Bicycle tinganene kuti ndi "injini", ndipo kukonza ndikofunikira kuti injiniyi ikhale ndi mphamvu zake zazikulu.Izi ndi zoona kwambiri panjinga zamapiri.Njinga zamapiri sizili ngati njinga zapamsewu zomwe zimakwera m'misewu ya phula m'misewu ya m'mizinda.Ali m'misewu yosiyanasiyana, matope, miyala, mchenga, ngakhale nkhalango za Gobi!Choncho, kukonza ndi kukonza njinga zamapiri tsiku ndi tsiku ndizofunikira kwambiri.
1. Kuyeretsa
Njingayo ikathiridwa ndi matope ndi mchenga ndipo mapaipi aipitsidwa, zomwe zimakhudza kugwiritsa ntchito bwino, njingayo iyenera kutsukidwa.Tiyenera kukumbukira kuti pali mbali zambiri zonyamula njinga, ndipo zigawozi zimakhala zovuta kwambiri kumizidwa m'madzi, kotero poyeretsa, musagwiritse ntchito madzi othamanga kwambiri, ndipo samalani makamaka pamene pali mayendedwe.

Gawo 1Choyamba, muzimutsuka thupi ndi madzi, makamaka kuyeretsa pamwamba pa chimango.Tsukani mchenga ndi fumbi ophatikizidwa mu mipata ya chimango.

Gawo 2Tsukani mphanda: Tsukani chubu chakunja ndikutsuka dothi ndi fumbi pa chubu choyendera cha mphanda.

Gawo 3Tsukani crankset ndi derailleur kutsogolo, ndipo pukutani ndi thaulo.Mutha kuyeretsa crankset ndi burashi.

Gawo 4Yeretsani ma disc,tsitsani chimbale "choyeretsa" pa ma diski, kenaka pukutani mafuta ndi fumbi pama diski.

Gawo 5Konzani unyolo,sphwanya unyolo ndi burashi woviikidwa mu "zoyeretsa" kuchotsa mafuta ndi fumbi mu unyolo, zimitsani unyolo, ndikuchotsanso mafuta owonjezera.

Gawo 6Chotsani flywheel,pchotsani zonyansa (miyala) yomwe yakhala pakati pa zidutswa za flywheel, ndikutsuka flywheel ndi burashi kuti muwumitse flywheel ndi mafuta ochulukirapo.

Gawo 7Tsukani derailleur yakumbuyo ndi gudumu lowongolera,chotsani zonyansa zomwe zakhazikika pa gudumu lowongolera, ndi kupopera mankhwala oyeretsera kuti achotse mafutawo.

Gawo 8Chotsani chingwe chubu,ckutsamira mafuta pa chingwe kufala pa chingwe chubu mawonekedwe.

Gawo 9Tsukani mawilo (tayala ndi mkombero), uzani mankhwala oyeretsera kuti atsuke tayala ndi mkombero, ndikupukuta madontho amafuta ndi madzi pamphepete.

2. Kusamalira

Gawo 1Konzekeraninso utoto wophwanyidwa pa chimango.

Gawo 2Ikani zonona zonona ndi kupukuta sera pagalimoto kuti musunge mtundu woyambirira wa chimango.

(Zindikirani: kupoperani sera mofanana, ndi kupukuta mofanana.)

Gawo 3Mafuta "ngodya" ya lever ya brake kuti lever ikhale yosinthasintha.

Gawo 4Mafuta kutsogolo derailleur "ngodya" kusunga mafuta.

Gawo 5Thirani mafuta unyolo kuti maulalo a unyolo azikhala opaka mafuta.

Gawo 6Ikani mafuta kumbuyo kwa derailleur pulley kuti musunge kutentha kwa pulley.

Gawo 7Ikani mafuta pa mawonekedwe a chitoliro cha mzere, perekani mafutawo ndi chopukutira, kenaka finyani chotchinga cha brake, kotero kuti mzerewo ukhoza kukoka mafuta mu chitoliro cha mzere.