Yamha xt 350 engine tuning

 Hello all! I recently bought a year 2000 yamaha xt 350 and am unsure
of its service history.
 It has 5500 km, 3300 miles on it and I want to know what should be
adjusted, tweaked etc as I want to be sure it is running properly and
continues to do so.
 Specifically I want to know what the valve clearances are etc as I am
unsure that it has ever been serviced since new
 Thanks for the help in advance!

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