Question about 1981 Yamaha XS 400 Special

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Can't get aftermarket led turn signals to work on my 81 xs 400. Any way to bypass and make work?

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You will need to get a resistor for the lights as the Yamahas will not work/flash without the proper resistance in the bulbs. I had to stay stock on my XS650 for the same reason.

Posted on Mar 06, 2009


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Is this while the bike is running? If not, start it and see if they flash then. The old thermal flasher relays require more power to operate than newer electrical relays and won't function with just the battery, usually. If they still don't flash with the bike running, replace the flasher relay. Any automotive store will have something that should work, you don't have to go with an OEM part here. If you're feeling ambitious, you might replace the flasher bulbs with LEDs (I get mine from and go with an electric (or electronic, I forget how they designate them) flasher unit. Less draw on your charging system and brighter.

Jul 01, 2010 | 1980 Yamaha XS 400 Special

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I believe your aftermarket headlights have leds as your signal lights. They are now flashing faster because your electronic flasher module / unit is designed to measure current resistance to regulate the flash interval. As LED lights draw much less power than filament bulbs, the module thinks the lights are burnt out. Your hazards work on a timer to flash at intervals and does not work on the resistance.

You will need to replace the electronic flasher module / unit with one that is rated for LED. This unit should be under your dash near your steering column and will be labeled. The new one you replace it with should have LED stamped on it.

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Take both bikes to a commercial welding shop. Let them remove the "new" side stand and weld it in place. Ask that they reinforce the mount bracket in the process. You should wind up with a VERY strong side stand, better than new. Be sure to clean the weld, prime and paint it also. Rust is a bad thing.

Please rate this answer. Thanks :)

May 26, 2009 | 1981 Yamaha XS 400 Special

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