Question about 2007 Yamaha V Star 1300

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2007 V Star 1300 spark plugs fouled runs fine at idle but when I try to excelerate it tend to bog down and have to throttle up to keep running. When I bring down to normal coast speed it surges but wo

Spark plugs keep fouling. When leaving a light I throttle up and it wants to die so I have to over throttle to keep running. When I get to speed and coast it surges. But will idle at the light the bike is stock no add ons. The valves are adjusted to spec and sound good just nt sure of this one.

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  • Yamaha Master
  • 39,978 Answers

Hi, Brian and the usual suspects are:
1. Extremely lean fuel mixture.
2. Dirt, rust, water, or ethanol sludge in the fuel system.
3. Sticky throttle cables.
4. Multiple carburetors not in synchronization.
5. TPS sensor out of adjustment or faulty.
6. Wrong spark plugs for the type of service.
7. Throttle bodies not in synchronization (FI)
8. Faulty O2 sensor.
9. Clogged, stuck, or faulty IAC valve.
10. Aftermarket components not compatible with ECM.
For more information about your issue and valuable "FREE" downloads that you will need please click on the websites below. Good luck and have a nice day.
Spark Plugs Fact and Fiction Car Craft Magazine
Spark plugs running hot
Yamaha XVS1300A 2007 Service Manual
OEM parts for Yamaha
Yamaha 2007 XVS1300AW Owner Manual

Posted on Feb 05, 2017

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 46 Answers

SOURCE: spark keeps fouling but no clue why

Are you losing gear oil.
When the crankshaft seal leaks, oil from the gearbox is sucked into the crankcase, and this can foul the plug.
Also check the plug gap, most guys set the gap too small. It should be 0,7mmto 0,8mm. The plug should be a B9 EG, or equivilant.
Now, you can also change the plug cap to a type that has a built in resistor, this also helps with plug life.
Note that 2 strokes use plugs way more than 4 strokes, and you should replace the plug every 15-20 hours to keep your riding pleasant.
Good Bike you have there
Cheers
Jon

Posted on Feb 16, 2009

  • 3567 Answers

SOURCE: bike bogged down like plug fouled now wont start

Based on the information given, I think you may have a hole in the top of the piston. It sounds like pre-ignition, ( AKA detonation and engine knock ). Pull the cylinder head and check the piston and cylinder head. Sometimes the top outer edge of the piston disintegrates due to the heat. Replace the piston and rings and remove the carbon from the head. Be sure you run 32/1 mix on gas and oil. That's 4oz two stroke oil per gallon of gas. Only use premium gas.

Remove and clean the carb. Be sure the carb mount bolts and carb manifold bolts are tight. An air leak will cause the engine to run hot.

Please rate this solution. Thanks

Posted on Apr 07, 2009

wd4ity
  • 4565 Answers

SOURCE: when my 883 warms up it fouls out the spark plugs,

Is your 883 fouling plugs AS if warms up or AFTER it warms up? The enricher circuit is designed to be extremely rich in order to start a cold engine. If you allow you engine to "warm up" with the enricher on the entire time during warm up, plug fouling is typical. You should use the enricher to start the engine but disengage it as soon as you can keep the engine running with the throttle. Use the enricher just as little as possible.

If your plugs are fouling AFTER warmup and while riding, your carburator is jetted too rich or your air filter is in need of servicing.

Posted on Sep 28, 2009

  • 8404 Answers

SOURCE: what causes plark plugs to foul,they keep turning

Plugs foul for a couple reasons, engine in poor condition (worn rings - poor compression), wrong oil, wrong plugs, bad riding conditions, cheap fuel, out of tune, carb out of tune.

You are not mixing your fuel with oil are you?

You might need a carb tune up (Id start by adding some injector cleaner to the fuel according to the bottle instructions.

You might put a hotter plug in your engine, one or two range increase.

If you will go to a good auto parts store, they will probably have a chart of assorted plug conditions and their cause. The counter man may be able to make a recommendation to you.

Posted on Oct 18, 2009

  • 3567 Answers

SOURCE: What is the stock gas oil mix?

The standard mix is 4 ounces of two stroke engine oil per gallon of gas.

Posted on Feb 08, 2010

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I've recently had a problem with getting my bike started, i have managed to get it to start now, but it can only be started with the choke fully open and if i try to close the choke it cuts out. (Even when...


It is most likely fouled spark plugs. You can take them out and sand blast them, or buy new ones.
I had a CBR 954, and noticed that the spark plugs fouled out pretty easily because it runs so rich at startup (and I would shut it down during the 'warm up' phase).
Here is some more information for you:
From http://answers.yahoo.com/question/index?qid=20080806081249AALKibM
What are signs or symptoms that spark plugs in a motorcycle need to be changed?
There are several things that could hint at bad plugs.

- Hard starting.
- Slight to severe hesitation when you give the bike some throttle.
- Stalling, especially when you give the throttle a good twist
- uneven idling (tends to zoom up, or down, or sputters)
- After running the bike for a little bit, take out one of the plugs. If the end of the plug is wet, its not firing, and it could be oil fouling the plug
- take a look at the color of the end of the plug -- if it is white, its running too hot, and it can cause misfires
- look at the same area, and if it is covered in black soot, it can be poor gas mixture and dirt in your tank causing it to foul
Hope this helps.

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When my 883 warms up it fouls out the spark plugs, as if it is getting to much gas, when I go to accelorate it backfires and bogs down. At idle it runs fine.


Is your 883 fouling plugs AS if warms up or AFTER it warms up? The enricher circuit is designed to be extremely rich in order to start a cold engine. If you allow you engine to "warm up" with the enricher on the entire time during warm up, plug fouling is typical. You should use the enricher to start the engine but disengage it as soon as you can keep the engine running with the throttle. Use the enricher just as little as possible.

If your plugs are fouling AFTER warmup and while riding, your carburator is jetted too rich or your air filter is in need of servicing.

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Start with the spark plug it is the easiest.

But sounds like the carbourator is dirty, Probably fouled with old gas varnish. When it is idling give it a little throttle, flip the choke on and then full throttle. If it goes full throttle and doesn't conk out, it is a fuel issue.

Good Luck

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