Crankshaft nikintu cyingenzi kigize moteri, kandi imikorere yacyo ijyanye neza nubwiza nubuzima bwa moteri. Imiterere yubuziranenge bwa crankshaft igena neza imikorere yimikorere numutekano bya moteri ya mazutu. Niba igikonjo gikomeje gukoreshwa nyuma yo kunama no guhindagurika kwa torsion, bizihutisha kwambara uburyo bwo guhuza inkoni, ndetse bigatera no kuvunika no kumeneka. Mbere yuko moteri ikoranyirizwa hamwe, usanga kugabanuka kwa crankshaft kurenza igipimo cya tekiniki, bityo ibihuru bya coaxial ntibigomba guterana kubushake. Niba igikonjo gifite ubugororangingo bukabije cyashyizwemo ibihuru nyamukuru, igikonjo kizaba cyoroshye kandi kirekuye mugihe cyo gukora. Crankshaft izabyara umuvuduko winyongera ku gihuru cyera, kandi kubwibyo, igihuru cyera kizashira vuba, gishobora gutera impanuka yo gutwika igihuru. Iyi ngingo isesengura icyateye crankshaft kunama no kugoreka.

Impamvu zitera kunama no kugoreka:
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(2) Moteri iraremerewe, ikomeza "deflagration", kandi akazi ntigahagaze neza, kuburyo imbaraga za buri kinyamakuru zitaringaniye.
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. igikonjo cyambarwa cyane, imbaraga zidahagije no gukomera, cyangwa kunama no guhindagurika kubera guterana nabi.
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(9) Iyo imodoka itangiye kugenda, igikorwa cyo kurekura pedal clutch kirihuta cyane, kandi gusezerana ntabwo byoroshye. Cyangwa tangira moteri n'imbaraga zidasanzwe, utume igikonjo gihinduka gitunguranye.
(10) Koresha feri yihutirwa mugihe utwaye, cyangwa ukoreshe ibikoresho byinshi n'umuvuduko muke kugirango utabishaka gutwara imbaraga za moteri zidahagije.