20 Most Recent 1979 Yamaha XS 500 - Page 3 Questions & Answers

Yes, if you have a V you have one

Located on the Right side of the bike, inside the upper frame rail.

Has a rubber covering that has UP stamped on it.

Supposed to shut the bike down if the angle of the bike is 65 degrees or more.



Yamaha... | Answered on Dec 18, 2020

Usually a badly adjusted clutch, warped clutch plates, or broken clutch springs. Too much drag in gear.

Yamaha... | Answered on Dec 15, 2020

In front of the lens you will see a white line @ the side rotate it counterclockwise then test the cam if it still out of timing rotate it clockwise then test if has little change adjust it till the timing is perfect.

Yamaha... | Answered on Dec 14, 2020

Request the wiring diagram from Yamaha.

Yamaha... | Answered on Dec 13, 2020

The stator is the alternator/ignition coil.

Yamaha... | Answered on Dec 12, 2020

Does the rev counter red the correct RPM I wonder.

Yamaha... | Answered on Dec 09, 2020

carb inlet needles are leaking... change your oil before you run it again

Yamaha... | Answered on Nov 19, 2020

Yamaha would be a possible source.

Yamaha... | Answered on Nov 15, 2020

Try the basics first. When was it given a Full service? (Spark plugs, air/oil/fuel filters and oil change. Have you got any warning lights on the dash? Has it been standing unused for a long time as sometimes a bad batch of fuel or old fuel can cause problems. Old fuel can go "Off" and leave a sticky varnish like coating clogging injectors and sticking valves.
Try this. When your fuel tank is down to about quarter full and the engine is cold add a bottle of injector cleaner to the tank. Start the bike and let it idle until it is up to working temperature. Don't 'rev it up' because at idle your getting a stronger mix of cleaner going through the injectors. Once she's warmed up take her out for a good long steady ride then fuel up on the way BACK home.
If this doesn't help you'll need to get a Good bike mechanic to look at it as it could be a worn engine part or an electronics issue.

Yamaha... | Answered on Nov 03, 2020

Order the manual from Yamaha.

Yamaha... | Answered on Nov 03, 2020

The battery voltage before running the engine should be about 12 volts. Use a voltmeter, and check the voltage at the battery. After the engine is started, the voltage should go to about 14 volts.

Yamaha... | Answered on Oct 25, 2020

You do not have to. Just close the petcock so no fuel can drain out when removing the tank and keep the tank upright when removing.

Yamaha... | Answered on Oct 25, 2020

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