Originally Posted by
strock
+1 If I read your post correctly, you can't shift onto the largest cogs (that is, into your lowest gears). If your limit screw isn't the problem, then it's likely that your cable doesn't have enough tension. Tighten the cable by the proper amount, and you should be fine.
That's what I figured, I just bought the bike used so I haven't yet touched the cables yet, I was tuning it figuring all I needed was an adjustment of the limit screws.
Update: After some fine tuning the derailleur is humming along. It makes the tolerances on the front derailler pretty tight but it's all smooth as silk now.