Planet Minis

83turbo

i bought a 81 z50r with nothing from the stator plate out.awhile back i won a stator plate with electronics and flywheel off ebay. i installed them and no spark i thought no big deal so i pulled the stator plate and coil off my known good running 78 z50a and installed them still no spark. could a flywheel go bad? any suggestions thanks mike.

83turbo

is there a test process for no spark then?

Long Crapper

Could also be plug wire not getting good connection with spark plug cap. The wire usually screws into the cap, you can unscrew it. If it looks like loose connection just cut off a short piece "not too short so it doesn't reach spark plug" and screw it back in. Could be spark plug is have fould out and needs cleaning or replacement. Points could need cleaning or replacement. I used to file points with thin flat file and clean with cut up pieces of business cards with chemtool or acetone on them to clean dirt off after file and gaping.

mexicanyella

So you had no juice from the ignition you put on the motor initially, then took a known good ignition and presumably installed it without altering the points gap or cleanliness, and still no spark. One thought that occurs to me is in both cases, you were running the same wiring harness and coil. Of course it's possible you got some goop on the points of the known good ignition, or maybe altered their settings when you swapped over, but assuming you did not, I'd check your wires for breaks or shorts, and check your kill switch if you've got one hooked up (got a multimeter or test light?) and check your coil:

Lay a known good spark plug, in the plug wire, on the head as though you were going to do a spark test. Unplug your coil's primary wire. Find a source of 6V DC current--battery charger with 6V setting or a lantern battery--and hook the (-) terminal of the current source to the frame or engine and quickly brush the (+) terminal of the source against the coil's primary wire. This simulates the pulse of primary current from the points with subsequent interruption of the current. The interruption induces the secondary current from the coil to jump the plug gap. If your connections and coil and spark plug are good, you'll see a nice bright blue spark at the plug as you make/break contact on that (+) wire, and you'll know your coil is good.

If you have weak or no spark, double check your connections and plug again just in case, and if still no luck, you can probably assume your coil's bad.

83turbo

thanks guys i will try those tomorrow after work this thing is about to make me wave the flag and send it to the classifieds. thanks mike