How do you adjust valves on a yfz Yamaha?

Type your answer here... take it to a dealer.they are harder than you think to adjust without the knowledge,and it they are set out of wack.they can really do some engine damage and make it almost impossible to start.oh and it'll have three times the engine noise.I have these adjusted by a Yamaha dealer(delmarva power sports is where I took mine)and it wasn't to expensive.It costed me only $115 including labor plus $11.50 for shp supplies(all together $126.50)