i did the timing advance this weekend. i forgot my didital camera though and my flip phone camera wouldnt take good enough pics.
but i will say that +4 timing REALLY wakes up the bottom end. like wow, every banshee should come like that from the factory. to give you an idea of what it did for the low end, just cruising around the streets i kept trying to shift into 7th gear. problem is no banshee has a 7th gear! the +4 makes 6th pull like 5th, and 5th pull like 4th. so it kept fooling me into thinking i was in a lower gear than i really was.
i also cut 3 loops off of each carb return spring. another nice improvment. no more sore thumb!