Lets Talk About The QT50 Headlight

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Lets Talk About The QT50 Headlight

Postby matt76 » Fri Jul 31, 2009 11:22 pm

original headlight 6v 20/20 watt, around $60 new from yamaha

i have four headlights that are dead. i cut the very back end of bulbs off and removed the insides of the bulb.

i read around the forums and i'm going to try a couple different conversions.

the bulb i really want to find is one of these http://shop.wemoto.com/pictures.dyn?k=HL-770422/10
but i can't find one in the states.

i found one of these https://www.lightbulbemporium.com/eiko_ ... a_3625.asp
but i can't find a base socket for it.

there is all kinds of different 6v. LEDs from http://www.superbrightleds.com/led_prods.htm
theres a lot of choices, anyone have any input on which one would be the best for my application?

i've also been thinking about just adding another small 12v battery to the back and just run all the lights including the headlight off 12v. i would just have to make sure i trickle charge the 12v when its not in use.

last question, but a good one. tell me there is some sort of device out there that you can splice in the loom to keep the brightness of the headlight consistent? i notice it more on the 79 than the later models.

if anyone else has any idea but hasn't tried, let me know, i'll try it for you.
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re: Lets Talk About The QT50 Headlight

Postby xrongor » Sun Aug 02, 2009 3:35 am

i've been using these for years with no problems:

http://dratv.stores.yahoo.net/c70replaceable.html

randy
"In this world there's two kinds of people... Those with loaded guns, and those who dig." -- Blondie to Tuco
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re: Lets Talk About The QT50 Headlight

Postby matt76 » Sun Aug 02, 2009 2:11 pm

good find randy, that helps.

i still want to try a couple other set ups too. driving at night needs to be a little brighter and safer for me.
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re: Lets Talk About The QT50 Headlight

Postby limes » Sat Aug 15, 2009 5:26 pm

I put a H3 halogen 12v bulb in mine and it seems to work well.
I cut out the metal on the back of the headlight and JB welded it in.
The 6v system doesn't light it as bright as an original bulb but it
probably wont ever burn it out either.
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Re: re: Lets Talk About The QT50 Headlight

Postby yellowsnow » Wed Sep 30, 2009 2:02 pm

xrongor wrote:i've been using these for years with no problems:

http://dratv.stores.yahoo.net/c70replaceable.html

randy


+1. This is still the best solution. It was a great find when Randy wrote about it years ago. :-) $2.99 replacement bulbs are easy to stomach.

Thanks Randy, I've used this setup all this summer with no problems whatsoever.
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Re: Lets Talk About The QT50 Headlight

Postby jayel » Thu Oct 01, 2009 6:24 pm

matt76 wrote:
last question, but a good one. tell me there is some sort of device out there that you can splice in the loom to keep the brightness of the headlight consistent? i notice it more on the 79 than the later models.

if anyone else has any idea but hasn't tried, let me know, i'll try it for you.
all you need is the voltage regulator (zener diode) off a 81 or later QT one wire tapped into the blue lighting feed wire
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re: Lets Talk About The QT50 Headlight

Postby xrongor » Mon Oct 19, 2009 3:15 pm

thx yellow snow. glad to see people are happy with the fix.

adding the voltage regulator is certainly a good idea. such a good idea that yamaha started adding it to the later models lol.

but it won't stop the 60$ stock bulb from failing if you ride on bumpy roads a lot. or the 2.99 bulbs in the light i suggest, but it is a lot cheaper.

btw thats a nice wiring diagram you got there. the one i have is a scan and its hard to read.

randy
"In this world there's two kinds of people... Those with loaded guns, and those who dig." -- Blondie to Tuco
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