Kawasaki RECOLHE ZX-10R 2011
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Gaucho
Re: Kawasaki RECOLHE ZX-10R 2011
isso mesmo, TODOS TEM Q RESPEITAR AS VMPsmamm2 escreveu:Acho que é bem por aí. A ZX, com um curso maior que a S, faz com que os pistões "corram" mais na mesma rotação e, consequentemente, que os esforços sobre os mesmos sejam maiores. Junte isto ao fato de que o corte da ZX é 500 RPM acima da S* e está feita a merda. Desenvolvendo o assunto:Gaucho escreveu:a Kawa manteve os 55mm............deu merda
Calculando a velocidade média dos pistões da S no corte:
VMP = 2 x (49 / 1000) x 14.000 / 60 = 22,87 m/s
Calculando a VMP para a ZX no corte:
VMP = 2 x (55 / 1000) x 14.500 / 60 = 26,58 m/s = 16,22% a mais que a S
Pelo jeito, a ZX precisava de um projeto/contrução melhor pra aguentar os esforços (materiais mais nobres, lubrificação melhor, etc). Os japas da Kawa, na pressa de largar a primeira BMW-beater, não testaram as coisas direito. Tô curioso pra saber qual vai ser a solução dos engenheiros...
*Menos nos USA, onde baixaram o corte pra 13.750 RPM pra passar na EPA.
a própria Fórmula 1 usa virabrequim menor q 40mm p girar + de 18K RPMs
Re: Kawasaki RECOLHE ZX-10R 2011
Diz a Kawa que descobriu o problema: flutuação das válvulas de admissão. Solução: trocar o comando e as molas/retentores das válvulas de admissão.
According to an official Kawasaki press release: "It had been discovered that when some examples of the new 2011 Ninja ZX-10R were operated at high rpm under unique riding conditions - such as operating on a racetrack - the intake valve springs could surge. Should this rare incidence occur it could cause one or more intake valves to seat improperly, resulting in poor engine performance.
Having examined the very small number of machines which exhibited this surge phenomenon, the Kawasaki factory engineers have designed and fully tested a countermeasure which solves the problem without affecting any facet of the new engine’s outstanding performance.
On the limited number of machines produced so far, the camshaft, valve springs and spring retainers for intake valves are being replaced to prevent the valve spring from surging. The same design update is automatically being incorporated into the ongoing production run."
http://www.motorcyclenews.com/MCN/News/ ... em-solved/
According to an official Kawasaki press release: "It had been discovered that when some examples of the new 2011 Ninja ZX-10R were operated at high rpm under unique riding conditions - such as operating on a racetrack - the intake valve springs could surge. Should this rare incidence occur it could cause one or more intake valves to seat improperly, resulting in poor engine performance.
Having examined the very small number of machines which exhibited this surge phenomenon, the Kawasaki factory engineers have designed and fully tested a countermeasure which solves the problem without affecting any facet of the new engine’s outstanding performance.
On the limited number of machines produced so far, the camshaft, valve springs and spring retainers for intake valves are being replaced to prevent the valve spring from surging. The same design update is automatically being incorporated into the ongoing production run."
http://www.motorcyclenews.com/MCN/News/ ... em-solved/
Enjoy yourself, it's later than you think.
-> seis cilindros boxer gerando 350hp, tracionando cinco rodas e bebendo pra caramba.
-> seis cilindros boxer gerando 350hp, tracionando cinco rodas e bebendo pra caramba.Re: Kawasaki RECOLHE ZX-10R 2011
500 
Enjoy yourself, it's later than you think.
-> seis cilindros boxer gerando 350hp, tracionando cinco rodas e bebendo pra caramba.
-> seis cilindros boxer gerando 350hp, tracionando cinco rodas e bebendo pra caramba.
Re: Kawasaki RECOLHE ZX-10R 2011
Se for isso mesmo, a atitude da Kawa foi exemplar. Retirou de venda e recomprou as motos vendidas até solução do problema.
"O socialismo dura até acabar o dinheiro dos outros"
M. Thatcher
M. Thatcher