1984 225dx Ignition Issues

[vartz04]

Well I spent the whole day going thru the wiring harness. I got the whole starter circuit working. Push the button, the motor cranks. Pretty easy fix and I am very happy that it works now, no more yankin a rope.

Now to the issue that still hasn't been resolved. The motor still won't fire up. I have compression, spark, and fuel. So i figure It has to be something off with the ignition system. I started doing the tests in the clymer manual.

Test 1 - Pickup Coil Resistance - Lookin for 196 ohms +/- 10% - Reading = 193 Ohms. Good here

Test 2 - Charging Coil Resistance - lookin for 381 ohms +/- 10% - Reading = 891 Ohms - Not good

Test 3 - Ignition Coil Primary - lookin for .85 ohms +/- 10% - Reading 2 Ohms, Not worried about this.

Test 4 - Ignition Coil Secondary - Lookin for 5.9k ohms +/- 10% - Reading 0, however I am getting spark so this makes no sense as I am getting spark so it can't really be open. I am thinking my meter just wouldnt read it that high or something I am bringing home a different meter from work monday night to check this again.

So it appears my charging coil is shot, or at least not working properly. and I may need an ignition coil.

What I can't understand is that the motor won't fire at all even though I have spark, you would think with ether either straight into the plug hole or in the carb it would at least sputter a little bit. Any Ideas? also where would I get a new charging coil? would the yamaha dealer have this or am I more or less SOL on this?

[bcredneck]

i bet everything i own the charging stator has nothing to do with it not starting and do you have blue spark or orange spark if its orange you dont have the power to make a spark with comp try setting the plug gap super tight

[1984 honda 200s]

weak spark- stator coil. my 200s would not run at all, had compression, fuel, air wouldnt even kick. had very weak spark. everything checked out ok, only thing left was stator, turned out to be a leaking crank seal. changed all and now runs like new.

[vartz04]

ill have to check it out...the spark is blue. Ill have to check out the strator.

[bcredneck]

get a strobe timing light and check it if you have good spark gas and comp it must be timing or valve problems

[vartz04]

so i shouldn't be too worried about the charge coil reading too many ohms? (not the coil for the battery but the ignition charge coil)

I am going to hook up the timing light and pull the valve covers off and start going through that today then I guess. stinks cause my buddy just came home from school this weekend and we were going to go ride in this dusting of snow we got.

[vartz04]

adjusted the intake valve, it was a little snug, set it at .003 (specs read between .002-.004)
Put a timing light on it, its flashing right on when I am spinning it with the electric starter.

It has good compression Id end up lifting the front tire off the ground when I forgot to put the compression release on. I haven't tested it with a actual gauge but I really don't think that is my issue.

I am starting to think it is a fuel issue but that doesn't make any sense, it should at least sputter on ether the only thing I haven't tried here is to put a little bit of fuel right into the spark plug hole and then crank it. I think I have the parts from a pull starter lined up that I need to fix mine so Ill have that soon and be able to see if thats the issue but the electric start is spinning the motor with good power so i doubt it is that.

help me figure this out guys. Ive pulled junk out of peoples garbage and made it run, and this trike that is in very good shape ran like a top a week ago so Im turnin my hair grey tryin to figure this out.

[vartz04]

decided that the only variable is the electric starter, so put it in 4th gear behind the john deere and pulled it down the driveway...fired right up and ran like a champ....so explain to me why the electric starter (which is brand spankin new) wont make this puppy purr.

[Kevo225dx]

Keep us posted on this one. Mine fires right up with the pull rope but won't start with the electric start. Also, mine doesn't charge the battery (haven't done any trouble-shooting on the charging circuit yet).

[Texaskev]

Ok, this sounds like you have somehow got your start button tied into your kill switch circuit. I am not familiar with the yamaha harness, but the start button works off of a ground circuit. So does the kill switch. it sound like when you depress the start button, you are also making the circuit that grounds out the CDI. That would explain it pull starting, but not starting off when you use the starter. This also comes to mind when you state that you spent the whole day in the harness........might want to go back over the harness again.

[muthey]

there is another guy on here with a starting issue that boiled down to a hairline crack in his intake boot, that prevented him from running, he repaired it and it fired right up check your boot thoroughly and let us know from there

[Kevo225dx]

OK, it's coming back to me now...when I got my 225dx it would start on the rope but not with the electric starter. I replaced one of the coils inside the side cover (don't remember which one-sorry), and it will start with the electric starter now. Since mine doesn't charge the battery, I still have to use the rope. I kinda got sidetracked on trouble-shooting and haven't worked on it lately.

[vartz04]

The start button does not work off of a ground at least from what I can see on the wiring diagram. Basically a red wire comes into the ignition switch with power, this wire comes out as a brown wire, the brown wire brings power into the start button and power comes out of the start button with a red/white wire. That red and white wire runs back to the neutral switch relay (i jumppered this relay because the relay was shot) out of there it goes to the starter solenoid. That takes the power from the battery to the starter.

I don't see anything grounding anything out, the only thing that goes to the cdi is that red and white wire, and the ignition is firing fine with the electric starter it just won't start.

Ill have to check out the coils but I ordered the parts to fix my pull starter so Ill just use that til I get this figured out. I just want to ride the thing.

[Texaskev]

Like I said, I am not familiar with the Yamaha diagram. Usually the start buttom provides continuity for a ground to the solenoid, (on honda's at least) I guess the Yamaha does it with the hot wire...

[vartz04]

yep its with a hot wire, and the whole starting circuit works perfect, push the button starter cranks, and cranks good, it just doesn't start the motor. any other method of starting it it fires right up no problem.

Thats why I am at a loss on this one, The only thing I see that is not right is that charge coil is reading a high resistance. but the charging system works and keeps the battery at about 13 volts. Idk, this isn't helping my receeding hair line haha.

[trikes4life]

sound like one of the coils in stator not working properly

[vartz04]

does yamaha sell these or do i have to find one used?