Prepare tools.
Remove case carb and take a coffee break.
Check the main pin.
Check main jet o-ring
Found o-ring deteriorate, It is the cause of oil leak
Prepare new o-ring
Replace new o-ring
Case carb rubber seal is damaged from my pull.
In Thailand, can not buy new spare parts for TMR carb. So, I used spare from secondhand TMR.
Thank you.