DT125R FORUM

The connectors had to be chopped off most of it has been moved / altered
Battery is under seat as is regulator flasher relay an cdi
Ignition is mounted under the seat coming out of the side of the frame so there's not much original wiring left
All the wiring is hidden it goes from the rear light behind the mudguard under the seat along a tube on the frame an splits off left an right and goes into the headlight or through the bars to switchgear etc
I actually bought some terminal keys to depin the connectors
I noticed today the reason I ve got in a muddle with it is because the damaged loom I ve unravelled an mapped out on a board this loom is different to the one fitted to.the bike
So here's where I m up to
Blue from ignition is used to illuminate clocks is no longer needed
2 pin plug from cdi dark blue wire an light blue / white
This blue / white is neutral.light
I need to investigate were the other blue goes an also find the wires for oil sender

My loom is 1989 it's slightly different to rn don't quote me but I think the rn looms are around 1995 their identical to the 1989 but have a bunch extra wires for the square neutral relay
That's why I m getting confused because the wires tie into each other for example side stand switch from cdi is blue/ yellow but on the diagram your looking at it links up to the blue wire

Thanks for that
The writing has worn off my cdi I think it's 3nc
I ll have a look at the loom over the week end

Oil warning light is black / red
An the wire other side of bulb is brown if I remember correct

I don't think the light is for oil but when it meets the 2 pin plug going into.cdi the other wire coming off that plug is dark blue that I.mentioned earlier an that's. For neutral light
I don't understand what the light blue wire does although it goes to cdi an stator before going to.oil.sender

I m at work now will try to ad pics later
The light blue wire I mentioned look at the oil sender plug it has 3 wires one of then is the light blue if you follow it plugs into the cdi an branches of an goes to the stator / generator

@Calum
If I make an album on face book an right click copy image location can I post the image on here

Pin the valve then if it still does it you know its not the servo
The black an white wire ( kill switch to cdi ignition ) can cause it to.spark every other kick.but yours is getting to 5000 rpm so I doubt it's that
One thing to remember half the wires in these looms the copper has turned black even though they look OK on the outside

I ll do my best to describe it
Plug from generator has white. black.red/yellow.an PALE BLUE imagine an upside-down Y generator is at the top an cdi is at left on the right the same wire goes to.oil sender ( can I cut this bit out ? )
This plugs into a two pin plug at the cdi the other wire in the plug is dark blue this goes to.neutral.light ? It's the same colour blue as the clock illumination.wire but this is different wire

It's in a yamaha dragster so it's a two stroke chopper
The clock illumination is a blue wire it's kind of a bright blue
The other blue from cdi is a pale blue( similar to search bar below )
But there is another blue on that plug same colour as clock ilu wire
I have 3 looms one is fitt4d to the bike
One was a slightly later loom.that was damaged so I ve unravelled it for reference
An I have another uncut loom
The loom on the bike is completely butchered an things have been moved around regulator an flasher relay now live under the seat
How do I post photos on here

Because the engine is a different bike
I had to cut to the loom to route it through the frame an it's a tight fit
I m using a digital speedo
So the blue wire from ignition is now redundant an it has a big bulky connector on it
Thats assuming it won't effect anything else if its not connected ?
I ll put a pic later of the 2 pin plug with light an dark blue
I want to use the neutral light but I don't need oil light as running ore mix

On the 1989 loom there is a blue wire that goes from ignition to a shared connector that goes to switchgear an clock bulbs
I think the only purpose of this to illumination the clocks when the lights are on ?
Will it do any harm if its disconnected

Other thing I m stuck on is 2 pin plug from cdi goes to stator
Pale blue an dark blue wires
Pale blue goes to stator but splits in two an seems to go to oil sender ?
I m running premix can I cut the Pale blue wire out ?
The other wire in the same plug is dark blue I think this goes to neutral light ?
But as said above it seems strange as the wire next to is oil sender

i may be wrong
try taking the power valve out an cleaning it so you know its not sticking
then try running it with the valve pinned open
sounds like its not opening at the right time

@bird902 if your going to fit a digital speedo may aswel fit one that has temp gauge an tacho its good to keep an eye on whats going on inside your engine kosso make a nice digi speedo with temp gauge tavho an also built in warning lights

thanks hot shot
yes that was me on fb
so blue an yellow is for sidestand
i have a black with yellow stripe single bullet connector thats labelled as goes to red an white i think this is meant to go to the servo
i m not sure what code my cdi is dont think its 3nc

@SpookDog said in Missing some wires for the cdi:

@dan28

Does your bike run? If so what’s the problem?
Do you have a power valve servo fitted? The early 1988~1996 bikes have a servo with 3 wires (not 5) a single black with white (or yellow!) stripe wire and a twin connector with a black wire and a brown wire...

I have some spare wires in a box, how many do you need?
The dtr engine is in a different bike
I ve not tried to start it yet
The loom had to be chopped an lengthend
I ve wrote down that cdi black an yellow goes to red an white
An that blue an yellow from.cdi goes to black an yellow in the loom but that was ages ago an now I can't find either wire in the loom side

The engine an loom are 1989 the cdi is I believe 3nc the writing has worn off
To make it easier I ll list all the wires that the cdi has in case I got the code wrong

Right side of cdi
Male 2 pin plug
white/ red . Wire
Black . Wire
Female 2 pin plug
Green/ white Wire
Black an red wire
These plugs go to stator

Left side of cdi
2 pin plug
Dark blue wire
Light blue wire
This is for neutral an oil light

Twin Black wire from cdi goes to earth

Black / white from cdi goes to black / white in loom not sure what it's for ?

Orange wire from cdi goes to coil ?

Blue / yellow from cdi should go to Black/ yellow I can't find it in the loom ?

Black / yellow from cdi should go to.red an white possibly power valve?

@markus-w thanks
Brown is switched live though black is earth

@SpookDog if I m.reading it right the wire colour changes when it comes out the other side of the plug

i m getting confused looking at the wiring diagram one of the wires that goes to the bulb is blue what colour should the other wire be i know its either a brown or black but on the diagram the wires comimg out the plug are different colours

There is a small.two pin plug that plugs into the stator a blue wire comes off it an goes to the oil sender
If the oil sender is removed ( running premix ) do the wires on this plug have to be joined together does it stop the bike from starting ?