Engine Timing - Page 1

Engine Timing

Several runs were done with the engine timed at various full advance settings (full advance on this engine appears to occur at 6k RPM. The advance is controlled electronically by the ignition computer, but may be modified via techniques described in K bike FAQs on timing). In the case of the runs, we also took a new 'control' run - which is Run016. This was felt necessary since conditions (temperature of the shop, temperature and diameter of the tire) may have changed by this time (we had done a significant number of runs and these runs were actually taken after the runs for mixture that follow.)

Figure 5, 30 degree vs. 24 degree timing

Parameters: Run014
Stock air filter with approx. 15k miles on it
Timing at 24 degrees full advance at 6k RPM (factory timing mark)
Sunoco Ultra, 94 octane
Parameters: Run016
Stock air filter with approx. 15k miles on it
Timing at 30 degrees full advance at 6k RPM (my timing mark)
Sunoco Ultra, 94 octane
Conclusion: The overall power increase from the additional 6 degrees of timing is worthwhile. I have not experienced any engine damage or noticed any pinging in over 15k miles of running the bike at the 30 degree full advance setting. This is a no-cost improvement for people who already use premium fuel in their bikes.

Forward to Engine Timing - Page 2
DynoMain