Sudirman disassembling front fairing.
Complete removal of ground electrode.
The result is quite surprising. Improved performance, easier starting, better low-end torque and the most obvious. smoother idling.
Video might follow... To be continued. :)
Update: On 24th Jan 2013, we tried to improve our test procedure.
Comparison between plugs. Notice there's more exposed spark area.
Installing and ready for test run.
Result: Somehow, after numerous test done, it's confirmed, that our previous result was a placebo. The engine suffers at both low and high-end curve. Main suspect is the increased spark gap distance. Need to redo this experiment.
Update: In 25th Jan 2013, being unsatisfied with previous result, we decided to make a better test rig, this time, with proper test procedure than before.
Three spark plugs and a feeler gauge on a Dremel like tool case.
Stock spark gap was about 0.5mm.
Using cutting tool to trim the ground electrode.
Result: Sadly, the test needs to be postponed, due to insufficient time and resources... Video still unedited.