Question about 2007 Yamaha V Star 1100 Custom

2 Answers

I have a 2007 1100 v-star that sat for 6 months.

I have a 2007 1100 v-star that ran great, but sat for 6 months. It would not run after that, so I cleaned the carbs as described by my clymer manuel. Now the bike will not accept throtle past 1/8 - 1/4 and then stalls. If I cover the mouth of the carb with my hand. Then it will rev, but back fires and pops back through the carb. I have adjusted the float so that they almost touch the top of the bowl and this has not changed much (before this the bike would only idle). Also, the idle air screws have been backed out 4+ turns which helped slightly. Inspite of everything it still seems lean... What should I look at next to fix this bike?

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  • birdman29126 Apr 23, 2010

    I have throughly cleaned both carbs, and yes I used fresh gas. The fule filter is new and the bike runs as if it cant get enough gas.

  • birdman29126 Apr 24, 2010

    I first fully assembled the bike and it would not rev past 1/4 throttle unless I covered the air filter. I have the floats so high that fuel should be dumping into the engine. Something seems to be clogged or out of adjustment and I do not know where to check next. I have been through both carbs and the fuel system and don't know where to look now.


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Hi and welcome to FixYa,

Initially, 2 parts of the above description are significant:

  • lean - which indicates that there is too much air, too little fuel; and
  • "...cover the mouth of the carb with my hand..." - which could only mean that the air cleaner/filter is not installed.

Have you tried with the air filters installed?

Good luck and thank you for asking FixYa.

Posted on Apr 23, 2010

  • Louie  Role
    Louie Role Apr 24, 2010

    Appreciate the additional information.

    To confirm fuel starvation, drain the carbs to separate containers; compare fuel quantity from each and guesstimate if the drained fuel is roughly equal to what the bowl should be holding.

    Others to consider depending on the version:

    • fuel cut solenoid at the bottom / side of the bowl;

    • roll over valve along the fuel line between the tank and the emission canister;

    • outer vent valve between the canister and the carbs;

    • fuel pump.


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Same gas? Make sure your gas is fresh.
Overall though the bike is still not getting fuel like it should. Something is not clean.
Start at the tank and make sure it flows plenty of gas. Some have screens in the bottom that can get dirty.
Next check the fuel filter and change it if you haven't in a while.
Make sure the fuel line flows plenty of fuel from the tank to the carb.
Next the carbs need stripped and soaked in cleaner. Every little passageway needs checked. You should not need to change float levels or mess with Idle air.
Make sure the choke circuit is working.
If you go through each step above starting with fresh gas it should work. If it doesn't you will have to take it to a repair shop. Taking it to a shop that specializes in bikes makes it their problem. OR you could just buy a replacement carb. Personally I think a very though clean job that includes a carb gasket kit and blowing all the passsages out and rodding them with piano wire if necessary will do the job.

Posted on Apr 23, 2010

  • Bryan Fullerton
    Bryan Fullerton Apr 24, 2010

    Did you test the TPS?
    Does the variable venturi slide operate like silk on glass?
    Also make sure no gasket material is squished out over a vent.
    I sure wish I had it in hand. Would be soo much easier.


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