1997 harley davidson flhtcui no spark

SOURCE: no spark

alrighty, I had the same issue with my bike. It took days of tracing the issue with a volt meter and I discovered an intermittent short that would "fry" my coi. This made the bike not start and when I replaced the coil, because I had removed the old coil and moved the wires the issue disappeared for a short time. It is known that SOMETIMES when the coil is mounted the two wiresthat go to the coil somhow get stretched. This over time cause an intermittent short and the coil is rendered "dead". The Fix: 1.get a replacement coil. 2.you need 6 inches of #18 wire 3. two aluminum wire splicers and two aluminum circle fittings for the coil posts. 4.take off the old coil. 5.cut back the wires that go to the coil about an inch. 6. using the aluminum splicers splice the wires making them about 3 inches longer. 7.splice in the aluminum circle fittings. 8.mount the new coil. 9. fire the bike up. Enjoy riding.

SOURCE: 1996 HARLEY DAVIDSON WON'T START CHECK BATTERY IS

Questions first.
Did this just happen out of the blue? Just didnt start one day?
You check your KILL switch first to see if it had power?
Any other saftey switches you havent checked?
Power from coil pickups? Please get back with me to see if I can further help.

SOURCE: 1999 police harley davidson rewired bike with new harnmess power

If you have power going to the coil but no spark, you've got something wrong with the "triggering" circuit of you ignition system.

One other thing, if your engine is the TC88 engine, (first year of production for some models) it probably has a "compression sensor" on it. If you have no compression, you will not have any spark. If you have your plugs out of the engine, you have no compression. So, screw a set of plugs into the engine, leave another set in the wires and grounded against the engine to test the spark.

The "triggering system" uses the signal from the ignition timing sensor that is located in the "nose cone" of the engine. Check this wiring from the ignition unit's "Black box" to the sensor. I seem to remember a plug that plugs in for this unit.

I'm afraid that this is about the only help I can give you with a stock ignition unit as I usually work with either earlier igniton systems or aftermarket units. I have very little experience with "stock" Harley units.

Mike Raatz

• 435 Answers
• Posted on May 31, 2010

SOURCE: harley davidson road king 2000 flhr

Don't ding me on this response, (it's happened to me) is the run switch turned off, it's the first switch on the right handlebar.
I'm assuming it was running prior to doing your maintenance.