snappy throttle

Discussion in 'Mechanics Garage' started by ianf1, May 13, 2006.

  1. ianf1

    ianf1 New Member

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    I recently purchased a 2006, black VFR after not owning a bike for a number of years. I've been finding the throttle ultra sensitive when I back off and are coming back on the throttle again. (especially in lower gears)
    I'd just put this down to a need for me to get used to it again and gain some more throttle control. (my last bike a K100 was much more docile)
    Whilst reading through the forums on another VFR site I noticed a heap of letters about problems with the starter valve setting on the VTEC VFRs. There's a multitude of letters claiming that they need to be balanced in order to stop this throttle snap and this isn't been done on a lot of new bikes due to a discrepancy in the workshop manual.
    My question is why is: if this is a real problem why can't I find anything on this site about it? Does this problem really exist? Or is it just people getting carried away with things on the other site?
     
    Last edited: May 18, 2006
  2. Legs

    Legs New Member

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    Learn to use your throttle

    Not to seem harsh, but learn to use your wrist.

    When you're in bed with the opposite sex, you use a little finnesse. Do the same w/your scooter!:drum:
     
  3. jethro911

    jethro911 Member

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    I don't know about the V-tec viffers but my 98 is pretty sensitive. I really notice it when riding at very slow speeds 20 to 30 mph on a rough road surface. The bumps can cause involuntary throttle chops and accellerations. I try to mitigate this by taking as much weight off my hands as possible and sometimes getting out of the saddle, off road style. On smooth road, no issues.

    :drum:
     
  4. Adam Wright

    Adam Wright New Member

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    had the same problem with my 04 model. Took most of the slack out of the throttle and it seemed to help a bit. It's quick and easy to do and if you don't like it it's just at easy to put back. But overall i agree with you. it's pretty jerky down low.
     
  5. Jake

    Jake New Member

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    I guess this is pretty common on early generation fuel injection systems on motorcycles. It comes about because an engine needs to be carbureted very lean in the lower revs to pass emissions regs and that leads to snatchy off-idle throttle response. It does surprise me that they haven't fixed it in the Gen6 VFR though... The off-to-on throttle response on my '98 was so tight that it felt dangerous at walking speeds in sandy parking lots... You needed the throttle control of a monk to keep the rear from wanting to step out in low-traction situations.

    Anyhoo, I fixed it by installing a Power Commander II (just running the stock map). It fixes the problem by richening up the mixture in the lower end of the rev range. Much smoother (almost carb-like) off-idle response but without the hesitation of a carb. The throttle is stil RIGHT THERE, but it ramps up in a bit more civil manner. A PCIII would allow you to do the same thing (but would cost more).

    I've read that the problem can also be fixed with a Turbo City fuel pressure regulator, but I have no first-hand knowledge of this fix.


    HTH,
    Jake
     
  6. reg71

    reg71 Poser Staff Member

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    Interesting. I have wondered if a PC would be a worthwhile investment. I too have noticed that it's hard to go slow from the start. My solution thus far has been take off fast. :)
     
  7. ianf1

    ianf1 New Member

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    Thanks for the feedback guys. I'm off to an advanced skills coursed tommorow (was cut short due to torrential rain last time) I'll let one of the "experts" thrash my pride and joy just to make sure it's not just me. I'll also talk to my service mechanic about it. Interesting though that there was so much talk about the balancing of the starter valves on WWW.bikersoracle.com/vfr/forum.:smile:
     
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