This year I've used RK, DID and JT. DID lasted 1 race before stretching. RK lasted 2 races and JT X1R chain has survived 3 races and still going..
I'd go with an RK chain or JT
Thank you ; Mikey Moto, Blue Streak Racing, JT Sprockets, HiFlo Filters, Cycle Pro, Dyno-Jet. For your help and...