I use the values for most of these parts as posted by CSC for the TT250. You can usually find the values toward the bottom of the articles.
http://www.cscmotorcycles.com/TT250-Tutorials-s/283.htm
Rear brake caliper bolts are 22ft-lbs.
Rear Axle Nut is 35ft-lbs.
Sprocket Nuts/Bolts 35ft-lbs.
Just don't forget to use blue loctite on the bolts.
