OK, back on track where I practice, there's also decrease turn radius, which I call it TURN X in pic below:
direction are indicate by black arrow, my plan to ride this turn is get to 1st turn point (red dot), and from there try to get the straightest line with consistent speed, and get ready for second turn point (also red dot). haven't try this plan yet as I haven't had a chance to go to track this few weeks, but would you guys think this will be best bet for this decrease turn?