BK4 kudula dongosolo, ndi mwatsatanetsatane mkulu ndi dzuwa, amapereka makina kudula njira zosiyanasiyana mafakitale.