there was a huge thread about this on snowest. the looser the track the way the lugs hit the snow is different.....may be ok with small lug tracks but if you get alot of looseness of the track off the drivers as it goes down the rail tips the lugs could be angled back or angled forward and hit the snow not as intended for the track design....Its a long shot this would happen but could take away from the pros ability to get up on the snow as well as it does.
ok i was just wondering cause it seems tight but its at what the manual says, my last sled i ran the track looser and no problems but I'll run it the way the manual shows