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2011 Kawasaki Ninja ZX-10R Goes on Technical Hold – Engine Problems Suspected

Aprillia had a recall on it's RSV4 when it first came out because of pushrods. They corrected it and life was good.
Still I can never can figure out why a bike for consumers needs to compete for a pound here and a horse there to be top dog when most consumers don't and can't ride them anywhere near their potential. Still I can't blame people for wanting the experience of that combination of HP and technology. All the dyno numbers and weight scales never predicted how well the crossplane crank R1 would get around a track because it was heavier with less peak horse power than the competitors in it's class but when they learned how to use that motor the dynos and scales didn't account for how it got around the track faster than anything in it's class. It wasn't the rider it was the combination of the technology, how and where the motor produced it's ponies.
I bet the new ZX10R will be a great bike when all is sorted out.
I love my Zookie but miss my R1!
 
Here's some more news on this released from Kawasaki:

Kawasaki Releases More Information on the ZX-10R’s Technical Hold – Sales to Resume Late January

According to Kawasaki engineers, the sales hold resulted from a finding that indicated possible surging of the intake valve spring when the ZX-10R is operated under unique riding conditions (read: when riding on a racetrack, or other “spirited” riding conditions). Apparently the surge could cause the intake valve to seat improperly, resulting in poor engine performance, which could mean it affected the engine power output, engine reliability, or both.
As a remedy Kawasaki replaced the camshaft, valve springs, and spring retainers on the 2011 Kawasaki Ninja ZX-10R’s valves, which should prevent the surging, and maintain the ZX-10R’s engine performance. Additionally, Kawasaki USA has announced that sales of the Ninja ZX-10R are expected to resume in late January 2011.
 
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