Question about 1979 Yamaha XS 500

1 Answer

The battery in my 1981 Yamaha xt 500 runs flat how do I check the magneto or charging system of the bike

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 20 Answers

You will have to get a digital volt meter,Harbor freight has them for $2.00, other stores like Sears, Radio Shack, any auto parts store will have them for various prices, you just need a cheap one that measures volts. Hook the positive lead up to the positive battery terminal, and the negative lead to the negative terminal, read your battery voltage should be from 11.90 volts to 12. 98 volts. Start the bike and measure the voltage while running, voltage should go up to 13.5 to 14.8 volts. If the voltage goes up the bike is charging, if it stays the same as when it isn't running the bike is not charging.

Posted on Aug 28, 2009

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

ginocussen
  • 216 Answers

SOURCE: Need Yamaha XT 500 Wiring diagram for pipe cart I,am building.

This is the best i can do, its the manual in photo form. You can enlarge using any photo editor.Good luck. Rate me if i've helped you. thanks.
http://www.carlsalter.com/download.asp?fileid=089097109097104097095088084053048048032115101114118105099101032109097110117097108032040105110032112104111116111103097112104032102111114109041046122105112

Posted on Mar 26, 2009

  • 1 Answer

SOURCE: 1981 Yamaha XS 850 triple tranny stuck, simple

Thanks to everyone responding, I think I'll walk way from this one, save me time money and frustration.

Posted on Jun 06, 2009

ollie reece
  • 1167 Answers

SOURCE: Yamaha xt 250 with no spark

no buddy you need 4 thing for a spark -magneto,cdi,coil,spark plug check the plug 1st replace this and get back to me

Posted on Sep 26, 2009

DoubleClutch
  • 376 Answers

SOURCE: 1981 Yamaha XJ750 Seca Trouble Starting it

Battery conections need to be checked even the ground wire.

Posted on Oct 01, 2009

  • 3567 Answers

SOURCE: how do i set cam position and timing on an old yamaha xt 500

You didn't say WHY the cam / valve timing needs to be reset. For some reason I get the feeling someone told you that resetting was needed and so you are asking how. Obviously, you may have installed new pistons and that is why the resetting is needed. In either event, when the cam timing is set the valve timing is also set. Other than adjusting valve lash, setting the cam sets the valve timing. Below is a web site where you can do a free download of a factory service manual. The process is not hard but having a manual will be more help and faster help than I can give online.
http://www.carlsalter.com/motorcycle-manuals.asp

Posted on May 27, 2010

Testimonial: "Thanks for your reply. I've been to the web site before and downloaded the manual already. It does not really cover the situation I have. There also seems to be a lack of compression with the bike. A friend has lent me a workshop manual so I will try that in the mean time. Thanks again "

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My xt 250 1981 model wont run proprely


Hi, Champion and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
totalmotorcycle com
1982 XT 250 won rev out dies if WOT Yamaha Dual Sport
Older XT250 Won Run Some Choke
bike dies suddenly Bike Problems XT225 250 Rider Group
Yamaha XT250 XT 250 Service Repair Workshop Manual Download Manuals...
OEM parts for Yamaha
Yamaha XT250 Owner Manual

Feb 17, 2014 | Yamaha Motorcycles

1 Answer

The bike cut out and then will not start again. it seems to be a problem with the electrics, when i turn the ignition nothing lights up on the digital display. i have charged the battery but still nothing...


Hi, Tom_f_03 before testing any electrical component in the Starter Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Check the 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.
4. Bank angle sensor needs a reset or is faulty.
5. FOB battery low or dead.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand or clutch pull in switch/sensor.
9. Security alarm needs a reset.
10. Starter relay, solenoid, starter have failed or circuit wiring faulty.
11. Starter armature or field coils have failed.
12. Main fuse or circuit breaker may be blown or faulty.
13. The electric starter is working but starter clutch has failed.
14. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Yamaha xt 125x Problem
Yamaha Xt 125 Wont Run
Yamaha XT 125R 2005 Service Information
OEM parts for Yamaha
YAMAHA XTZ 125K Owner Manual

Aug 05, 2011 | 2005 Yamaha XT 125 X

1 Answer

My Suzuki gsx400E -82 doesn't seem to charge the battery while running. With a fully charged battery (with a CTEK charger) The motorcykle starts perfektly, but after driving for about 1-1,5 hour the...


Sounds like the starter is dragging, when the bike gets hot the starter barely turns. And those bikes don't actually have an alternator. It's like a magneto system that keeps the battery from draining, but doesn't actually charge the battery. I would take the starter off and have it tested.

Jul 31, 2011 | 1981 Suzuki GSX 400 F

1 Answer

The screen display on my yamaha xt 125r is flashing when ignition off and bike won't start?


Hi, Jamie_fry200, it should be noted that the reasons your check engine light or CEL stays on constantly or flashes and your bike will or will not start and may turn over or not, these conditions will vary from bike to bike depending on the year, make, and model and you should always refer to your owners/service manual for proper diagnostic procedures. It should also be noted that any type of prior work done to the bike or an abnormal event occurrence IE: adding accessories, electrical curiosity/adventures, laying bike down/crashes, rainstorms/bike washings just before CEL light issues started can be significant hints/aids into tracking down the gremlin, also carry the appropriate jumper wire to access fault codes to reduce the risk of being stranded or towed also keep in mind that your CEL comes to life if anything, and I do mean anything isn't 100% with the ECM like parameter spikes. This means that you could be staring at a major repair, or your speedometer sensor is contaminated and needs to be cleaned.
And the usual suspects are:
1. Severely discharged or a damaged battery check the 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, you should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty charging system.
3. Faulty system sensor some models have up to 40 sensors
4. Faulty safety switches: run/off, ignition, clutch lever, neutral, side stand, tip over, fuel, and or their connections.
5. The engine got wet where it didn't like to get wet.
6. Faulty ignition circuit spark plugs, coils, cables etc.
7. Broken wire or worn insulation exposing wire to a ground situation especially inside wire harness at tight bends around fairing brackets, under dash panels, under fuel tanks over cylinder heads etc. Many harnesses are open on the ends that will allow water to enter and accumulate at v-bends.
Dielectric grease and contact cleaner are your best friends for wire/cable/harness connectors, look for corroded, broken, or loose pins/sockets.
For more information about your issue please visit the blue links below. Good luck and have a wonderful day.
Yamaha XT 125R 2005 Service Information
Harley Trouble Codes motorcycle sensor abbreviation list
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xt-owners-manuals
Yamaha XT 125 2006

Jun 04, 2011 | 2006 Yamaha XT 125 R

2 Answers

Should a 1976 ts185 have spark and run even if you have the battery out?


Hi,

Yes it should have spark, as long as the ignition switch is turned on. You will have to check the coil & magneto circuit if there is no spark.


Best wishes,
Graeme.

Mar 14, 2011 | 1981 Suzuki TS 185

1 Answer

I have a yamaha xt 125 r and every time i am flat out it dies


Hi, Broozer123 and the usual suspects are:
1. Inlet system air leak.
2. Enrichener valve not seated or leaking.
3. Damaged or restricted fuel tank vent system.
4. Restricted fuel supply tract.
5. Dirty or damaged air cleaner element.
6. Plugged bowl vent or overflow.
7. Worn or damaged needle or needle jet.
8. Vacuum piston assembly malfunction.
9. Loose or plugged main jets or passages.
10. Improper float level.
11. Accelerator pumps inoperative.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
derestricting XT125
Carburator Theory and Tuning
Yamaha XT 125R 2005 Service Information
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xt-owners-manuals

Jul 21, 2010 | 2005 Yamaha XT 125 R

1 Answer

XT 500, code for white paint on tank


Try the link below, it has a massive bike-alog, with all components and colours. Start with the English version and enter make, then model, if link is not already in the Yamaha section.
Cheers.

http://www.rsbikepaint.com/en/colours.php?makeid=110

Jul 21, 2010 | 1976 Yamaha XS 500

2 Answers

How do I replace the magneto, I am only getting 12 v. out of my battery, and when I disconnect the pos cable it dies, so the magneto must be gone.


First off that is not how you check your "charging system" not a magneto! on these bikes you have a Stator that is in the LH side cover on that engine and you need to check the windings for continuity and for short to ground. I would consult a local dealer for voltage output test spec's on the stator. next is the regulator rectifier, this can be tested with a meter and again consult your dealer.

when checking battery voltage while running it is common to have to bring the engine up to a higher speed than idle when testing the charging system, I would advise around 2500~2800 rpm and expect voltage to be 13.5~14.5 volts.

Jan 03, 2010 | 2003 Yamaha Royal Star Venture

3 Answers

Yamaha xt 250 with no spark


hi did you sort it as my 1981 yamaha xs 250 twin is not sparking but i dont now why

Sep 26, 2009 | 1981 Yamaha XS 400

1 Answer

Not getting fire to the coil.


The magneto is inside the right side case cover.. I think the lutch is on the left side.. You can tell by where the cable goes in. good luck

Jun 16, 2009 | 1985 Honda CX 500 B

Not finding what you are looking for?
1979 Yamaha XS 500 Logo

Related Topics:

499 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...