Question about 1988 Yamaha XV 535 Virago DX

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Yam xv535 (1987) starts first time on choke, but will not run at all off choke. Maybe blocked pilot jet? it's been stood for 3 years but ran perfectly before. I've put in fresh petrol with loads of liquid carb-cleaner but it still cuts out as soon as you try to open the throttle. It's a BDS carb and where (I think) the pilot jet should be there's a rubber bung! - or am i looking in the wrong place? - exploded diagram could be clearer! Thanks for any suggestions, Chris in France.

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  • Yamaha Master
  • 40,843 Answers

Hi, Kris1353 if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly then stall, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and the battery needs to be replaced.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove, clean, and inspect fuel and vacuum lines and replace as necessary.
8. Replace spark plugs with new ones and check for spark.
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.
How to remove and reinstall virago carbs
Virago 535 Carburetor Cleaning Valve Adjustment part 1
Yamaha XV 535 DX Virago Service Manual
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2005/LIT-11626-18-21_1000.pdf

Posted on Jul 11, 2016

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: 2005 yamaha yzf 250-unstable idle

I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.

Posted on Mar 12, 2009

bennito10
  • 51 Answers

SOURCE: Vstar 650 classic. only will idle.

hello and welcome
this is a very very commom problem after the cycle has gone over a storage period of anything over a month or so. what has happened is the deteriorated fuel has plugged the idle jet, and possibley other jetting. this is verified by pulling out the choke allows it to run. because this makes of for the loss of fuel the jets are not produceing. so to fix this you will need to remove the carbs and take out the jets and clean them thoroughly with a carb cleaner and possibly a very small gauge wire to break up builup. especially in the pilot jet. unfortunately fuel added carb cleaners dont seem to work for this kind of problem and to fix right they should be disassembled and cleaned thoroughly. thank you.

Posted on Mar 22, 2009

rockitman187
  • 2559 Answers

SOURCE: 06' V-star 650 wont idle...

Take the carbs back off and clean the jet completely,This is a carb issue and that is what you should focus on.

Posted on May 19, 2009

  • 3567 Answers

SOURCE: Won't idle without choke

The pilot jet controls the air/gas fuel mix at idle . If the jet gets plugged up not enough gas gets to the emgine at idle. You will need to remove the carbs and float bowls and clean them, paying special attention to the pilot valve. Count the number of turns to remove the pilot screw and replace the same number of turns then turn counter clockwise 1/2 turn.

A “very helpful” rating for this answer? Thanks!

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Posted on Jun 30, 2009

wcv12ebutler
  • 1 Answer

SOURCE: TTR-125 Won't Start

unscrew the four screws on the bottom of the carb (be ready some gas will drain out) then you will see a goldish looking screw. unscrew it that is your jet

Posted on Jul 18, 2009

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Related Questions:

1 Answer

Bike will run but cuts out when you open the throttle.Have to use choke to get engine to run?


You sound like you have a blocked pilot jet in the carb and the using the choke to start it allows more fuel into the carb that would usually come from the pilot jet.
Remove carby float bowl and clean pilot jet

Mar 04, 2015 | Motorcycles

1 Answer

Fuel problems


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
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.
Re Bike will not idle with out choke Road Star Forum Yamaha Road Star
Oakys Garage Carb clean Pilot Jet clogged Won run without Choke Carbs 101
http://www.yamahaventure.nl/pdf/servicemanualxvz13tf.pdf
OEM parts for Yamaha
http://www.yamahaventure.nl/pdf/ownersmanualxvz13tf.pdf

Apr 23, 2014 | 2008 Yamaha Royal Star Venture

1 Answer

Thundercat won't run without full choke


is airbox and filter all good no leaks, could be blocked small jet in carb, will it run ok higher in rev range

Mar 09, 2013 | 1995 Yamaha FZR 600

1 Answer

Hi there i have a 2004 Yamaha YZF 250 that will run on choke then push the choke in as soon as u give it throttle its bogs an back fires then dies or u can build the revs it runs jst bout thanks


Would almost certainly be blocked pilot jet and pilot circuit a classic symptom of this is running only with choke on
buy new pilot jet an compress air clean the hole the pilot jet screws into
regards Jamie

Aug 28, 2011 | 2004 Yamaha YZ 250 F

1 Answer

I have a 1991 honda cbr 600, she'll start fine with the choke fully on. As she warms I let the choke off slightly and keep her at about 1,500rpm. Then she'll start steadily cutting out. It doesn't matter...


You didn't say whether the bike has been sitting (without being run) for any amount of time. If it has, I'd say that either your pilot jets are plugged, or you float needle is blocked/restricted; thus not allowing it to refill the carb bowls as fast as the fuel is being drawn from them by the engine. The later though usually only effects 1 maybe 2 carbs. Not usually all 4. the plugged pilots jets are more likely.
So how long has the bike sat without running? (And "It was running before I parked it" doesn't apply here) :-)
Good luck

Mar 11, 2011 | Honda CBR 600 F(1)H Motorcycles

1 Answer

2001 yz 250 starts right up but as soon as the choke gets shut down the bike won't idle and die's out . However will idle nicely with choke on.i'm lost with this.


Sounds like the pilot jet is blocked, or stale fuel. drain the caby bowl and fill with fresh fule.if it still does it you have blocked jets,More so if the fuel has been sitting in the carby for more than 3 weeks...Remove the carby and remove the main and pilot jet, the emulsion tube under the main jet clean them out make shur you can see light through them. reassemble and refit, try again

Jul 01, 2010 | Motorcycles

3 Answers

Went i star the bike i open the choke to warm the bike after a few sec close the shock the bike die runs only with the choke open what can be


This is a classic example of a clogged pilot jet in the carburetor. You need to clean the carburetor circuits and jets.

Jun 25, 2010 | Motorcycles

1 Answer

Wont run /idle


i'd start with removing the carbs and giving them a thorough cleaning as when bikes sit for so long, the carbs begin to get gummy/varnished from the old gas.

check for blocked holes in the pilot jet & main jet and look for "hard & dried up" gas in passages. be careful of the float bowl gasket as to not tear it or you will need a replacement.

Mar 03, 2009 | 1999 kawasaki ZR-7

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