Mazuma quad no spark

coil you can test if you have a coil tester but doubt you do. CDI cant be tested. could also be a pick up coil on the stator, ignition switch, kill switch, tether if it has one.

coil, kill switch has grounded itself, pickup coil gone bad, etc. grab a multimeter, a service manual and start testing things.

Probably the ECM, if you have a good, charged battery, spark plug, wiring is not damaged, and kill switches are in "run".

If you have replaced the spark plug then the possibilities are the ignition coil is weak or the starter mechanism is faulty.

See this site for details of parts.
Mini Atv Quad Parts 47cc 49cc Stock Replacement

Check...
Battery
Points
Coil
Magneto
Ignition switch
Kill switch
Neutral safety switch

you might have to check the magneto behind the flywheel

I assume that is a 100cc, 2 stroke ATV? If the starter motor is spinning, and you just don't have any spark. First, replace the spark plug. If that doesn't fix it, then you may have one of the following problems: Bad CDI, Kill Switch or Rip Cord Shut off switch, Frayed wire shorting out, cracked/damaged spark plug cap, bad coil or coil wire, bad stator. My bet is on the kill switch and/or Lanyard/Rip Cord shut off switch or the CDI. You can bypass your shutoff switches to see if they are the problem by either disconnecting the wires or connecting them together(depending on the type of system you have). CDI's routinely fail on small engines and generally cost about $20-$70, depending on the style. www.solanocycle.com

test all connections,for strength by bending them

I'm not familiar with all quads and all the kill switch locations. Does it have a tip-over kill switch? Is it working? Is the quad in neutral? Is the neutral light on? Many engines will not spark if the neutral light is not on. Are the headlights off when starting?

How good is your battery? A low battery can kill spark. Test for spark by grounding the threads of the plug against the cylinder. Have a friend kick the bike while you watch for spark. Assuming no spark, then check all the kill switches with an Ohmmeter to be sure each switch is working properly. Sometimes a switch goes bad. Try disconnecting all kill switches then check spark.

Check the wiring harness, even under the gas tank and seat. Are all the connectors clean and with a tight connection? Any abraded wires? Check the ignition switch also. The switch can go bad as well. Are the flywheel coils good > is the battery getting a charge?

Still no spark? If CDI then get it checked.
If points then file or replace them along with a new condensor and reset the gap then time the engine. >> I hope this helps.

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