Well i dont see any new posts but lots of mentions of these arctic cat 660's. I have a carry with no motor so i bought 2 of these. They are f6a's i know i need a couple of parts but where i find no information is the microsquirt. I see some people have tried but failed with cam pick up. I'll see if it will run with crank signal only, like a ls. Anyone here had success with this yet?