1. Remove the spark plug and ground the base against the cylinder head (see Figure 1).  Operate the kick starter and look and listen for a healthy spark.  Rotate the engine at least 500 rpm to get a good spark.

2. If the spark is weak or no spark shows, repeat the test with a new plug.

3. If the spark is still faulty, remove the spark plug cap and check it for corrosion.  Install it on the plug and be sure the connection is goo Check the spark again.

4. If the spark is still faulty, remove the gas tank and check the high voltage coil for grounding.  Remove the coil and clean the frame mounting lug and bracket.  Use Loc-Tite on the bolt threads when installing.  Check the connectors on the blue and black wires for corrosion and install properly.  Check the spark again.

5. If the spark is still faulty, on ignition switch models, disconnect the blue wire on the back of the switch and hold it clear from contact.  Check the spark again.  If it's good, replace the ignition switch.

6. If the spark is still faulty, disconnect the blue and black wires from the coil.  Connect one lead of an ohmmeter to one coil terminal and the other lead to the other terminal (see Figure 2) . Read the meter, and then reverse the leads on the coil.  If either reading is below 16 ohms or above 38 ohms, replace the coil.

7. Connect one ohmmeter lead to the magneto stator blue wire (see Figure 3) and the other lead to the black wire.  Read the meter and reverse the leads.  On Stiletto, TT and DMR models, the readings should be no less than 9 nor more than 12 ohms.  On Pioneer and Plonker models, the readings should be no less than 17 nor more than 20 ohms.