vstar 1100 front cylinder not firing
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  1. #1
    Newbie
    My Bike(s)
    2001 V-STAR 1100
    Location
    northwest arkansas
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    10

    vstar 1100 front cylinder not firing

    the front cylinder wasn't firing, the rear was.
    took carbs off and cleaned, now front cylinder is firing but the rear isn't.
    anyone heard of this happening.

    thanks for your time and any information...peace

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  3. #2
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
    Location
    NW Pa.
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    187
    https://redirect.viglink.com/?format...r-must-do-list there are a couple things to know about the 1100, never give it throttle when starting, it can ruin the expensive starter clutch. and check the mid shaft nut it can loosen and break the shaft.there is a good chapter on performance mods......your pilot jets are probably clogged make sure all the little holes are open.

  4. #3
    Super Moderator

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    Quote Originally Posted by nickbehavin View Post
    .....your pilot jets are probably clogged make sure all the little holes are open.
    Assuming that it has a manual choke, does it smooth out after it has run for a minute and you put the choke partly ON ?
    Does it smooth out if you open the throttle a bit so that it speeds up ?
    If the carbs are identical, maybe you switched them when putting back on ??
    Don't believe everything that you think.

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  6. #4
    Newbie
    My Bike(s)
    2001 V-STAR 1100
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    northwest arkansas
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    Quote Originally Posted by Easy Rider View Post
    Assuming that it has a manual choke, does it smooth out after it has run for a minute and you put the choke partly ON ?
    Does it smooth out if you open the throttle a bit so that it speeds up ?
    If the carbs are identical, maybe you switched them when putting back on ??
    it idles ok with choke and without, when i start giving it gas it begins to sputter. after i get rpm's up it smooths out.
    when riding once i open the throttle it smooths out and takes off, feels right.
    don't go far just up the road and back. oh yea the the exaust on rear cylinder gets warm but not really hot.
    the carbs only go on one way.
    thanks very much for the reply...peace
    Last edited by PaPa53; 08-22-2019 at 01:50 AM.

  7. #5
    Super Moderator

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    OK, given that better description of the problem..............
    I suggest a healthy dose (two OZ per gallon of fuel) of Berrymans B12 chemtool in the gas and then run it a few times over a few days.
    Run long enough to get it warmed up good.
    You can get the cleaner into the carbs quicker by draining the bowls.

    Does it have the stock air box and filter on it when you are "testing" ? That can be important.
    Don't believe everything that you think.

  8. #6
    M-J Lifetime Achievement Award
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    Yes^ sounds like the idle circuit of the offending carb is blocked. Wouldnt worry about why it seems to have swapped cylinders...probably both were semi blocked and now one cleared and the other clogged up worse...might be due to draining the fuel.
    Smoke me a kipper I'll be home in time for breakfast

  9. #7
    Newbie
    My Bike(s)
    2001 V-STAR 1100
    Location
    northwest arkansas
    Posts
    10
    Quote Originally Posted by Easy Rider View Post
    OK, given that better description of the problem..............
    I suggest a healthy dose (two OZ per gallon of fuel) of Berrymans B12 chemtool in the gas and then run it a few times over a few days.
    Run long enough to get it warmed up good.
    You can get the cleaner into the carbs quicker by draining the bowls.

    Does it have the stock air box and filter on it when you are "testing" ? That can be important.

    yes still has stock air box and filter.

    thanks again for info...peace

  10. #8
    Newbie
    My Bike(s)
    2001 V-STAR 1100
    Location
    northwest arkansas
    Posts
    10
    Quote Originally Posted by Aussie Steve View Post
    Yes^ sounds like the idle circuit of the offending carb is blocked. Wouldnt worry about why it seems to have swapped cylinders...probably both were semi blocked and now one cleared and the other clogged up worse...might be due to draining the fuel.
    thanks, that sounds logical.

    thanks for your time and info...peace

  11. #9
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
    Location
    NW Pa.
    Posts
    187
    if you can ride it berrymans might help.it has to be flowing thru to have a cleaning effect.pull the carbs and take carb cleaner and squirt it thru the pilot jet passage you should see it squirting into the venturi. hold the jet up to a bright light and see thru the small holes in the side and especially thru longways.i think the pilot jet and mixture screws share the same passages so remove them and blow cleaner thru.when you install the carbs put a little soap around the lip to help slide in.they can be difficult.

  12. #10
    Ditch Magnet
    My Bike(s)
    2002 SV-650N, 2007Yamaha 1100 custom
    Location
    NW Pa.
    Posts
    187
    https://sites.google.com/site/vstar1100kb/home there is a lot of info on the carbs here.click on the top right square where it says the wkb vstar 1100 its the table of contents


 

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