I have been looking at electronic ignitions and often see the claim made that following installation the engine runs smoother with less vibration. How true is this, or is just a sales pitch?
Timing lights are critical to the operation of any ignition system, but I have had trouble finding a good timing light lately and still use my 25 year old light that works great. You will probably have to buy one of the more expensive lights to get good results, but don't bother with the preset advance models as that is of limited use for the XS650 or most other motorcycle engines as the preset may not work properly.
It could be because very few people continue to use a timing light with their cars and we are always looking for the least expensive of anything, especially a timing light if used with an electronic ignition as you probably do not have to set or adjust the timing very often, if at all after initial installation.
The cheaper and less reliable lights will flicker and miss, especially at higher RPM's, but be patient. As long as you do not detect an actual miss, then the flickering is just the timing light.
The TCI and most other aftermarket electronic ignitions produce a positive voltage on one of the spark plug wires and a negative on the other. The timing light is designed to work best on the negative voltage wire, but it is not easy to determine which one is the negative wire, so if you are getting erratic operation or even failure to work at all, try switching to the other spark plug wire.
I have been looking at electronic ignitions and often see the claim made that following installation the engine runs smoother with less vibration. How true is this, or is just a sales pitch?