I have some news. It looks like the TT600RE COMES WITH THE T-MOD (T off) ALREADY DONE. When I was about to do the T-mod tonight, I found a T-connector on one of the breather tubes, right above the carburetors. The tube that goes under the seat (from the T-connector) was pinched and completely blocked. Sloppy workmanship during assembly at the factory I’m sure.
This may explain why I have not found any posts from TT600RE owners regarding this problem. The TT600RE comes with the T-mod from the factory, it was just my bad luck that my bike had this assembly fault.
PLEASE DO CORRECT ME if I am misunderstanding something here. Looking at the pictures, can the T-connector and the tube under the seat be something else than the T-mod?
This is a T-connector that is located on top of the carburetors:

The tube that was pinched and completely blocked. It ends right by the air intake snorkel:

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Yamaha XT600E '01, Honda XR400 '03, Yamaha XT550 '83
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