[Grunt_99]

Here's what I noticed re my 02 and backfiring (this was with a Yosh RS-3 w/o a jet kit). This is on cold starts, as in first start of the day. I'd open the choke fully, and if I waited a few secords or so, when I hit the starter I'd get a big ripper out of it. But if I open the choke and hit the starter right away, I wouldn't get a backfire at all.