Question about 1995 Yamaha Xv 250 Virago S

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XV250 poor idle and surging

My 1995 xv250 has been hard starting lately, it idles fine at start up with the choke on but once its warm it wants to die at idle and surges while riding. I tried keeping the choke on and it doesn't help.

Posted by Anonymous on

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  • Yamaha Master
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Hi, Anonymous 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.
Virago XV250 Choke and Idle Problem Premium fuel
surging 500rpm running rough at idle GL1500 Information Questions...
http://www.groussin.com/multi/XV250.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2005/LIT-11626-18-21_1000.pdf

Posted on Jul 01, 2016

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Engine dies after quad is warmed up (10-15 minutes)

Just a hunch, had this happen to a bike of mine years ago, could be the piston rings are gettting ready to go(wore down). What happens is when the quad is cold the rings expand tight into the cylinder walls allowing it to get full compression and run ok. When it heats up they shrink allowing the slightest amount of give which in turn will cause you problems similar to what your describing.

Posted on Jun 10, 2009

  • 69 Answers

SOURCE: Yr 2000 thundercat, won't idle unless choke fully on

First thing I would try is some sea foam, you can get it pretty much at any auto parts store...put it in the tank per instructions on the bottle, if the carbs are gummed/dirty... seafoam is you best hope at getting them clean without pulling them.

If sea foam doesnt work, you'll have to yank the carbs, but before you do... pull the tank, set it backwards where the seat was, get about a two foot fuel line (air line works just fine) run it ti the tank and start the bike, take a can of starting fluid (WD 40 works too but stinks when it starts to burn off afterwards) and spray around the base of the outside of the carbs where the boots connect it to the intake, if the engibe revs, you have a leak...cracked boot probably.

If no leaks are detected... then yank the carbs, pull the bowl covers and start cleaning....also, while you have them off pull the slide covers off and check the diaphrams on the needle for rips or cracks as well.

Check/clean.. put everything back together... if it still isnt running right then I have no other suggestions... certainly sounds like an air/fuel problem... if were anything else choking it wouldn't make it better.

Posted on Jul 10, 2009

czaa
  • 4514 Answers

SOURCE: Engine cuts out with clutch engaged.

is your bjke water cooled could have aproblem with that-its gettin hot-if air cooled carb may neede cleaning. the clutch is ok but indicates to me that that carb needs a low speed jet adjust also-do u have a clymer manual!!

Posted on Aug 04, 2009

mxtras
  • 194 Answers

SOURCE: Vstar 1100 idling rough and backfiring letting off the throttle

It sounds to me that your carbs might be a little gunked up - you mentioned the gas may have been old, so it's possible that the smaller (idle) jets are slightly plugged up. Fresh fuel might do the trick and/or you could try using a fuel system cleaner and water remover. This problem might 'solve itself' with a little time.

As far as the backfire - this might be either from the carb issue or it could be related to that rattle you mentioned - you could have a loose connection at or near the head - this can **** air and cause a backfire.

I hope this helped!

Posted on Jun 10, 2010

  • 1 Answer

SOURCE: Bike starts fine with the choke and will idle without it when warmed up. However, when I twist the throttle the engine dies. I have just had a bunch of work done with an independent shop, including ca

i have a 1996 883 roadster it fires up with the ckoke then cuts out after about ten seconds will start again but cuts out again after ten or so seconds any ideas

Posted on Aug 31, 2010

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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.
Virago XV250 Choke and Idle Problem Premium fuel
http://viragotech.com/newtech/Only%20starts%20idles%20on%20choke%20dies%20when%20you%20give%20it%20gas%20(SOLVED).htm
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2007 virago 250 idle fine w/choke idle fine no choke can very slowly raise rpm but while at stationary hi idle the rpm's flucuate from 300 rpm to 3000 rpm without touching gas when you give gas normal it...


Hi, Dma942 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.
Virago XV250 Choke and Idle Problem Premium fuel
Yamaha Virago 250 Idle Stall Issue
http://www.groussin.com/multi/XV250.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2005/LIT-11626-18-21_1000.pdf

May 23, 2010 | 2005 Yamaha Xv 250 Virago S

1 Answer

The engine on my 250 virago does not idle back


Hi, Atvnorton and the usual suspects are:
1. Throttle cables improperly adjusted or pinched.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
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.
http://www.xs11.com/forum/showthread.php?t=24258
http://www.thegsresources.com/_forum/showthread.php?224200-Answer-to-high-idle-when-warm-and-question-regarding-petcock
http://www.groussin.com/multi/XV250.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2005/LIT-11626-18-21_1000.pdf

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