Yamaha DT 125: No Spark Issue, Testing Pulser Operation with Meter & 0.33 Ohms Resistance

Question

hello I have a question about the yamaha dt 125 motor and so I was driving suddenly bach went out after taking it to the garage I stated that probably the impulse fell down how to check its operation with a meter I measured and had a resistance of 0.33 ohms but I do not know if this works

BANANvanDYK · Answer

What model code? Not necessarily the pulser had to go. Where and what did you measure?

chudy0321 · Answer

on the solder from the pulser and on the cables coming from it and shows 0.33 ohms I do not know if it is a little or a lot and as to the model, what is the model? yamaha from 2002 probably LC2

BANANvanDYK · Answer

Disconnect the pulser from the module and then measure. The pulsator is white-blue and white-red wires. It is impossible that there was a short circuit, I have not encountered such a case yet. By the way, check the resistance of the CDI power coil.
In DT125 from this period there were also 3RM emergency modules.

chudy0321 · Answer

yes, I measured it and it has 0.32 / 0.33 ohm

chudy0321 · Answer

and how to check the resistance of the CDI power coil and where is this what is in the picture?

BANANvanDYK · Answer

It is 0.33 k?, so 330 ohms, that's fine. Why only cut wires?
The power coil cables are led out of the stator and terminated with a two-pin plug. Black and red and green and white colors.
The second picture shows the voltage regulator.

chudy0321 · Answer

oh I'm not an electrician with measurements on the meter, it's just badly what I see from the Internet cables cut off because I replaced the pulser, where is the CDI resistance coil? what does BananVanDyk write? under the magnet?

chudy0321 · Answer

colleagues help this coil CDI is this coil what goes on candles?

I will give the link to the auction if it could break, it doesn't give a spark?
Is it worth buying the one from the Allegro or is it a Chinese fake?
http://allegro.pl/cewka-zaplonowa-yamaha-yp-majesty-125-150-i5045101354.html

chudy0321 · Answer

hello i replaced the ignition coil and there is still no spark what else can be checked

addam11 · Answer

Hello. I had a similar problem with the lack of a spark in dt125 x, at the beginning it disappeared until it completely disappeared: all measurements were checked and everything was ok. Jumper on the black and white cable (alarm), jumpers on the clutch and foot sensors, replaced module 1D0-00, checked cables and all plugs, search for a short to ground, checked ignition and ignition and starter on / off replacement of the coil, wire, spark plug, pipes proven hall sensor. A week of nerves, reading and searching, replacing the battery, no ideas and suddenly the perpetrator ....

tin soldering iron and everything works for me, even a trace of tin was not, maybe it will help someone, greetings.

BANANvanDYK · Answer

Being so lucky is like winning the lottery. Didn't the magnet wheel rub against the stator anymore? It really is rare for a solder to come off at two points simultaneously, from the solder tip and the wire end.

addam11 · Answer

I did not pay attention to the general rubbing of the colleague who checked the bike, he said that everything was stiff when it comes to the magnesium wheel. If it rubs, do I have to worry? any suggestions or diagnosis? I don't know anything about it, in fact, he starts his adventure with DT. In the photo it looks like something was scuffed, but strange that the orange spot would be rubbed and the blue spot would not. I don't know if it should look like this. After solid soldering, I must say that either I haven't been driving for a long time or she really got a kick. After the purchase, the bike flown without any reservations until the fault, but now I think it is even better.

Added after 3 [minutes]:

Should it be like this?

BANANvanDYK · Answer

When the magnet wheel starts rubbing against the stator, it will start to heat up, causing the winding to burn.
Abrasion may occur as a result of wear of the crankshaft bearings (excessive play) or the distension of the crankshaft (usually as a result of performing repairs to the engine contrary to art).

addam11 · Answer

Hello, however, this is not the end of my problem. The motor is hot when it is hot, where to look for the cause?

Yamaha DT 125: No Spark Issue, Testing Pulser Operation with Meter & 0.33 Ohms Resistance

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