The TT Belgarda is a very strong and reliable bike.
the engine and frame lasts forever.
The XR is a little lighter in feeling, but the TT is more comfortable.
there used to be a saying "XT never die", the TT does not fail.
There are plenty of parts since its the XT engine.
This bike uses parts from all the big manufacturers such as brembo and bosch.
Following are some sites regarding the TT