From new I have been a bitt dissappointed with my Summit.
I didn't seem quite as fast and strong as the ones I see on youtube.
Yesterday I got some noise from the Summit, and traced it down to be the slipper clutch. I adjusted my slipper clutch and could almost turn it clockwise 3 full turns. Now it has 1/4-1/2 turns out counter clockwise and it's brutal! Very fast, even stronger and it is SOOOO much more fun to drive!
I do think that my slipper clutch was wrong adjusted from the start, and that's why it seemed weak and slow.
Will order me some spares, this must kill the slipper clutch much faster