V star 1100 custom needs choke half open to not miss at high end

SOURCE: Yamaha V-Star 1100 Custom stalls when downshifting

sounds more like a fuel problem to me. is it cold there did you use stabilizer in the gas? try some berrymans B12 in the gas it cleans everything up internally. it worked for me

SOURCE: yamaha v star 1100 blowing head lights

How's the battery holding up? Check the voltage on the battery and also check to see if it is bubbling a lot. 13.8V is optimal for the battery charging with the engine running, but up to 14.4 is common. If it's running a lot over that and the battery is making a lot of bubbles, probably the regulator is the problem.

If the battery is low on electrolyte, the regulator doesn't have anyplace to dump electrons, and that could also be a problem, so make sure the battery connections are good and tight, too.

SOURCE: Yamaha V-Star 1100 backfires and will not run without choke on

Here are two solutions for you:
A - Take the carberator off and soak it in some good quality carb cleaner for about 1/2 an hour.  That should take care of any residue in the carbs.
B - Alternatively (and for the less technical minded) there is a great product called Sea Foam.  Try to find it at your local CSK auto/NAPA/Wal-Mart.  Pour a small amount (maybe 1/4 ounce) into each cylinder chamber (take out the spark plugs), try to pour a small amount into the carbs (a turkey baster works great for this), and pour the rest into the gas tank.  Let it sit for 5-10 minutes, then start it up.  *NOTE - the bike will start VERY hard at first until it burns through what's in the cylinders.  ALSO the fumes will be EXTREMELY strong and suffocating - make sure you do this OUTDOORS preferably, or at least in a VERY well ventilated area.
Good luck - I know how frustrating these things can be! :)
P.S. - I am a proud owner of a V-Star 1300 - great bikes! :)

Chris Hall

• 842 Answers
• Posted on Oct 09, 2009

SOURCE: Yamaha 1100 Drag Star 2001 Custom motor starter,

These parts are fairly reliable. Rather than buying new, you should be able to pick one up from a motorcycle breaker who will post it to you. I would expect to pay about £60-£100 tops in the UK (Depending on mileage). ANy Yamaha dealer will be happy to order you one new, but they are a hell of a price!

SOURCE: my bike will not idle unless the choke is on just

I had the same problem with my 2000 V Star 1100. It started out like yours, only running with the choke on a little bit. It got progressively worse. Turned out to be cracked rubber intake manifolds that join the carbs to the cylinders. It happens as your bike gets older. My rear manifold failed first, then six months later, the front one. Mine was bad enough that the bike quit firing on the front cylinder. You may have to take the carbs off to be certain, mine had failed on the inside around the vacuum port. It causes a loss of vacuum resulting in fuel not being pulled into the cylinder from the carb. It's not a hard job, just a pain ! If it hasn't happened already, look for your voltage regulator to fail as well. :o) Hope this helps, Geno