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Thread: DIY: Shiver Valve Check, Illustrated

  1. #61
    apriliaforum expert Mardoch's Avatar
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    No problem.
    2011 Dorsoduro 750 - Black

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  2. #62
    apriliaforum Junkie rocketnz's Avatar
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    interesting wondered how this worked

  3. #63
    apriliaforum expert BitSar's Avatar
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    I just found this post...

    @ OP - excellent information....thank you
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  4. #64
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    Sorry to bump this, but I'm in the middle of valve clearance check and looking for some clarification. When checking the clearances, does the cylinder have to be at top dead center, or just at any point where the cam is not pressing down on the valve? I Got everything apart and measured just the rear cylinder exhaust valves and they are way off, so i think I'm doing something wrong.

    The engine was not at TDC but cam is off the valve, and they were reading between .05 and .10mm (should be .16-.23). I'll try again tonight at TDC but looking for some clarification in the meantime. For those of you that did have to adjust, how far off were they?

  5. #65
    apriliaforum Junkie JetdocX's Avatar
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    Measure the clearance when the lobes are facing 180 degrees away from the buckets. That's cam lobe up. Also double check your math unless you are using metric feeler gages. Measure twice. Saves rework later.

    Mine has not needed shimming. Checked twice in the last 24,000 miles.
    From parts unknown.

  6. #66
    apriliaforum newb
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    Sorry, a couple dumb questions.

    Quote Originally Posted by petemoss View Post
    ... You want the cams to wind up in the position shown below - note the cam lobe pointed away from the top of the valve (yellow circle). There is a second cam under the cover that can be checked through the window (yellow arrow).

    The cams shown with yelow circle and arrow in the rear cylinder picture above - are they both intake? Are they the right intake and left intake respectively (i.e. yellow circle is right and yellow arrow is left)?

    Are the red circle & arrow I added to Pete's picture, as shown below, both exhaust cams (right & left respectively)?


    Should both the Intake (left & right) be checked to be within specs? Intake: 0.11 - 0.18 mm (0.0043 - 0.0071 in).
    And both the exhaust be checked? Exhaust: 0.16 - 0.23 mm (0.0063 - 0.0091 in)

    And, for the front cylinder picture below (my edit of Pete's original), pretty much the same thing?
    Yellow Circle -> Right intake; Yellow arrow -> Left intake. Spec: 0.11 - 0.18 mm (0.0043 - 0.0071 in)
    Red Circle -> Right Exhaust; Red arrow -> Left exhaust. Spec: 0.16 - 0.23 mm (0.0063 - 0.0091 in)


    Thanks!
    Last edited by venk25; 07-21-2012 at 12:44 PM.

  7. #67
    apriliaforum newb Dierick's Avatar
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    @venk25,

    the side of the outlet is the also the side of the outlet of the valves.
    Aprilia SL Shiver 750 / Alfa Romeo 147 1.9JTD 8v Squadra

  8. #68
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    I am wanting to remove the evap canister as well. Where did you route the replacement tubing? Did you route it from the 90 degree union around to the throttle body?

  9. #69
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    Quote Originally Posted by phillywv View Post
    I am wanting to remove the evap canister as well. Where did you route the replacement tubing? Did you route it from the 90 degree union around to the throttle body?
    http://www.youtube.com/watch?v=xHHCnEi0mP4

  10. #70
    apriliaforum prov-nov
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    Hey, I got .229 mm on the exhaust , should I do something ? thanks !

  11. #71
    apriliaforum expert Frodo's Avatar
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    That's on the limit of 0.23mm. Given that clearances tend to reduce over time and a little too much clearance is better than a little too little, I'd be inclined to leave it.
    Frodo
    2010 Shiver GT
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