pete59edsel

Check the stator, Standard : 50-250 ohm disconnect the black/red wire check the resistance from the black/red wire to the ground) ( disconnect 2 piece connector and check the resistance to the ground)

Ignition coils. Measure the resistance between the primary (low-tension) wire and ground or ground terminal. It should be very low. Like .5 to 1.5 Ohms. The primary wire is the small wire going to the CDI box or points. Next measure the secondary (high-tension) wire and ground. (Note that on most bikes these days, the coil mounting bar, that passes through the coil and mounts it to the frame, is the ground for the coil primary and secondary wires.) This should be quite high, like 6000 to 13000 ohms. If the coil is out side the specs given in the shop manual the coil might be bad. Sometimes, a coil will work OK when cool but fail when it warms up. Let them cool and they work again. Also check your battery itself....

Cheapest first remember....

1. Make sure the engine has the correct spark plugs and they’re gapped correctly. This might seem silly, but seemingly big problems are sometimes caused by the simplest thing. 2. Check the spark plug wire condition. 3. Disconnect the main electrical connector coming out of the engine, and then check for spark again. This unhooks the kill switch, ATV ignition switch and wiring for those switches. If the spark improves, the problem is within wiring from one of those switches or a switch itself is to blame. Now you’ll need to disconnect each switch (one at a time) to trace it to the failed part. 4. Test the stator resistance. You can get the specs from a dealer or try a search online. Dealers don’t accept returns on electrical parts, so be sure the part you order is to blame, you could be stuck with a brand new, expensive ignition part and still dont have spark. Think of your friends and riding partners who have the same or similar quad, you might be able to borrow parts from their machines to diagnose the problem.