Please help me diagnose--no spark...650 sj.

T

thunderball

Hi guys,

93 sj with stock box and using a light tester verified no spark, took ignition box off and inside is like new with not a drop of water or corrosion anywhere. Main fuse in the the little round o-ring sealed area is good with the same as batt voltage. I guess the coil is the one with the two plug wires coming out and the stator is the square box?nomenclature.

1) cut off ends of plug wires which were a little black and redid them with new clips that go on the plugs. No change.
b) checked continuouity by connecting the two barrel(or/bl)connectors and checked the plug wires.nothing. orange to the plug wire on that side and same for black. nothing.
2)engine ground is good with at batt voltage. Engine is shiny and with no corrosion.

I'm stumped.

thanx.
chris.
 
surferdude345

surferdude345

X-H
Location
Blacksburg for school
Like otis said - the start stop switch might have gone bad, to check it find the lead that comes out of the switch and there should be two connectors- i forget which one u take out but leave on pluged and the other unpluged. Try that i guess try both combos cause i cant remeber which one to pull.

Also check the grounds

If its not those two most likely its wires, coil or stator.
 
T

thunderball

Thanx for the ideas, I'll try the switch in the am but I would have thought if it was that it wouldn't crank or make any noise. Ya know, cuts off the juice?
Otherwise I guess I'll be hitting the local dealers for a coil and stator.

chris.
 
D-Roc

D-Roc

I forgot!
Location
Dirty River Rider
the stator is under the flywheel, don't rule it out until you test it. the black box is the cdi. disconnect the black and white connection from the start/stop switch to make sure that it isn't faulty.
 
S

sflsurfrider

disconnect the black and white wires that go to the stator. those are for your stop button (red and brown is start).

then try to start it. re-connect the black and white, if it starts, to shut it off.
 
Mouthfulloflake

Mouthfulloflake

ISJWTA member #2
Location
NW Arkansas
stick a meter set on AC voltage on the small wires ( orange and black) going to the coil, and crank it over, you should see some voltage there ( possibly LOTS like 300+)

if you have voltage going INTO the coil, you should have bigger voltage coming OUTOF the coil. ( If the coil is GOOD)

you can also set meter to resitance and measure from plug wire to plug wire.

I think you will find somewhere around 4000 ohms from plug wire to plug wire on a good coil.
 
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S

sflsurfrider

Mouthfulloflake said:
stick a meter set on AC voltage on the small wires ( orange and black) going to the coil, and crank it over, you should see some voltage there ( possibly LOTS like 300+)

if you have voltage going INTO the coil, you should have bigger voltage coming OUTOF the coil.

you can also set meter to resitance and measure from plug wire to plug wire.

I think you will find somewhere around 4000 ohms from plug wire to plug wire on a good coil.
Click to expand...

but dont try to check voltage on the secondary side of the coil. :lightning:
 
T

thunderball

Thanx for the suggestions, I'm still messing with it and leaning towards cdi.

unplugged bl/w plug for start stop with no change

plug wire to plug wire is 4.3k ohms=good?

orange and black unplugged with voltmeter on ac measures 1.7 volts when cranking.

Also checking resistance on the cdi two of the readings were waaay off, like open circuit.
white to white w/red and whit w/red to pink

thanx,
chris.
 
Mouthfulloflake

Mouthfulloflake

ISJWTA member #2
Location
NW Arkansas
the orange and blk seem low to me, but im going from memory.

is your battery fully charged ? ( 12.6V or more)?

what ignition? stock?

are you sure you dont have water/oil in your front cover?

1.7 volts is NOT enough to make your coil do its thing.. you have a bad meter read, or faulty wiring, or maybe the CDI is bad..or stator windings?

if its a stock CDI, I will send you one to test with( deposit required because the last mofo asshat I loaned a part to stole it)

or

open it up, clean it up, trace it back to the start.








thunderball said:
Thanx for the suggestions, I'm still messing with it and leaning towards cdi.

unplugged bl/w plug for start stop with no change

plug wire to plug wire is 4.3k ohms=good?

orange and black unplugged with voltmeter on ac measures 1.7 volts when cranking.

Also checking resistance on the cdi two of the readings were waaay off, like open circuit.
white to white w/red and whit w/red to pink

thanx,
chris.
Click to expand...
 
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T

thunderball

Thanx for the tips, I try not to be an asshat too often so a dep. is no problem. Shoot me an email chriscbai@aol.com.

Batt is well charged.

It is the stock ignition.

The igniton box is all apart(which I think is what you meant as the cdi is solid state) and is clean with no water intrusion or corrosion.

There was no water or oil in the front cover and had a good gasket.

If you have a spare stator I wouldn't mind that as well if not just to compare readings.

thanx.
chris.
 
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