On my 17 assault I went with 19top, 42bottom, and 74p chain. SLP Blue pink primary spring and epi bb 60 gram weights. Gates 45c4553 belt. SLP Black purple secondary spring and one delrin washer.= super snappy low and mid range and pulls 8150-8200 consistently in powder. Great for on/ off throttle tree riding. Cooler belt temps too
