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Old 11-09-2011, 11:16 AM   #1
ShadowHHR1
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quick shifter up shifting and down shifting?

I would like to get your opinions on if it would be beneficial to have a quick shift for both down shift and up shift on say a track bike? I have done plenty of road racing on a car and know it would be for car but don't know if the lack of traction while braking into a curve would benefit having a down shift. The setup that I am conjuring in my mind would be one that would give you to flexibility to set both rpms separate from one another. For instance you can set the up shift for 6000k+ and the down shift for even a mire 4000k or lower if you wanted too...

Thanks for all input in advance....
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Old 11-09-2011, 11:22 AM   #2
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The set up you describe is not a quick shifter
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Old 11-09-2011, 11:25 AM   #3
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Thats a matching shift system
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Old 11-09-2011, 11:31 AM   #4
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I was under that impression it would be called the same if your not using the clutch to do up or down shifting...
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Old 11-09-2011, 11:32 AM   #5
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Unless you have a really good slipper clutch, you DON'T want to downshift without matching RPMS

You can down shift without the clutch by matching rpms anyhow.

And a quickshifter isn't just about not using the clutch, it's about shifting in microseconds i.e. quick.

Not a real advantage for downshifts.
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Old 11-09-2011, 11:43 AM   #6
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Quote:
Originally Posted by texlurch View Post
Unless you have a really good slipper clutch, you DON'T want to downshift without matching RPMS

You can down shift without the clutch by matching rpms anyhow.

And a quickshifter isn't just about not using the clutch, it's about shifting in microseconds i.e. quick.

Not a real advantage for downshifts.
Got you that exactly the feedback I needed....thanks
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Old 11-09-2011, 11:51 AM   #7
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They have systems for downshifting in race bikes that automatically blip the throttle. Not cost effective for road bikes however.
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Old 11-09-2011, 05:52 PM   #8
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Old 11-09-2011, 06:50 PM   #9
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Clutchless downshifts are a bad idea. Unless you get it right EVERY time there will likely be damage to the gears that will get worse over time.
Eventually it will lead to a trans rebuild, very expensive risk for the pleasure of not using the clutch.

Clutchless upshifts are a different animal and the RPM match is not as critical, especially in the upper gears. I usually use the clutch for upshifts for 1st to 2nd and 2nd to 3rd then no clutch for 4th thru 6th.
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