Question about 1981 Suzuki GS 750 L

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How do i test cdi

NO SPARK AT CYL.2 AND 3

Posted by Anonymous on

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Swap your coils with the cylinders that do have spark. if it changes then you have a bad coil(s). generally cant test cdi's. It's a "replace with known good part" kinda test.

Posted on Apr 30, 2014

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I have 1990 suzuki gsx 600f with no spark but does crank i have tried cdi box as i have 2 of the same bikes plugs seem fine checked all the wiring i don't know what it could be


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Testing your motorcycles Ignition Pickups
How to test motorcycle CDI box ignition coil
How to diagnose no spark situation on motorcycle
http://tinymicros.com/mediawiki/images/e/e3/Suzuki_GSX600F_Service_Manual.pdf
OEM parts for Suzuki
http://mybikemanuals.com/suzuki/suzuki-gsx-owners-manuals


Oct 06, 2016 | 1990 Suzuki GSX 600 F (Katana)

3 Answers

Only running on rear cylinder


You are Not getting spark to ur front cylinder. Swap your spark plug, if not then replace your front plug wire. if this is still not the problem ad you are sure the coil is good then look into the wire that gives the coil signal to fire

Apr 22, 2014 | 1985 Honda VT 500 C Shadow

1 Answer

How to test my performance cdi its not starting my scooter


The easiest way is to try a known good CDI. If it starts with that and not with the performance CDI, the performance CDI is bad or incompatible with your scooter. You can also test for spark. If you have spark the CDI may not be the issue.

Nov 08, 2013 | Motorcycles

1 Answer

Gp 800 will crank but wont start


Hi, most likely the trigger coils near the flywheel, it will still have spark but the timing may be off. Try new plugs first as they may have spark outside the cylinders but not when under compression. Regards Phil

Jul 01, 2012 | Yamaha Boating

1 Answer

Eng. breaks down when hot like a cyl cuts out. Could this be a coil module breaking down when hot . The bike other then this runs fine


You need need to check the pulsar pick up ( like points for a cdi style ignition) , the coils,and the spark plug caps. If any of these are bad replace them. If all test good then your problem is a bad cdi box.

Jun 01, 2010 | 1984 Honda VT 500 C Shadow

1 Answer

94 fzr 600. no spark to cyl 2 and 3 i swapped the wires to from 1 and 4 see if it was the coil and the 2 and 3 sparked fine further ive tried to wire directly from the cdi to the coil with my own wires...


Hi, James8026 and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
6. Faulty ignition coil or ignition / electronic module
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals
OEM parts for Yamaha
https://www.tradebit.com/filedetail.php/2864660-yamaha-fzr-600-service-repair-manual-pdf
Pickup Coil for 1995 FZR 600 No Spark The FZR Forum
View topic FZR 600 no spark

May 19, 2010 | 1994 Yamaha FZR 600

1 Answer

Low spark on one spark plug


Sounds like you need new wires.....but the cdi box could be working only on one cyl. also........I would try new wires first.....

Dec 29, 2009 | Polaris New Genuine Polaris Snowmobile...

1 Answer

My 1981 Suzuki GS1000G has no spark on 3 of the 4 cylinders


cdi unit get the manufacturers to test the cdi out and get back to me

Sep 28, 2009 | 1981 Suzuki GS 750 L

1 Answer

No spark on Hyusu


Hi and welcome to FixYa,

For a "no spark" problem with a Hyosung RX125, check:
  • temporarily disconnect the battery. With the engine on at both the ignition switch and engine kill switch, verify that the green wire to the CDI does not measure 0 ohms to ground;
  • if it does, check the ignition switch and the engine kill switch;
  • it it measures anywhere between 50 ~ 500 ohms, then reconnect the battery and check that there is +12 on the orange wire going to the CDI with ignition switch on;
  • for a pulsating voltage (high ACV) at the white / blue wire coming from the CDI going to the ignition coil;
  • for a pulsating voltage (low ACV, 0.5VAC) at the green wire coming from the pulser coil going to the CDI; and
  • of course, check if the CDI (black / white) is connected to the ground.
Postback results of tests.

Good luck and thank you for using FixYa.

May 27, 2009 | 2001 Hyosung RX 125

1 Answer

Gsxr 750 no spark how do i test cdi


I've this data from my 1986 engine!

Under the left hand side cover there are 2 2-wire connections. One with a green and a black wire, one with a blue and a yellow wire.
Use an ohmmeter at R x 100 between both wires of a connector to check the pick-up coils: resistance must be between 130 and 180 Ohms.

The values of the ignition coil resistances are:
primary coil : 3-5ohms ( set ohmmeter at R x 1 )
Secundary coil : 25.000 - 45.000 ohms ( set ohmmeter at R x 1.000 )
For a correct measurement ALL leads must be disconnected ( also the spark plug leads )

The CDI cannot be tested with a simple measurement. Suzuki dealers have a special tool to test CDI boxes.
But checking the pick-up coils and ignition coils good will indicate an defective CDI.

The wires on the CDI:
Blue: PU coil 1 ( cyl 1-4 )
Yellow: PU coil 1
Green: PU coil 2 ( cyl 2-3 )
Blue : PU coil 2
Orange/white : +12v ign coil 1-4
White : switched coil negative side ign coil 1-4
Orange/white : +12v ign coil 2-3
Blue/yellow: switched coil negative side ign coil 1-4 ( and signal to tachometer )
Blue/white : ground

Thus, you must have +12V on both Orange/white leads.

Mar 15, 2009 | 1992 Suzuki GSX-R 750 WN

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