675.cc • Triumph 675 Forum

Quickshifter thought experiment

Discussion in 'Accessories' started by PyroUK, Jan 18, 2016.

  1. PyroUK

    PyroUK

    Thread Starter

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    Hope this is the right place.

    I was riding home the other night and was thinking about the types of QS, push or pull.

    Now somewhere along the lines in one of the threads I'm fairly sure I was someone post that there are both pull and push QS' out there, is this correct?

    And if so, would it be possible to run a up and down quick shift on the Daytona? So clutch pretty much just to pull off and that's it?

    It's not something I'm considering doing, couldn't afford to reinvest in another QS but I am curious!!



    Also I may have more of these types of posts in the future. I appreciate the questions may have been asked in other posts but thought it would be nice to get a little discussion going here :)
     
  2. Erm interesting, I'm not smart enough to know but one thing I do no, is it will make a mess of wires as you would have to splice at least one in.
     
  3. towser

    towser

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    Short answer is no! Push or pull depends on whether your using standard shift or race shift gear change. In both cases ,push or pull, the quick shifter is used to change up a gear.
     
  4. 675KPW

    675KPW

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    The HealTech Quickshifter Easy can be adjusted to use in push or pull modes, and also has ability to be set to use for downshifts too...
    Following is copied is from the Healtech website FAQs:-

    4. Can I use the iQSE for downshifts too?
    Depending on the specific bike with slipper clutch, you may do clutchless downshifts with partial throttle from the higher gears.
    Caution: Use with care! If downshifts are not smooth on your bike, use the clutch!

    I didn't try it myself, but food for your thoughts!!!
    KPW

     
  5. My HM QS works in both push and pull, at the same time. Meaning it kills the engine on the downshift too.
    I've tried it a couple times, but as my Daytona doesn't have a slipper clutch, its pretty useless unless you manually match the revs beforehand.
    I imagine it would work if you have a slipper though
     
  6. PyroUK

    PyroUK

    Thread Starter

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    Interesting, interesting.

    Hadn't considered the actual clutch as an issue.

    So the HM is plug and play both ways or did it need mapping?
     
  7. 675KPW

    675KPW

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    " I didn't try it" .... cos I could not comprehend the logic! Here was my thinking and why I did not even try it....

    A quickshifter cuts the engine revs when up shifting..(dropping revs to allow the slower revolving gear to engage more easily).
    Why would we want it to cut revs when down shifting? Normal thinking of what is needed when down shifting is a throttle blip, to bring the engine revs up to match the faster revolving gear.
    I think the latest BM S1K and Yam R1 do clutchless blipping downshifts?

    I can see an albeit small benefit of the slipper clutch helping complete a mismatch of revs, but even then its still illogical to cut the engine revs when downshifting?????
     
    • Like Like x 2
  8. PyroUK

    PyroUK

    Thread Starter

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    Good shout, would it be possible to map a "blip" in on the Daytona?

    So if you had a push and pull shifter, have it read the up shifts to cut the revs and the down shifts to boost the revs?

    Then add in a slipper clutch and voilà you have a magical uncle Robert?

    I mean it would be risky either ways, my SV certainly felt a little worse for wear after a track day doing manual clutch less shifts and I can only imagine going down the box would add even more stress to the system.
     
  9. 675KPW

    675KPW

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    The blip would have to function the same as blipping the throttle.. to add fuel and air. I suppose it could be done on the Daytona by driving a small actuator to tweek the throttle cables for a very short duration... but this has some serious safety issues if it stayed on through a fault!

    For a bike with electronic throttle control and fly by wire it would be far easier and probably why it is only now available on the latest sports bikes.
    The same safety issue still remains... if it faults the electronics could ask for fuel and air even with the throttle grip shut off and the bike rides on itself...
    No doubt the manufacturers build in as many safetychecks and algorithims as possible but there are instances of Panigales engines running on by themselves driven by the electronics, as experienced by one of the forum members.
     
  10. There is something on the market that does this. I think it's called auto blip. I may even have post a youtube clip of it on here some time ago
     
  11. As others have said, clutchless downshift or throttle blippers are only available on bikes with ride by wire throttle, getting the sensor to detect the pull or push would be relatively easy.
     
  12. The autoblip function is usually only available on fly-by-wire throttle bikes which the daytona is not, as mentioned you could try to add an actuator in somewhere but i think this would end up being very complicated and possible dangerous
     
  13. AcB46

    AcB46

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    My quick shifter can go down the box aswell as up, I still use the clutch on down shifts tho don't think it will be great for the gear box
     
  14. AcB46

    AcB46

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    It's a annitori shifter
     
  15. It wont work changing down, the quickshifter cuts ignition which will make no difference while the throttle is closed
     
  16. AcB46

    AcB46

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    It makes it so u can change down without the clutch pulled in , I'll have to post a vid to show u what I mean
     
  17. That autoblip , im assuming its not on your triumph
     
  18. AcB46

    AcB46

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    No it's not auto blip , the quick shifter cuts the ignition both ways
     
  19. I think you're quick shifters set up wrong then, no point cutting the ignition on downshifts, that's the opposite to what you want.
     

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