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Thread: DIY: Shiver Valve Check, Illustrated

  1. #31
    apriliaforum expert bonehead's Avatar
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    How?
    Just cutting?

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  2. #32
    apriliaforum expert Gabro's Avatar
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    just pull it out from the airbox:

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  3. #33
    apriliaforum expert shekel's Avatar
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    Presumably removal of the snorkel this will make the engine run even leaner?

  4. #34
    apriliaforum expert bonehead's Avatar
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    Hence........ Memjet.

    Thanks Gabro.
    Will give it a try as part of the Memjet experiments.

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  5. #35
    apriliaforum expert shekel's Avatar
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    Mate there are a lot of people hanging on your memjet experimentation.

  6. #36
    apriliaforum expert bonehead's Avatar
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    I can't stand the pressure.

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  7. #37
    apriliaforum expert maxpower220's Avatar
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    Quote Originally Posted by shekel View Post
    Presumably removal of the snorkel this will make the engine run even leaner?

    Has anyone actually gotten the A/F ratio on a dyno? Everyone continues to say the bike is running lean, but how do you know. A closed loop Lamba FI system "should" compensate for most anything. I understand the the FI system from the factory is set lean to meet emission standards, but exhaust and intake changes would be compensated for by the FI to remain at the stock level. A new air filter and exhaust doesn't allow that much more air through the motor.

    Any documentation would help me "believe".
    Last edited by maxpower220; 07-26-2009 at 04:23 PM.
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  8. #38
    apriliaforum Member Guyf's Avatar
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    Quote Originally Posted by maxpower220 View Post
    Has anyone actually gotten the A/F ratio on a dyno? Everyone continues to say the bike is running lean, but how do you know. A closed loop Lamba FI system "should" compensate for most anything. I understand the the FI system from the factory is set lean to meet emission standards, but exhaust and intake changes whould be compensated for by the FI to remain at the stock level. A new air filter and exhaust doesn't allow that much more air through the motor.

    Any documentation would help me "believe".

  9. #39
    apriliaforum expert bonehead's Avatar
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    As I understand it they are not allowed to make maps that break the euro regulations.
    If they do it has lots of red "not to be used on the road" signs on the axone.
    So it will run lean until you fiddle with the injection. Possibly even a bit leaner with pipes and air though possibly not 'cos of the Lambda FI system as you say.
    But as I said, we know how our bikes behave and I've read and heard so many times of exactly these symptoms from running euro reg lean so that is why I spent my dollars on the Memjet.
    Anyway, we'll soon see.

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  10. #40
    apriliaforum Member Guyf's Avatar
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    Thanks to the never ending rain we get, (and to petemoss of course) I did the valve check on my Shiver. 4,700 Km. All valves within specs.

    Front cylinder: Exhaust: .208mm - .208mm
    Intake: .110mm - .127mm

    Rear cylinder: Exhaust: .160mm - .160mm
    Intake: .127mm - .127mm

    So most are right on the tight side of the spec. I assume they will loosen up as the engine wear, right?
    Last edited by Guyf; 07-26-2009 at 01:49 PM. Reason: Typo

  11. #41
    apriliaforum expert bonehead's Avatar
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    I believe they tighten.

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  12. #42
    apriliaforum expert CessnaTPA's Avatar
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    Quote Originally Posted by Guyf View Post
    Thanks to the never ending rain we get, (and to petemoss of course) I did the valve check on my Shiver. 4,700 Km. All valves within specs.

    Front cylinder: Exhaust: .208mm - .208mm
    Intake: .110mm - .127mm

    Rear cylinder: Exhaust: .160mm - .160mm
    Intake: .127mm - .127mm

    So most are right on the tight side of the spec. I assume they will loosen up as the engine wear, right?
    Here is a pretty good link about it http://www.dansmc.com/valveclearence.htm
    I just did my own valve check yesterday and one of my intakes was out of adjustment.
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  13. #43
    apriliaforum expert CessnaTPA's Avatar
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    Completed Valve Adjustment

    I just finished adjusting one of my intake valves. Overall it's not that hard to do, I think anyone with average mechanical ability could handle this task.
    I'll post later with some pics on how I did it.
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  14. #44
    apriliaforum Member spook's Avatar
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    I know its been a while since this thread was started, but Id like to thank Petemoss for his outstanding guide, helped me with valve check I did today.
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  15. #45
    apriliaforum expert marksim's Avatar
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    Thanks Spook for bringing it to my attention
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