The loggers only record from 11 to 23 seconds, depending on the model.
A way had to be figured out so the recording could begin when the vehicle was at full throttle, but imagine you are at the line, you stage and go to full throttle on the limiter, but your opponent hangs you out for 20 seconds. If the logger started recording when you went to full throttle, you could have the whole recording while you are on the start line, even if you backed off.
The loggers have a function called Record Inhibit so you can go to full throttle on the limiter or transbrake, but not start the recording.
The original MSD and new Dyna motorcycle ignitions have 12 volts from either the transbrake or clutch pedal switch to bring in the limiter. This 12 volts is wired into the logger and is now called the "Voltage Seeking Record Inhibit", so you can go to full throttle on the limiter or transbrake and not start the recording. It only starts when you launch by being on full throttle and either let go of the transbrake or drop the clutch. This is a launch condition. The wire goes into the logger RPM and Switch cable loom on pin 12.
But what about early Dyna and late model MSD ignitions. Some need earth to go on the two step/transbrake.
The FXL22, FXL32 and FXL35 have an "Earth Seeking Record Inhibit" line input for exactly that reason. It is Pin 10 of the RPM and Switch loom.
So there are two types of Record Inhibit, the original Voltage Seeking that works off a transbrake or two step and the newer version that works off an earth input. Both are fitted to the FXL22, FXL32 and FXL35, but you only wire in one. You cannot have both at the same time. You only need one.
The FXL12, FXL23 and FXL25 did not have the earth seeking record inhibit. They simply had an input that would indicate some switch was on, like a nitrous solenoid, but very few customers used this input, so it was decided to make that the Earth Seeking Record Inhibit line on all future models.
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23 December 2006