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MG800

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About MG800

  • Rank
    New Member

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  • Location
    Dublin
  • In My Garage:
    Honda VFR 800 Vetec

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  1. Hi again, I just want to give you an update. The problem was very simple in the end. I had the map sensor incorrectly connected. Thanks again for your help Mark
  2. Hi again and thanks for the advice. It is definitely my fault and I have learned from it. Thanks again
  3. Hi Grum, and thank you for your email. You have given me lots to consider. Carbs!! I did use this but only after the I noticed the problem! Are you disconnecting the MAP sensor electrically or removing the vacumm input? Just disconnecting the electrical part! Did you remove the intake funnels and place them back into the same position? It is possible the intake funnels are in the wrong place - I will have to double check this! Did you disturb any of the linkages, or alter any of the Starter Valves? I may have disturbed one of the starter valve - does this need re-synchronizing ? Did you remove any of the Vaccum hoses are there any damaged vac hoses or any vac hoses not connected? I believe these to be fine. Did you have an Fi MAP fail code indication, prior to disconnecting it? No - the bike appeared to be only running on 3 carbs, periodically but as soon as I disconnected the map sensor it runs fine! Lower picture shows damaged Molybdenum coating allowing air to bypass causing fast idle. The picture attached is what I am also seeing! I will start with the intake funnels but what would you advise otherwise and many thanks again for your help. Mark
  4. Hi all. This is the first time I am using this forum. After very little use I decided to clean around the Carbs and do a general tidy up to my 2003 vfr 800. Now it responds very poorly (chucking) in low reves. However when I disconnect the map sensor the bike appears to run fine. Any advise is appreciated. Thanks Mark
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