Guess I've been lucky in NOT working on too many X-mart products....at least I got him rolling....spent the afternoon doing it....very frustrating to work on. Wheels would not true, brakes would not adjust....At least the SIS Shimano's with friction thumb shifters worked up to par. Stiff, but predictable. Will have to hit the LBS, the one with BINS of greasy bits for cheap, and see what I can score for him. Plucked out a Sakae SA Double, up there last week for $10, along with a pair of SR SP-150 pedals for $5(missing one dust cap)