Yamaha YZ125, YZ250F, YZ450F – 2017 г.
Ngosuku oluhle, olunelanga nolushisa kakhulu, saba nethuba lokuhlola amamodeli we-Yamaha ka-2017 eDorne. Ithrekhi ibisesimweni esihle kakhulu, isicaba ngokuphelele, ngaphandle kwesilayidi esisodwa noma isiteshi. Imvula ngalobo busuku nayo yenza isiqiniseko sokuthi usemanzi te. Ngingayichaza njengomzila osheshayo futhi okhangayo. Isisekelo yinto ephakathi kwesihlabathi nomhlaba. Ithrekhi ihlotshiswe ngokugxuma okukhulu kwe-ski, e-Dorne ungandiza ngaphezu kwamamitha angama-30. Amakhona avuliwe, okuvumela umshayeli ukuthi agcine isivinini esiphezulu kuwo.
Esikhathini esivela ku-2008 kuya ku-2014, i-Yamaha yaba novivinyo olukhulu, isikhathi senkinga encane, kepha ngemuva konyaka we-2014 inkampani yazikhipha ngobuciko futhi yaqala ukunqoba izindawo eziphakeme ze-motocross. Onjiniyela baqala ukusebenzisa umzamo omkhulu nokunaka izithuthuthu, futhi imiphumela yabonakala ngokushesha okukhulu. Eminyakeni emibili edlule, i-Yamaha ibiqhosha ngesihloko se-AMA nangesihloko se-MXGP.
Kusukela ngonyaka odlule, injini engu-250cc ene-four-stroke kuphela I-See ishintshe kakhulu, futhi akukho okuningi okushintshile kumfowabo omkhulu, i-450cc-four-stroke. Bheka Okuwukuphela kwento entsha ama-brake discs enziwe ngezinye izinto ezikwazi ukumelana nokushisa. Ku-125cc-two-stroke, yizithombe kuphela ezintsha, futhi esimweni se-YZ250F, kunezici eziningi ezintsha. Injini inesilinda esisha, i-valve edonsayo isishintshile, inkulu futhi inespring esihlukile. Ibhayisikili futhi linekhompyutha entsha ye-ECU evumela injini ukuthi ithuthukise amandla engeziwe kuma-RPM aphezulu. I-transmission nayo ithuthukisiwe njengoba i-Yamaha idale umshini omusha ozishintshayo ovumela umgibeli ukuthi ashintshe ngokushesha futhi kalula. Ukuzinza kwenjini kuye kwathuthukiswa ngokuhambisa ifreyimu enkulu ngaphezu kwamaphedali. Izigaxa ezinamathisela injini ohlakeni aziseyona i-aluminium, kodwa ziyinsimbi. Ukuze uthole ukulawula okungcono kwebhayisikili, ama-pedals abekwe ngamamilimitha amahlanu ngaphansi futhi ama-dampers asethuthukisiwe nakakhulu. Njengenjini engu-450cc, lena inama-brake discs kwenye into ehlukile. Ngaphezu kwazo zonke izinto ezintsha zobuchwepheshe, isithuthuthu sathola ihluzo ezintsha, ama-fenders ashintshile kancane uma kuqhathaniswa nonyaka odlule, futhi isithuthuthu sihlotshiswe ngamarimu amnyama nezesekeli zegolide.
Sibe nethuba lokuhlola amamodeli we-YZ125, YZ250F, YZ450F nazo zonke izimpinda zabo ze-GYTR. Kusukela izinjini ze-125 no-450 cc. I-Cm ayikashintshi kusukela ngonyaka odlule, nginake kakhulu isithuthuthu esingu-250cc. Bheka Okokuqala, ngiqaphele amandla amakhulu ahanjiswa yinjini. Uma uqhathaniswa nabanye, awujwayelekile ngempela, ngakho-ke kufanele ube sesimweni esihle somzimba ukuze uthambise lesi silwane esiluhlaza okwesibhakabhaka. Injini ine-torque enkulu ukusuka ebangeni eliphansi kuya ebangeni lejubane elikhulu. Kuyathakazelisa ukuthi ezindizeni ezinde, lapho ugcina impintsha ivuleke ngokugcwele isikhathi eside, injini isazodonsa ijubane. Ibhayisikili libuye lilawuleke kakhulu kunangonyaka odlule, engikholelwa ngokwami ukuthi kubangelwa ama-pedals abekwe phansi futhi anikeze umgibeli amandla amaningi okulawula injini. U-gearbox usebenza kahle, ngabona masinyane ukuthi nakuma-revs aphezulu ungashintsha ngaphandle kwezinkinga, okuyinto enhle. Ngiwathande kakhulu amabhuleki ngaphandle kokulungiswa. Zinikeza amabhuleki asezingeni eliphakeme. Ama-absorber absorber abhekelwe uhlobo oluthile lomhlaba ophakathi futhi asebenze kahle kakhulu kuzuba. Ngangijwayele ukweqa kakhulu futhi ama-absorber ethusayo enze umsebenzi omuhle. Kwangijabulisa kakhulu ukuthi ithrekhi yayicwebezele ngokuphelele, ngakho-ke ngakwazi ukuyithokozela nangaphezulu, kepha ngenxa yalokhu, angikwazanga ukuhlola ama-absorber absorber kahle futhi ngakha umbono ngawo.
Kodwa-ke, into enhle kakhulu ukuthi ngangiwathanda amabhayisikili e-GYTR. Amandla amaningi nobuholi…. O, cishe lokho esihlokweni esilandelayo!
umbhalo: Yaka Zavrshan, isithombe: Yamaha
