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  1. #1
    zixaq (OP)
    Super Member Hiccup in power delivery accelerating in 2nd. very troubling. zixaq's Avatar
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    Hiccup in power delivery accelerating in 2nd. very troubling.

    Hey all, I need experts.

    Sometimes (hard to repeat), when I'm accelerating hard in 2nd gear, there is an abrupt stop/start to power delivery that lasts less than half a second. The engine tone doesn't change much, so it seems like it has to be something in the transmission. How bad a thing am I looking at?


    1. Engine sound doesn't change except possibly to speed up a little, but it's such a fast glitch that I'm not sure. Anyway, I don't think it's an engine, fueling or electrical problem, but I'll entertain ideas if you disagree.
    2. Chain and sprockets still look good. They're fairly new (10k ish) and high quality and the chain tension is correct.
    3. I'll be checking the clutch at the next oil change, although I don't know how the clutch could cause an abrupt transition only in one gear.
    4. I cannot reliably repeat it, and it only happens under specific circumstances. I think it happens at around 9k rpm, but I've only caught a glance at the tach once, so I don't know if that's always the same.

  2. #2
    Senior Member bricksrheavy's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Quote Originally Posted by zixaq View Post
    ...
    there is an abrupt stop/start to power delivery that lasts less than half a second. The engine tone doesn't change much, so it seems like it has to be something in the transmission...
    Had the exact same symptom when my kill switch started to act up, once it got worse (and it got worse in a matter of weeks) it began shutting the engine off mid ride.

    Only thing, if this ONLY happens to you in 2nd gear then we can rule the kill switch out.

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  4. #3
    Vrrroooooom! Hiccup in power delivery accelerating in 2nd. very troubling. Motogiro's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    A common intermittent source is tbe kill/red/emergency switch. You might make a temp jumper to see if the glitch is eliminated. Sometimes it is a frequency specific vibration that causes a fast make/break connection.

    Sent from Moto's Motorola
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

  5. #4
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Quote Originally Posted by bricksrheavy View Post
    Had the exact same symptom when my kill switch started to act up, once it got worse (and it got worse in a matter of weeks) it began shutting the engine off mid ride.

    Only thing, if this ONLY happens to you in 2nd gear then we can rule the kill switch out.
    Not necessarily...

    If the vib's are just right at only that RPM/load, it could indeed be the kill switch...

    Zixaq, do you use the kill switch regularly?


    Plus one on by passing the switch for testing purposes...



    .
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  7. #5
    zixaq (OP)
    Super Member Hiccup in power delivery accelerating in 2nd. very troubling. zixaq's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Quote Originally Posted by TownsendsFJR1300 View Post
    Not necessarily...

    If the vib's are just right at only that RPM/load, it could indeed be the kill switch...

    Zixaq, do you use the kill switch regularly?


    Plus one on by passing the switch for testing purposes...



    .
    I've used it on purpose maybe twice?

    For chuckles I turned it off/on really fast the other day while riding, has a totally different feel/sound than the symptom I'm describing.

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  9. #6
    Vrrroooooom! Hiccup in power delivery accelerating in 2nd. very troubling. Motogiro's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Could be clutch related but I would think it would show other than just 2nd gear. The other might be to double check that front sprocket to make sure it's secure on the spline. Make sure all the cush drive inserts are sound and present. Check the swing arm bearings. Why only second gear? Check that your side stand is snug and check the side stand safety switch and wires.
    If you want to eliminate the kill switch you would have to jump it. You can't turn it on and of at hundreds/thousands of times per second by hand. If it is frequency related to vibration, you'll want to run a jumper.
    Last edited by Motogiro; 01-19-2018 at 02:19 PM.
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

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  11. #7
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    On rare occasions, the side stand switch can fail and cause issues. It's pretty easy to R & R clean-re-grease.

    Flipping the kill switch momentarily most likely will NOT "feel/sound" the same as IF it was worn/crappy contacts inside, especially under load at high RPM's.

    I would jump that RED kill switch WAY before pulling the clutch. It's a common and documented issue.

    If the clutch is not slipping/acting up in FIRST GEAR, it's very, very UN-LIKELY to be your issue nor the transmission..
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  13. #8
    zixaq (OP)
    Super Member Hiccup in power delivery accelerating in 2nd. very troubling. zixaq's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Thanks for all the help, but it looks like resolving this is going to have to be put on hold for a month or two while I heal up and fix more obvious problems.

    I went down hard (although not going very fast) last Thursday and just got out of the hospital on Sunday. Bike lost the right footpeg, bent the handlebars and dented the tank up pretty good. Looks like it was probably a highside. I escaped with a few broken ribs, bruised lung, small pneumothorax and a medical bill that I haven't seen yet but already has me sweating bullets. I don't actually know what happened, as I can't remember it except for a few scary images. Seems weird that I would just highside out of nowhere on flat, straight road at 30 mph, but if someone else clipped me they didn't stop, so I'll never know.

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  15. #9
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Wow!! Heal up, the bike will still be there...
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  16. #10
    Vrrroooooom! Hiccup in power delivery accelerating in 2nd. very troubling. Motogiro's Avatar
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    Re: Hiccup in power delivery accelerating in 2nd. very troubling.

    Quote Originally Posted by zixaq View Post
    Thanks for all the help, but it looks like resolving this is going to have to be put on hold for a month or two while I heal up and fix more obvious problems.

    I went down hard (although not going very fast) last Thursday and just got out of the hospital on Sunday. Bike lost the right footpeg, bent the handlebars and dented the tank up pretty good. Looks like it was probably a highside. I escaped with a few broken ribs, bruised lung, small pneumothorax and a medical bill that I haven't seen yet but already has me sweating bullets. I don't actually know what happened, as I can't remember it except for a few scary images. Seems weird that I would just highside out of nowhere on flat, straight road at 30 mph, but if someone else clipped me they didn't stop, so I'll never know.
    Ouch! Sorry to hear you were injured. Take your time. If you have broken ribs It will be a while before you're safe to ride again. Broken ribs are painful. You'll get an idea if you sneeze or have to cough. Don't ask me how I know....

    If you don't remember what happened beware you were experiencing a glitch with the bike and now you want to confirm that something on the driveline or other part of the bike did not fail.

    Get better!
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

 

 
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