Gen 4: 2011-2015 Injector Size? - Kawasaki ZX-10R.net
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post #1 of 21 Old 07-15-2012, 07:14 PM Thread Starter
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Injector Size?

Does anyone know what the injector size is on the the 2011+? Primary and secondary.

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post #2 of 21 Old 07-17-2012, 06:16 PM Thread Starter
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post #3 of 21 Old 07-17-2012, 08:21 PM
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Both are 320cc's

If you look they are the same part numbers upper and lower.
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post #4 of 21 Old 07-17-2012, 08:21 PM
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Both are 320cc's

If you look they are the same part numbers upper and lower.
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post #5 of 21 Old 07-17-2012, 08:42 PM
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Thanks Garth. :) Off-hand, do you know why they stepped down the primary size from the 3rd gen (they're 440-ish, right)? Did they go larger on the secondaries compared to the 3rd gen?

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post #6 of 21 Old 07-17-2012, 08:50 PM
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I believe they are 440's

Not sure on why they down sized but even at 320-330 cc's times 8 you wont run out of fuel!
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post #7 of 21 Old 07-18-2012, 06:31 AM Thread Starter
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Cool, thanks. Now, will 3rd gen injectors swap into a 4th gen?

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post #8 of 21 Old 07-18-2012, 06:58 AM
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I'm not certain about the uppers but I believe the lowers are the same size.
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post #9 of 21 Old 07-18-2012, 07:03 AM
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If I had to guess, the reason they stepped down, is smaller injectors have better fuel pattern at lower rpms, and like Garth said, 8 320cc injectors is enough to drown that motor in fuel
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post #10 of 21 Old 07-18-2012, 07:21 AM
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Yeah for sure....

I ran my bike with E85 and I have a tune in my L mode that has about 35% fuel added to the uppers and lowers.... I still had to add another 18% fuel to the lowers with my PCV and my injector duty cycle hit 91% !!!!!

Hopefully with adding more fuel to the uppers I can keep that rich fuel mixture with out maxxing out my uppers and lowers.... but I haven't messed with E85 in a while
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