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V85TT tappet noise.

Discussion in 'V7/V85/V9 Chat & Tech' started by Bob Bourget, Aug 18, 2021.

  1. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    When the bike was new {purchased Dec 2020}, the motor was very quiet. Once I crossed about 1500 miles, she became quite tappy, more so on the right than the left. Did the requisite valve check, and found one loose intake on the left cylinder, one tight exhaust on the right. Not excessive at all, just needed a tweak to be in spec of the .004 I / .006 E. I'm new to Guzzi's so this light tapping might be very normal. You can hear it {especially at light throttle just coasting at around 3K} with a helmet on! Not so much when the visor is down, lol.
    Question....{and I missed this}....why is it a necessity to start with the left side, then go to the right? Just curious more than anything. I have since re-checked it using this method and found no difference in the measurement.
    I have about 3500 miles on it now and it has not gotten any worse {or better}. Well aware that tappy valves are happy valves, but when NEW it was much quieter. Seems strange because the norm is for valves to tighten over time, not vice-versa. Can't seem to locate a video of another sound bite for comparison sake........thoughts?
     
  2. vagrant

    vagrant GT Reference

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    This is not an overhead cam engine. Guzzi's get loose not tight. At the 900 mile check the exhausts should have been 1-2 thousands loose and the intake anywhere from right on to 1 loose. Are you 100% sure you were on TDC of the intake stroke? Easy to be wrong for the inexperienced.
     
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  3. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Not necessary to check the left first, but if you set the left then go to the right you don't have to turn the engine over very much. Also the tapping is normal. If it gets quiet, then worry.
     
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  4. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    Yup, very sure. Plastic straw, watched the intake valve close then allowed to go up to TDC.........
    Question for you.......why would the method of valve actuation affect whether they tighten or loosen? I don't know of any time driven 4-stroke engine that will result in loose {r} valve-to-actuation clearance. When valves seat, tolerances tighten.
     
    Last edited: Aug 18, 2021
  5. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    Ahhh, makes sense. I kinda figured it was something like that. Just curious though as to what setting they use at the factory when they are set. It MUST be tighter to allow for this "loosening" of the valvetrain for break-in.
     
  6. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    You need a louder exhaust system!

    Tappy valves are happy valves.

    Jason
     
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  7. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    I have Todd's y-pipe and am VERY happy with the tone over stock. I just need to accept the fact that these motors make "music", and not "noise", lol. All I really need is to hear another.........! That's one of the things I like about this ride....no one else has one locally anyways. IMG_0062.jpg
     
  8. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    That's a good looking adventure bike!

    I have a KLR that is similarly outfitted with Givi hard bags.

    Jason
     
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  9. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    I had 2 KLR 650's, a first gen 2006 and second gen 2012. Loved them both. The ONLY issue I had was the power. It would suffice but I wanted a bit more. Traded it for a mint Vstrom 650 then traded it for this one......They were all fitted accordingly as well. This goose is just a bigger KLR....:)
     
  10. vagrant

    vagrant GT Reference

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    Somebody will give you a much better explanation, but, there are lots of wear spots on a Guzzi. Cam, long pushrod, rocker and its pin, valve, so loose it is.
     
  11. kiwi dave

    kiwi dave GT Reference

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    I've measured the valve clearance on a hot motor and compared it to the cold motor on many of my Guzzis. In every case, the gap gets larger, not smaller.

    So why not run with reduced tappet clearance to reduce the noise? So far, I haven't been game. :worried:
     
  12. Bob Bourget

    Bob Bourget Tuned and Synch'ed

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    I don’t think anyone is suggesting the theory of cold vs hot measurements, but wear in over time.
    As you stated, I’d love to experiment with a bit tighter tolerance but…..like you I’m not game.
     
  13. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    And a much more powerful KLR!

    Jason
     
  14. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    The recommended valve lash per the MG manual for my 2010 V7Cafe is 0.004" Intake and 0.006" Exhaust. However, I set the lash at 0.006" Intake and 0.008" Exhaust. I can hear a bit of ticking at idle when first started, but it's pretty quiet after the motor warms up, especially at speed. But my Agostini exhaust system is loud enough to cover most tappet noises.

    Jason
     
  15. kiwi dave

    kiwi dave GT Reference

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    The manual I have agrees with your setting.

    upload_2021-8-19_13-47-36.png
     
  16. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    Oddly enough, my "Service Station Manual" calls for 0.004" and 0.006"; see below. ValveLash.JPG
    This information contradicts the clearances in the engine manual. But setting them to the looser spec in the engine manual allows for more wear between valve seat and valve.

    Jason
     
  17. vagrant

    vagrant GT Reference

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    For the V7III 4&6 is supposedly correct.
     
  18. JasonC

    JasonC Cruisin' Guzzisti GT Contributor

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    Please excuse my ignorance relative to the Guzzi models, but does the V7III have the same engine and ECU as a 2010 V7 Cafe Classic?

    Jason
     
  19. vagrant

    vagrant GT Reference

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    Not the same heads many other updates
     
  20. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Only "US-spec." Both Euro spec and the sticker under the seat, even on US models puts them at .006/.008"
     

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