Question about 2001 Suzuki DR-Z 250

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Please help I have a 1980's model susuki dr 250 the ignition spark got steadily worse until it now has none.I have checked the ht coil,pulse pick up coil,earthing wires,cut off switchand had the stator coils rewound and tried other cdi units.some guys say that the stator magnets can reverse polarity? or the pick up magnet in the flywheel?An original cdi costs more than I paid for the bike are there others? thanks dean

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I have a 83 DR 250 and i'm not getting enough voltage to create a spark, all I can suggest is that you check your battery and make sure its at full flavour. Check and see if you are getting any voltage prior to the ignition coil (should be 18-35v). If you suspect battery then try clutching it as the alternator moving faster might give you enough to get her going. Also check all your connections and earths. Earth wires are often overlooked and can cause you just as many problems as the actives. So give that a go and get back to me mate. Cheers

Posted on Jul 25, 2009

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The Stator Is AC Voltage Therefore Does Not Change Polarity. Is The Rectifier Separate From The CDI On This Old Of Model. The Rectifier Changes AC Voltage From Stator To DC Voltage For CDI.

Posted on Apr 11, 2013

  • Joe Stanton Apr 11, 2013

    Never Cut Wires In A Harness. CDIs Disable When Grounded.You Unplug Switches For Normal Open Cicuit . You Jumper Switches For Normal Closed Circuit. With A Butchered Harness You Dont Know Wh at You Got.

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The absence of spark or HT on the spark plugs is due to a failed IGNITION SYSTEM. Now this can be traced very easily. All you need is a 12 Volt park lamp, or a multimeter to check the voltage on the HT coil. you need 12 volt on the + side when the igntion is switched. if not check the fuse. Now on the other side of the coil you must have the voltage grounded ( switched by the igntion system) to produce the spark. If there is no spark the HT coil is a suspect. If not the ignition system is not switching and must be checked. failure of the electronic unit can be the reason , or lack of pulses from the pick up can be the other reason . You must be able to easily find this out by simulating the device to confirm, (feed a pulse) .

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I REMEMBER WORKING ON THE EARLY 80S MODEL CARS.I WOULD SCAN IT.IF YOU GET CODE 55 YOUR PCM FAULTY.IF YOU GET CODE 12 NO DISTRIBUTOR REFERENCE PULSES TO ECM OR PCM. POSSIBLE CAUSE OPEN IGNITION COIL OR BAD PICK UP COIL OR IGNITION MODULE.

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The pick-up coils fail sometimes but usually lead to a complete failure
Before just replacing parts u can eliminate some suspects ie kill switch,clutch switch & ignition switch by bridging
Also check that there isnt a spark jumping from an HT lead or plug cap

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1 Answer

Low voltage at coil on 1983 DR 250


Check for a short, or partially broken wire between CDI and coil. If your wiring is goodbetween there, check between CDI and pick up.

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Still no spark to plugs even after replacing coils.


Either your pulse generator does not give right pulses to the ECU or your ECU need replacement.Find the wires that travel from the pulse gen to the ECU to check them for pulse.

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