20 Most Recent 1980 Yamaha XS 650 G Questions & Answers


Hi, Ludwig if your headlight is not working, only one beam works, keeps burning out, blinking, or is dim the first thing you need to check is the headlight bulb for damaged filaments then check your light circuit fuse, then check your head light bulb socket ground wire for a clean tight connection, that being said the usual suspects are:
1. Faulty ground or power supply wire to headlight bulb socket.
2. Worn down solder contacts or loose fit of the bulb base in the socket due to vibration.
3. Worn, chaffed, or broken wires in the light circuit.
4. Corroded, broken, or loose pins/sockets in wire connectors.
5. Faulty hi/lo beam switch.
6. Faulty ignition switch.
7. Fuse is good but no continuity on both sides.
8. Faulty wiring between battery positive and headlight bulb socket.
9. Weak charging alternator/generator.
10. Faulty voltage regulator/rectifier ground or overcharging.
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.
Trouble shooting headlight Yamaha XS650 Forum
Headlight issue
Yamaha XS650SE Shop Manual
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http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

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1980 Yamaha XS... | Answered on Nov 15, 2016


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. 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.
1980 yamaha 850 special wiring diagram Google Search
http://xs850.minek.com/pdf/buletins/xs850g_tech_bull/850g_wiring.jpeg
http://biobug.org/motorcycle/xs850/Yamaha-XS70-XS850-Service-Manual.pdf
OEM parts for Yamaha
http://www.ringler.us/xs1100/otherbikes/yamaha/XS850/Yamaha_850G_Owners_Manual.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1980 Yamaha XS... | Answered on Nov 02, 2016


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. 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 XS850 XS750 Triple
Yamaha XS series
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OEM parts for Yamaha
Yamaha XS850G Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1980 Yamaha XS... | Answered on Oct 24, 2016


Hi Bh_upchurch, for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix or parts inquiry. If necessary transport your vehicle to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your issue. Good luck and have a nice day. 1980 Yamaha Motorcycle Service Repair Manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1980 Yamaha XS... | Answered on Oct 05, 2015


If it's after you charge it fully, and then start and ride the bike, either the bike is pulling way too much power, or you just need a new battery for the bike.

1980 Yamaha XS... | Answered on Feb 11, 2013


Does the motor turm over? First thing change All fluids chech tires for dry rot make sure brakes are not frozen lube and greases all fittings

1980 Yamaha XS... | Answered on Mar 03, 2012


I believe that the 1980 Xs650 still used points and condensers for ignition. I know that my 1979 did. I would check to see if you had a bad condenser. That can mess up the way that points are firing and can cause excessive carbon build-up. I'm not sure if the condensers are sold separately from a points set, but you can always buy a matched set and only install the condensers so you don't have to reset your points gap.
It might also be worth checking the voltage coming into the points assembly. These Yamahas are known for bad ground points, which can spike or drop voltage at points in the electrical harness. You might be getting odd output from the rectifier, which could be due to a bad rectifier or simply bad wiring connections. But my immediate inclination is to test or simply replace the points condenser(s).

1980 Yamaha XS... | Answered on Dec 14, 2011


Try this one......... (cut and paste into your address bar)

http://members.fortunecity.com/imlucky/E5.jpg

hope this helps

Tony

1980 Yamaha XS... | Answered on Sep 02, 2011


Yes I think there are some o rings that mount the inlet pipe into the carbs, and 30 years is a long time for a rubber to stay usable

1980 Yamaha XS... | Answered on Jul 28, 2011


I checked four possible sources and came up empty. Your best alternative is to Google motorcycle salvage yamaha

1980 Yamaha XS... | Answered on Jul 10, 2011


may be the rectifier or voltage regulater, use test meter to see what voltage is at the regulater

1980 Yamaha XS... | Answered on Jun 16, 2011


hello friend, it sounds like you have a direct short in your wiring. A hot touching ground somewhere as youve probably already figured. My suggestion is to get yourself a test light and although its time consuming, run down every wire in your harness starting with the lighting and horn wires. You have an older bike so you should probably remove all the bulbs one at a time and inspect the socketts for any rust or corrosion that could be causing a direct short. Also replace any wires that have become cracked and brittle. Some wires may look as though they are not exposed to shorting up against something but while in travel a mere bump in the road could cause a instant touch and short out your fuse. good luck.

1980 Yamaha XS... | Answered on Jun 16, 2011


I'm going to say look into the timing chain slack adjustment-some have a set screw adjuster, and occasionally the set screw has to be released so the adjuster spring can move,and then re-set the screw. The owners manual should detail this operation if required as it is normal maintenance.
If that's not it, I believe Yamaha utilizes a "overrun clutch" on the flywheel for the starter on this model, and it may be wearing out and engaging intermittently causing the chirping sound. These aren't difficult to rebuild if you have the factory repair manual and the correct flywheel puller. Good Luck!

1980 Yamaha XS... | Answered on Jun 08, 2011


Yamaha motorcycles of this vintage are notorious for having flaky electrical connections. Take a look at your fuse box. Do you still have the original fuse block, or has someone gradually (or all at once) replaced the stock fuse blocks with in-line fuses? I have owned a number of '78-82 Yamahas, and I've had to change out the fuse block on every single one of them.

While that might have some bearing on your tail light issue (have you checked with a voltmeter to make sure the bulb socket is getting power? Sometimes, there's enough corrosion in the socket to prevent good contact with the bulb), the more likely culprit is corrosion in one or more of the bullet connectors piecing your electrical harness together. In terms of troubleshooting, I would actually start with the ground side, as a poor ground gives exactly this type of flaky "sometimes on, sometimes off" performance.

Start with your brake bulb, rather than your tail light, because you know that power is at least sometimes getting to that socket. Find the black negative wire coming out of the socket. Even before you do any kind of wiring trace, clip a temporary ground wire onto that terminal of the bulb socket and a frame or engine bolt--or even right back to the negative terminal of the battery. There's not a lot of amperage being passed through this bulb, so you can use a thin, Radio Shack level jumper cable or simply make your own with two alligator clips and a length of insulated wire. At any rate, once you've grounded the bulb socket, try the brake switches again to see if the bulb now lights up reliably. There's a pretty good chance that it will. If that's the case, trace the black ground wire to each of its friction fit connections. Pull each connection apart, clean the connectors, and reseat everything. Continue until you've gotten all the way to the official ground. Or, if you get tired to this exercise, you can splice a fresh ground into the wire. As the wiring bundle has a common ground, this may actually help a number of components, not just your brake light or tail light.

If adding a good ground doesn't fix your intermittent bulb problem, you'll need to trace the positive side of things. Here, based on my experience with XS650s, I would suggest that you start tracing at the fuse block. I don't know what kind of metal Yamaha used, but those fuse blocks get brittle and don't always keep a good connection with the fuse or with the wires feeding into the fuse block, even if they look good in a visual inspection. Using the continuity function (or the volt meter function, with the negative cable clipped to ground), start tracing the wiring to each connection point, again pulling apart each connecting block to clean the connecting pins. Because Yamaha wraps all its wires into bundles, this will be frustrating work--it'll be easiest if you just start with testing each connecting block and checking from continuity from there. That way, you don't have to unwind any of the wrapping unless or until you find a bad link. Yamaha wires rarely shed their insulation; problems are almost always caused by tarnish at the connectors.

Good luck finding the bad connecting block, bad bulb socket, or bad ground that's keeping your lights from operating properly. The XS650 is a bulletproof bike that's great fun to ride. The electrical gremlins are a relatively minor problem in the grand scheme of things.

1980 Yamaha XS... | Answered on May 22, 2011


My bet is the 8mm studs also serve some other purpose, and therefore needed to be able to apply more force, evenly....Something below is the issue, and not likely the valve cover.

1980 Yamaha XS... | Answered on Mar 31, 2011


u mean what the gap is supposed to b set at???? then i would look up a site that is VERY good at what it does.... 650central.com......they have a number u can call too and ask them :)

1980 Yamaha XS... | Answered on Mar 31, 2011


Here is how you think of it: The solenoid is a switch, in terms of the wiring. One big cable in, from the battery needs to connect to one big going out. These two terminals are larger and have a different size fastener and washer, than "the smaller one(s).

So a solenoid is an electromagnetic switch that in normally open (not allowing current between the contacts).
WHEN you put a voltage to the smaller terminal, the magnet energizes, and contact is made between the two big terminals, stop the voltage to this small terminal and the switch opens.

So, some soleniods have two smaller terminals. The puropse of the 2nd smaller terminal is to allow more voltage to be directed to the coil, only during starter engaugement. The reason for this is voltage to the coil has to be reduced, during normal operation, but this would not be enough during starting.

So, like an analog clock face, most are oriented as follows. 12 o'clock position is battery cable heavy in, 6 o'clock position is heavy out to the starter, 2 o'clock position is switch energize, and 10 o'clock position is coil feed out (light).

I figure the battery cable and starter out wires are self evident, by size. IF you were to reverse the light two wires, nothing happens, and no damage, reverse to the correct position and off you go.

1980 Yamaha XS... | Answered on Mar 31, 2011


take ur carbs apart from the bottom an ckeck the floats at most u mite have to buy a carb kit an after u have to sync the two could be a weekend job

1980 Yamaha XS... | Answered on Mar 20, 2011


the bike cant handle the ethanol is the gas. clean your plug, and top of piston, if access to, And use stay-bill in you gas.Just so you know, its all engines. Just cause it runs fine now, over time it will cause problems. Run stay-bill in then all.

1980 Yamaha XS... | Answered on Mar 19, 2011


Go to the site below, there you will find an Owner's Manual for your model. It is a free download site for most Yamaha models, (yours is included) It is a pdf. file and is only 3.2Mb. There you will find the complete wiring harness and a multitude of electrical troubleshooting/maintenance sections and timing issues are fully addressed in step form.. Goodluck, cheers!

http://www.yamahaownershandbook.com.au/index.php

1980 Yamaha XS... | Answered on Oct 21, 2010

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