05 TE250 here. All standard and never had a problem.
This bike is pure fun and I get an ear to ear smile every time I ride.
I have taken it to places were I never thought I could ride, but everything seems easy for the little TE.
It is hard to catch up with the 450's in fast roads, but for tight sections and real off road trails it is just perfect.
Maintenance is easy and not too expensive. At around 6.000 km I changed the piston and the valve seals because it was starting to use some oil, although compression was good and the valves were in spec.