| Even touring bikes sometimes benefit from revised spark timings. Only rarely will their carburetion be off enough to need attention, but the ignition advance they get represents a compromise between the optima for power and economy. For some riders, especially those who use a lot of throttle much of the time, stock ignition advance is too much advance. And of course many riders find that their specific requirements are better met with non-standard plug configurations.
The trick in all this is to know enough about spark plugs to be able to choose the right basic type, and to understand what the plug has to say about conditions inside your bike's engine. It's not an altogether easy trick to perform, with so many things to be remembered all at once; it's a terrifically effective trick when you get it right. |