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V7 Classic rough patch at 3500 rpm

Discussion in 'V7/V85/V9 Chat & Tech' started by Cylvabirch, Jun 12, 2017.

  1. Cylvabirch

    Cylvabirch Just got it firing!

    Joined:
    Jan 19, 2016
    Messages:
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    Location:
    Whitehill, Hampshire, UK
    Hi, I hope someone here can help me.
    I have a 2011 model V7 Classic that has covered 12500 miles, 3500 with me over the last two years.
    I have an issue with the bike running sweetly up to 3000 rpm and above 4000 rpm but in between it just does not feel happy and I have ended up trying to avoid running it at about 3500 because it is unpleasant and has vibrations.
    The map was updated last year by a Guzzi main dealer and the throttle synchronisation and by-pass settings have been very carefully set by an expert Guzzi tech here in U.K. I have fitted a Finebau Forge Aeroplus-Lite on its default setting to clean up the awkward running at low speed when cold or very hot. The valve clearances are exactly correct.
    Any ideas? Is there an inherent issue with the V7 engine that it has a vibration period in this rev range?
    David.
     
  2. RedHawk47

    RedHawk47 Tuned and Synch'ed GT Famiglia

    Joined:
    Jul 22, 2014
    Messages:
    93
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    Location:
    Berthoud, CO
    Have you replaced your spark plugs and caps?
    sparkplugs with NGK CPR8EA-9 and sparkplug caps with NGK XD05F.
     
  3. DK-V7classic

    DK-V7classic Tuned and Synch'ed GT Contributor

    Joined:
    Nov 11, 2016
    Messages:
    26
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    24
    Location:
    Denmark
    Have a look at the TPS, May need a good cleaning or replacement.
     
  4. organfixsing

    organfixsing Cruisin' Guzzisti GT Contributor

    Joined:
    Jan 10, 2013
    Messages:
    133
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    Location:
    ROMA
    My V7II vibrates a little 3000 to 3500 revs. At one stage the vibration suddenly increased in magnitude. Investigation revealed that I had neglected to lock up the left hand inlet valve tappet. Readjusted and locked, problem solved, but, back to the minor vibration between 3K & 3.5K revs.
    Cheers
    Brian :)
     

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