low rpm V2-like behaviour

Discussion in 'Maintenance' started by Blade_RRunner, Mar 17, 2014.

  1. Blade_RRunner

    Blade_RRunner New Member

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    Hi,
    I have this '04 1000RR with 41,xxxx km on the clock. No smoke, pulling like crazy when revved. But below cca 2.700 rpm, when I get on the throttle, it behaves like a V2 or my ex-VFR. I mean running rough, funny "cross-plane-crank-like" uneven vibrations.
    I bought it with 18.000 kms and this was already present, but maybe just below 2.000 rpm.

    Maybe unrelated, but it seems to me as if the bike was running just a tad hotter in city these days (compared to similar ambient temps this time last year).

    Only engine mod is a flapper mod, and that was done about 2-2.5 years ago. Stock pipe, stock everything.
     
  2. Blade_RRunner

    Blade_RRunner New Member

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    OK, so I sent this one too early. :eek:

    Is this normal? Girlfriend's ex-CBR600F4i runs silk smooth from idle to rev limiter cutting in. So that would run smooth from, say, 1.400 rpm. Not much torque ;) but no jerking either.
    To be honest, I've never ridden another SC57, so I don't know if this is a feature or a bug. :)
     
  3. ColinBR

    ColinBR God Like

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    When was the last time the air filter was changed/cleaned?
     
  4. Blade_RRunner

    Blade_RRunner New Member

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    A few hundred kms ago.
    Actually, then the bike also had the throttle bodies synced. I wouldn't swear to this, but V2-ing may have just been a tad worse since then. It's nothing like the bike would stall, or not pull, just the vibration and the uneven-firing-like phenomenon (hence my analogy with the VFR low rpm feeling).
     
  5. Blade_RRunner

    Blade_RRunner New Member

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    Breaking news. For the first time this year, I filled the Blade up with standard fuel instead of the "premium" stuff I've been using so far. I've been using Shell V-Power 95 and 100, and today I filled her up with standard 95 "FuelSave" (which is just the ordinary petrol you can buy here at Shell stations). To my surprise, the V-like low-rpm shaking and roughness was only present below 2.000 rpm, which is pro'ly agreeable.
    I'm surprised though. I could understand the opposite (higher octane fuel smoothing out things), but I'm quite perplexed by this phenomenon.

    Of course, I'll have to verify and double-check by using the other stuff again, then normal stuff again, but for the time being, does anyone have an explanation?

    Have a nice weekend all! :)
     
  6. ColinBR

    ColinBR God Like

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    Is it possible that your petrol station has some water in they're tanks?

    I know that the local petrol station to me has water in they're premium fuel tanks after twice finding my Subaru misfiring using theyre fuel.
     
  7. Blade_RRunner

    Blade_RRunner New Member

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    Was gonna try a different station, but your comment further pushes me in that direction.

    Also, my bike seemed to run a few degs lower today in towns. Less V2-like virbation, more gorowling sound @ low revs, lower engine temp... I know this sound a bit paranoid, but that's what I experienced.
     
  8. ColinBR

    ColinBR God Like

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    I'd give it a try mate.

    I had all sorts of worrying when it happend with the car. I even phoned the garage I bought the car from, and had it booked in. Only for me to refill closer to work and it was back to normal.
     
  9. The.kickboxer

    The.kickboxer Active Member

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    If it helps, my 05 hated premium unleaded and my Ducati wasn't keen either.
     
  10. Blade_RRunner

    Blade_RRunner New Member

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    Well, mine is an '04, which should be the same as the '05, so now we can say that this is a common experience. ;)
     

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