Question about shifting... without using your clutch
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  1. #1

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    935

    Question about shifting... without using your clutch

    Ok, I was just on the "Off Topic" forum, and one of the threads there gave me pause. LayinLo put up a link for a Yoshi product that claims you don't need to engage the clutch to shift... Umm... My bike already does that

    Is that good.. bad.. or not a concern?

    Don't get me wrong, I always clutch when shifting, but I also know that I can upshift without squeezing my clutch (never tried this while downshifting yet). I can just pop it up to the next gear without effort. The guy I bought my bike from, mentioned that to me, and although I tried it a few times, I still refrain from doing it while riding; more like I tried it out just because he said it does that. I've never actually tried that on any other bikes, so I don't know if it's the same all the way around, and I've never asked before... So now I'm asking.

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  3. #2

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    I've upshifted and downshifted without using the clutch, but only by accident. It happened while I was moving my foot over or under the shifter and accidentally bumped it too hard. It didn't do anything other than lurch slightly and scare me a little. Doing that every now and then won't cause much harm, but I would think that doing it repeatedly would cause damage to your transmission, sprockets, chain, and possibly the engine. Then again...I'm a computer guy, not a mechanic.

  4. #3
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    Racers do it to cut a few hundredths. Some do it all the time just to be cool. Actually, you can shift almost any modern manual transmission (bike or car) if you just match the revs. When upshifting, let the engine slow with slight pressure on the shifter. It'll pop in when speeds match. When downshifting, blip the throttle and do the same.

    The clutch is there for a reason. If you don't use it, you will cause accelerated wear on the tranny.



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  6. #4
    Rock it!

    My Bike(s)
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    Bike might have an electric shifter installed.

    - Nut

  7. #5

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    935
    Thanks ALL for the input and information. It makes sense that not using the clutch would wear down the transmission, as I would assume it would be, because it's the same with cars (all I've ever owned were manual transmissions). Which is why I continued using the clutch even after I knew I didn't "need" to.

    Nut - I'll look into the electrical shifter. Haven't seen/heard of anyone having one, but I have to go to a bike shop this weekend, and I can ask someone to have a look-see..

    Thanks, guys!

  8. #6

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    23
    Quote Originally Posted by RowdyRed94
    Racers do it to cut a few hundredths. Some do it all the time just to be cool. Actually, you can shift almost any modern manual transmission (bike or car) if you just match the revs. When upshifting, let the engine slow with slight pressure on the shifter. It'll pop in when speeds match. When downshifting, blip the throttle and do the same.

    The clutch is there for a reason. If you don't use it, you will cause accelerated wear on the tranny.
    Never heard truer words spoken.

  9. #7

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    1,286
    This product is an electronic shifter that only lets you shift UP without the clutch; not down. Its considered a race product and it cuts the ignition for a milisecond when you press on the shift lever. I'm not sure how effective this is and I'm not thouroughly educated on the matter either.

  10. #8

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    I never heard of an electric shifter. I don know they have air shifters for drag racing bikes.

  11. #9

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    864
    Quote Originally Posted by jaydog19833
    This product is an electronic shifter that only lets you shift UP without the clutch; not down. Its considered a race product and it cuts the ignition for a milisecond when you press on the shift lever. I'm not sure how effective this is and I'm not thouroughly educated on the matter either.

    They have other models that let you shift both directions. I don't remember exactly how it all works but do know they are out there. Mainly used for racing and honestly don't serve much of a purpose on the street unless you just want to spend money because you have an excess of it

  12. #10

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    935
    Quote Originally Posted by TL chris
    I never heard of an electric shifter. I don know they have air shifters for drag racing bikes.
    Yeah, air shifters are the only ones I knew about too.. I have a few friends that drag down at MIR.

  13. #11

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    Like I said, I'm not thouroughly educated on the subject

  14. #12

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    APK Developments Air Shifter ECU

    Hello,

    The electric shifter you are questioning is the same name as an air shifter. They are sometimes called an electric over air shifter too. The most popular shift controller out there is from MPS www.mpsracing.com

    For those interested in the latest and greatest, we have introduced a new "closed loop" air shifter that gives you full throttle up-shifts at the push of a button. Below is a description from our site:

    The MS120 is a semi-automatic up-shift control unit. It is for use on sequential gearboxes, like motorcycles. It’s digital operation features a closed loop system to give you the fastest shifts, at the touch of a button, even at full throttle. When the shift up button is pressed, the ECU will cut the ignition and wait the user adjusted kill time. It then actuates the shift cylinder to perform the shift. A shift cylinder sensor monitors when the shift has been completed. When the shift is completed, ignition is restored. No time is wasted, as this method uses only the time needed to complete the shift. The system also features a "Kill Safety" function, which, if a shift has not been completed within 200 ms, the ECU will abort the shift to prevent the engine from turning off completely.

    For more information, you can visit www.apk-developments.com

    Thank you,
    Alex

  15. #13

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    935
    Solicit-much?




    P.S. Thanks for the info

  16. #14
    Rock it!

    My Bike(s)
    87 GSX-R 750
    Location
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    I have an old Rodon from the 80s. Heh heh, just don't have your foot under the shifter when cornering.



    - Nut

  17. #15

    Posts
    304
    I've heard/read that not using the clutch to upshift is easier on the part especially the clutch plates....that's coming from the Ienatsch's, Parks, Houghs of the world......I'm pretty sur they have better mechanics and more money than I do so that may be a factor.

    I tried it today while riding and found it to be pretty easy and definitely quicker.

    I probably wouldn't do it all the time but during a spirited twisty run I may.


 
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