Try MX rider.
Probably one of the best MX games with motorcycles (no goon buggies). It's a better race game than MX2002 and ATV with complete seasons for 125, 250, and 500s (outdoors only). Great variety of tracks and once you get into it, you'll realize some of the finer details that they took into consideration like rider's body position and some of the handling/physics. It also does sponsorships, qualifying, and such but nothing like you are after 842. It has freestyle but it is obvious that the racing was the main focus (thank goodness)
It can be had for $20 new....definitely worth it compared to Superfly, MX2002, Freakstyle, McGrath Stupidcross, and even ATV Couch racing 1 and 2.
Only problem is that it is based on Euro racing.
I think MX Unleashed got backed up til spring but this sounds like it is going to be a big step up as far as MX games go....I hope it delivers.