temp reaches 106 the engine stops

Discussion in '5th Generation 1998-2001' started by mr.redridinghood, May 25, 2011.

  1. mr.redridinghood

    mr.redridinghood New Member

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    has anybody had this problem? each time i warm up my bike and the starting temp is below 106F, but once it reaches 106F the engine stops. when i restart it the engine stops again it continues to do this until the temp is above 110F. to over come this i choke it to 1500 rpm, after it passes 110F the problem goes away. sometimes it will cut off when i stop at a light, i restart it and keep going. if anyone have any ideas please get with me. i have to get off the computer now because i'm school. thank you very much.
     
  2. donald branscom

    donald branscom New Member

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    Please do NOT read this if you are driving a vehicle!!

    If you are in school Do not read this.
    One thing at a time.
    You did not even tell us which motorcycle or year that you own.
    We need to know the miles also.

    You say the engine stops at 106ºF.
    It does NOT mean that that the TEMP has anything to do with this problem.
    Then you say it keeps stopping on restart attempts until you get to 110ºF.
    This is completely normal. It needs choke until warmed up.


    Once it warms up if it stops (quits idling) then it gets more complicated.
    Question once it warms up did you push the choke OFF?
    Question when it quit running did you turn up the idle a little?
    Question ..what was the outside air temp?
    Is your air filter clean?

    If everything is right, and it stops idling after being warmed up then it can mean you have a tight valve.

    We need to know which motorcycle and how many miles are on it.
     
  3. mr.redridinghood

    mr.redridinghood New Member

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    thank you for taking time with my problem. the bike is a 99 VFR 800 Fi. i normally turn the choke off at around 125-130+. when the bike is nice and warm it idles at 11-1200 rpm. if i increase it won't it be to high? the outside temp does not make a difference every time on 106F the engine quits guaranteed. i will check the air filter. i just got the bike around 4 weeks ago, says its a k & n filter. the bike has 38384 miles.
     
  4. donald branscom

    donald branscom New Member

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    Your welcome.
    Stop looking at the temp gauge.
    You are leaving the choke on longer than needed.
    You do not have a problem if it idles at 1100-1200 rpm.
    if it has a K&N filter you may need to have the air pilot screw adjusted if it has carbs.
    Only if you hear backfiring or hesitation AFTER it is warmed up.
    If it is fuel injection the computer will take care of it.
    But stop linking coolant temp with weather or not the choke needs to be turned off.
    If the engine will rev up smoothly then you do not need the choke anymore.

    Try this... Put a piece of blue tape over the temp gage. Now operate it like that for two weeks. Listen to the engine. Feel if the engine is revving up smoothly.

    You just have normal worry that all new owners have getting familiar with a new machine.
     
  5. camo

    camo New Member

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    Does the fuel injection model have a manual choke???
     
  6. donald branscom

    donald branscom New Member

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    No...Fuel injection meters the correct amount of fuel for the conditions. BUT.. Many fuel injection systems have a cold start injector in the plenum chamber. It gets complicated. I want to keep this short.
     
  7. camo

    camo New Member

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    That was my point. I understand cold start enrichment. RRH said that he manually choked his engine to 1500 rpm.

     
  8. John451

    John451 Member

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    Not as such, the Gen 5 Mk 1 '99 does have a fast idle cable lever near the clutch grip which should be used until the engine warms to about 76C / 168f. The Gen 5 Mk 2 '00 to '01 is auto with a fast idle Wax Unit so no lever.
     
  9. camo

    camo New Member

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    John So it does have a lever that to the rider is a choke.
     
  10. John451

    John451 Member

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    Yep it looks just like a choke lever.

    You can see the fast idle thumb Lever in belows photo in the upright position just to the left of the clutch reservoir. Also I usually set mine to idle around 2000 until above 76C / 168f, maybe 1500 is too low for a stone cold engine ? The other thing on a '98 and up is idle / fast idle the Starter Valves are used so maybe these need balancing, mine are checked and balanced as required every major service.

    Gen 5 SV Balancing guide from UK VFR site:
    http://www.bikersoracle.com/vfr/forum/showthread.php?t=77127

    Photo from my Thread " Blinkers Not Working, before doing this try this. "
    [​IMG]
     
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