Question about 2004 Yamaha Xv 250 Virago S

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Wont start started then stopped plenty of spark appears that no fuel is getting to the carburetor, the gas tank is full

Posted by Anonymous on


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Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2, TPS, ETP, IAC,or BAS).
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box if applicable.
17. Tilt sensor needs a reset.
18. Security system not disarming alarm needs a reset.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yamaha Vstar 250 won start need to diagnose and fix possible fuel battery...
OEM parts for Yamaha

Posted on Jul 01, 2016


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Posted on Jan 02, 2017

  • 99 Answers

SOURCE: Maybe a fuel problem.

check the float in carb and check the petcock

Posted on Jan 22, 2009

  • 948 Answers

SOURCE: fzr400 wont start on occasion

If the sidestand switch is acting up that would explain the lack of spark. Bypass the switch and see if your problem disappears.

Posted on Jun 25, 2009

  • 5 Answers

SOURCE: i have a 2002 426 has spark plenty of compresion

will it start if you spray a little carb cleaner in the cylinder.

Posted on Jul 13, 2010

  • 267 Answers

SOURCE: YZ 250 1995 2 stroke have spark,cleaned carby

If you have a good fat spark and timing is stock, with good compression, your problem is likely fuel/air mixture. Assuming you have good quality fresh fuel/oil. Set air mixture screw one and a half turns out. What is the condition of the reeds and reed holders. Is there a build-up of fuel/oil residue on the piston port skirts or the crankshaft? Check for absolute seal between carby and reed valve manifold. Check for obstructions through airbox inlet, filter and inlet to carby. Ensure the governor is not fouling. The site link below has exploded view diagrams for all components of the bike to see how it all works. Good luck, cheers.

Posted on Jul 16, 2010

  • 2019 Answers

SOURCE: hi i have a yamaha

Try some spray starting fluid.
That will prove whether or not the spark if ok.
Make sure there is gas in the carb.
The tank may be clogged or the carb float valve could be stuck.

Posted on Dec 20, 2010

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Is there gas in the tank? Sorry, but sometimes simple things escape us.

Also... is your fuel old? Does it maybe have a lot of water in it? Before you do anything else, try again with a full tank of fresh gasoline. THEN try the rest of this if it still won't stay running.

The problem you describe is VERY indicative of a fuel problem - no fuel getting to the carburetor, or not enough fuel getting into the cylinder from the carburetor. Try pulling the fuel line off the carburetor to see if fuel comes out quickly. If not, there's an obstruction in your tank.

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