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completely unrelated electronical question (need help)


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#1 diymirage

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Posted 08 March 2012 - 02:01 AM

hey guys
i know very little about electronics and i thought someone on here might be able to help me with this

i have a street legal bike with a less then adaqaute electrical system
the stator only puts out about 35 watts of AC power

by the time i run a head and taillight there isnt much left for accesories

i added LED turnsignals but none of the conventional flasher work on them
i can flick the switch and they turn on but i can not get them to flash


is there a simple way to make them flash?

its a 12 volt AC system

thanks guys

#2 steamboy

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Posted 08 March 2012 - 02:58 AM

my buddy had same problem on his CB 550 cafe bike. Check-out some bike forums, LOTS of guys have posted on this...

#3 vintagestang

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Posted 08 March 2012 - 03:17 AM

If they are meant to stay on and not flash mostly no unless you want to get into a big conversion project. If they are meant to flash see if any of the wires are in the wrong place or loose or if you need a stronger power system. What brand and model number are they?

Edited by vintagestang, 08 March 2012 - 03:20 AM.


#4 Psychographic

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Posted 08 March 2012 - 03:44 AM

From what I understand LED's don't draw enough power to make the blinker work. There is a part(s) you can add to draw more power and make the blinkers work. I'm sure with a little searching you can find what you need to fix your problem or you can swap out the Mechanical blinker with an electronic one.

http://www.cyclegear...elay/web1006869

Edited by Psychographic, 08 March 2012 - 03:48 AM.


#5 monkeyclaw

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Posted 08 March 2012 - 04:36 AM

You need to add "ballast" kits when installing LED kits on your bike....Dealt with this early on with LED lights on my Road-glide; The ballast will make up the draw difference and allow the winkers to work as intended....depending on the popularity of the bike; you may also be able to install a more powerful stator; I also had to do this on the road glide to support the 1000 watts of stereo I installed on the bike....Not easy to keep a sub-woofer powered on two wheels..................Matt

#6 moparmagiclives

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Posted 08 March 2012 - 05:02 AM

Go to a good parts store that offers motorcycle pars an see if the have a "no load" flasher to run the LEDs.

#7 diymirage

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Posted 08 March 2012 - 01:11 PM

thanks for all the info guys


the entire turn signal set-up is aftermarket and pieced together...not sure what the numbers on anything is

i think i tried a "no-load" flasher but it didnt work on my AC system

#8 DiamondJoeQuimby

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Posted 08 March 2012 - 06:16 PM

You need a load resistor for the LEDs to flash or get an automotive base led bulb w/ the resistor built in for a std flasher circuit. Here is a link from superbrightleds.com for their flashing LEDs and load resistors. Hope that helps. Cheers

http://www.superbrig...CFSHatgodoCa3eA

edit, just read that it is an AC system. Sorry. Disregard. Only think I can think is to get a power inverter, then transformer. Or just convert to a DC system :)

Edited by DiamondJoeQuimby, 08 March 2012 - 06:18 PM.


#9 moparmagiclives

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Posted 08 March 2012 - 09:02 PM

built in for a std flasher


That's a whole different problem right there buddy lol :)

#10 FASTBACK340

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Posted 09 March 2012 - 12:41 AM

I did the LED upgrade in one of my cars and I had to use an electronic flasher relay instead of the the standard piece. You never mentioned the year or model of bike, but I would start there.... And you can't mix & match LED's in the rear and a bulb up front. Never work right.

#11 diymirage

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Posted 09 March 2012 - 01:54 AM

thanks for the replies guys

Adam, i actually tried a set-up with a rectifier which turned the system into a DC system but because of the way it works it pretty much cut my power output in half and im allready taxing the system with a head and tail light as it is

John, i tried the electronic flasher aswell, it doesnt work on AC.
im running LEDs on all 4 corners, so that shouldnt be the problem
and the bike is a 96 kawasaki KDX

#12 MikeMc

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Posted 09 March 2012 - 01:18 PM

convert all lights to LEDs and use the bridge rectifier....are you sure the headlight is an AC bulb ?....the base / socket type should tell you

Edited by MikeMc, 09 March 2012 - 01:18 PM.


#13 diymirage

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Posted 09 March 2012 - 02:16 PM

i tried that Mike, the headlight went way to dim and so did the tail
i tried running LEDs for the front and taillights but they just didnt last with the vibrations of a dirtbike

im not 100% sure if the headlight is a AC specific bulb but i AM sure its a filament type bulb and the system is AC

#14 Patrick2005

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Posted 10 March 2012 - 06:10 AM

Normally a ballast resistor would correct this problem. I know a lot of the time if you put LED bulbs in cars they will either blink way to fast or not at all. But then again that is a DC system so I'm not sure. I know car electronics more than bikes.

#15 diymirage

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Posted 10 March 2012 - 06:14 AM

yeah, if i could get them to blink too fast id be halfway there, but they just dont blink at all
i can run them on if i leave the flasher out of the system or leave the flasher installed and they dont come on at all


i was hoping someone could give me an idea on a resistor or some type of electrical doohicky that would work as a flasher, interupt the flow of current to make them flash