hi everyody. i have a GXt 200b( = QuingQi SuperMotard 200cc) ,

i dont REALLY know how many kms i should clear or check the : " Carburetor " or "valve" , im new to this . my bike has 10.000kms right now 17-july2009 .
when it had 5000kms (the company where i bought the bike , the Mecanic person Ajusted or Checked or cleared the : Valve and carburetor) they charged me $us 65 ( here in Costa rica is alot of money for the maitenance , they told me every 5000 kms i have to do this ,and pay 65$ us, and my question is IF THIS IS NOT DIFICULT Thing TO LEARN how to do this maintenance ,i would like to learn it and save the money ...), after that i rode 5000 kms more . i need your adviced and help .

thanks in Advanced

Cz From Costa Rica.