Gen 5: 2016 -> 2016 ZX10r shifting issues - Page 2 - Kawasaki ZX-10R.net
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post #11 of 13 Old 08-03-2017, 06:39 AM
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Quote:
Originally Posted by SkyDork View Post
I disagree, of course. Preloading the shifter is NOT good habit. It's bad habit. You've obviously never torn into a sequential gear transmission to understand how they work.

The constant mess gear pairs slide along a bar and engage each other on the side. In order to do that, a shift fork moves them. The gears are always spinning, but the shift forks do not. Preloading the gear shift linkage causes the stationary shift fork to sit against the spinning gear pairs. If you don't think that will prematurely cause the shift forks to heat up, bend, and wear out, you're wrong. And doing that with a quickshifter in the loop can cause the switch to be tripped, interrupt the ignition, and all without the proper force on the shift linkage to begin with. In race conditions, with an engine teardown and rebuild every race or so or when crucial milliseconds are measured, it might gain you something. For all other people, preloading the shifter just causes you to post threads on here asking other people why your shit don't shift right.

I'm not going to pretend I know as much as you do because I know I don't. The only reason I initially thought that preloading the shifter is a good idea is because it makes clutchless upshifts smoother and improves their success rate (compared to botched shifts). Points taken though and thanks for the comprehensive breakdown.

If I intend on tracking a bike or racing it then I would certainly invest in an aftermarket shift star like the Factory Pro. I believe it makes for a cleaner mechanism and reduces the overall wear and tear.
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post #12 of 13 Old 08-03-2017, 09:48 AM
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No need to preload with a QS, you're risking engaging the sensor and or it not working when you go to shift. Just push/pull on the shifter and bang through the gears.

After two seasons on my bike the transmission/clutch were absolutely fine with no abnormal wear and no parts were replaced. I replaced the clutch in the third season just because.
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post #13 of 13 Old 09-11-2017, 06:22 AM
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Quote:
Originally Posted by SkyDork View Post
I disagree, of course. Preloading the shifter is NOT good habit. It's bad habit. You've obviously never torn into a sequential gear transmission to understand how they work.

The constant mess gear pairs slide along a bar and engage each other on the side. In order to do that, a shift fork moves them. The gears are always spinning, but the shift forks do not. Preloading the gear shift linkage causes the stationary shift fork to sit against the spinning gear pairs. If you don't think that will prematurely cause the shift forks to heat up, bend, and wear out, you're wrong. And doing that with a quickshifter in the loop can cause the switch to be tripped, interrupt the ignition, and all without the proper force on the shift linkage to begin with. In race conditions, with an engine teardown and rebuild every race or so or when crucial milliseconds are measured, it might gain you something. For all other people, preloading the shifter just causes you to post threads on here asking other people why your shit don't shift right.
+1. Also agree with not using the QS between 1 & 2. Too much of an rpm difference and too much torque to screw things up.
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