Originally posted by Yaki I am a little late
but I join that consensus.
I will make the same post i made recently in another thread on a similar topic.
The K-1II when combined with a modern DFA lens is very much improved over using a K-1 or K-1 II with an older DA or DA* lens.
I do not do much motorsports, but at this event last year with K-1 II + DFA 150-450 I got these kind of shots using AF-C. They were not a one-off..... over 90% of my shots that day were on target.
Use the latest lenses with your K-1 or K-1 II and you will have improved AF.