Suzuki Bandit 1200S Gets hot then stops?

[CoreRSystems]

Just recently bought a 2002 Bandit 1200S with 4000 miles. The bike is nearly mint. I test rode this bike twice only traveling 5 or so miles. no problems. I made the purchase and trailered it home. I went through with a fine tooth comb cleaning etc. I have been riding it every other day until last Sunday. I rode 2 miles to the store to get a couple things. Seems like it got hot and shut off. I started it again and got through the intersection. It cut out again. I coasted to where I was going and shut it off. Came back and fired it up, it got me home. I let it run for ten minutes and then road 2 or 3 miles. No problem. I took it to my mechanic and it happened to him as well. It gets warmed up and stops. He is so busy where he works. He recommends taking it to the Suzuki dealer. He is thinking coil or ignition. Thoughts?
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David Welch

[Vincent]

Fuel starvation? Blocked tap or a trapped breather pipe?
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Space Is Deep

[davebike]

Could be fuel as said

But oil! has the oil and oil filter been changed ?
Bikes the stand long periods or do very low mileages have lot of problems
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Dave
NC750Xdct + others at work !
davebike1@gmail.com

[bodger]

Surprised the mechanic thought it might be coil at fault as there are two on the bandit I believe.
Maybe one could be faulty be surely the other would still operate two of the cylinders and it wouldnt cut out completely.
I used to have a Honda that would give similar symptoms as yours when the CDI was on its last legs.
Hope its something more simple like fuel starvation.

[Bezzer]

Try running it on the Prime tap setting that will bypass the vacuum line and any diaphragm problem in the tap which is common on the Bandit. Bandits do run pretty hot as standard being an oil cooled motor, may just be a coincidence as it warms up it cuts out due to fuel starvation. Mine did similar once and was just the vacuum pipe half off the tap spigot, ran it on Prime until I got home and replaced it- you can see the pipe but it's a pig to get at on a mk2 without lifting the tank.
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I used to be indecisive but now I'm not quite so sure.

[CoreRSystems]

Thanks for the reply's. The mechanic said he didn't think it was a fuel issue.. I just changed the oil, filter and put in a K&N air filter. Whats crazy is after my first time it cut out, I let it set for 10 mins and came back out and started it. Let it get good and warm and then put 3 miles on it in the subdivision going from 0-60 back and forth. Nothing. Then I took it to the mechanic and it stalled on him. My friend's son race moto cross and when I told him what it was doing, he said vapor lock. I think I will try the prime as stated above. When the bike runs it is a hoss. This bike fly's. So smooth and quick. It does have to ignition coils. The guy averaged 500 miles a year on this bike. Its impeccable.

Thanks for the posts.
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David Welch

[stinkwheel]

Sounds like classic symptoms of a blocked fuel tank breather. Air has to go back into the tank as fuel comes out or a vacuum will form and no more fuel can come out. If that breather is blocked, it'll run on what petrol can come outthen stop. After a while, the vacuum disappears again (because it's rarely a complete blockage) and fuel flow resumes.

They will usually idle indefinately because they only sip fuel at idle. The harder and faster you ride, the quicker it'll happen.

Try it with the fuel cap open. If the problem goes away, that's your problem. If you were to open the filler cap just after it happens, you'd get a sucking in of air. In an extreme case, you may not actually be able to open the cap at all until the vacuum equalises.

I seriously doubt it's even possible to overheat a bandit 12 engine in 2 miles.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Bezzer]

You didn't mention you'd taken the tank off and it happened straight after, pound to a pinch you've pinched/kinked a line. Did the "mechanic" take the tank off when he looked at it? if not then he's not much use as the first thing is to check what you've done immediately before the problem.
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I used to be indecisive but now I'm not quite so sure.

[CoreRSystems]

He did not not take the tank off. I will reroute the breather tube. If memory serves me right, my old GSXR had a tube to stop this from happening. My project tonight!! Thanks guys!!
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David Welch

[Robby]

If playing with the breather doesn't sort it, my next port of call would be a dodgy reg/rec. If it was a Honda I would jumped to reg/rec right away, not sure if the Bandit suffers from the same problems. Symptoms of running out of electricity feel exactly the same as running out of fuel.

[Bezzer]

[stinkwheel]

[Bezzer]

[Ariel Badger]

My first thought was blocked vent to the tank as well.
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Bikers make great organ donors, get 115 on your licence today.

[gavbriggs]

Check out the fuel and if it runs better with filler cap open then all fine. Also check the electrical plugs under the tank/headstock area. Mine had been stood a while and the plugs corrode. It can appear to be related to temperature but isn't and is just vibration/poor connection
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Recent bikes: Varadero 125 - Mod 2 3/2/14 - Bandit 1200 SK4