A tsarin birki na mota, faifan birki sune mafi mahimmancin sassan tsaro. Faifan birki suna taka muhimmiyar rawa wajen ingancin duk birki. Saboda haka, faifan birki mai kyau shine mai kare mutane da motoci.
Kushin birki galibi suna ƙunshe da faranti na ƙarfe, yadudduka masu rufe zafi da tubalan gogayya. Dole ne a fenti faranti na ƙarfe don hana tsatsa. Ana amfani da na'urar bin diddigin zafin wutar ta SMT-4 don gano rarrabawar zafin jiki yayin aikin rufewa don tabbatar da inganci. Tsarin rufe zafi ya ƙunshi kayan da ba sa canja wurin zafi, kuma manufar ita ce don dumama rufi. Toshewar gogayya ta ƙunshi kayan gogayya da manne, kuma ana matse ta a kan faifan birki ko ganga na birki don haifar da gogayya yayin birki, don cimma manufar rage gudu da birki na abin hawa. Saboda gogayya, toshewar gogayya za ta lalace a hankali. Gabaɗaya, ƙarancin farashin faifan birki, da sauri zai lalace.
Kushin birki na kasar Sin, kushin birki na kasar waje, wani kuma kushin birki, manyan abubuwan da ke cikin kushin birki sune kushin birki na asbestos da kushin birki na rabin karfe. Matsayin kushin birki shine kariyar mutane da motoci.