I don't have saw in 90cc class but my 372xpgw would some what equal to your 440 and my 372 have a bar setup like follow 16"-18"-20"-24"
16" i run with 8pin rim and the others with 7pin ,,,,
my 372 pulls the 24" with authority, but the 20" seems like the best compromise of the bunch and 18" is nicest to run