Nah you dont need to check, if its been more than a month it wont hurt to adjust them again.
Take off your gastank and front fenders and hood just to make it easier. Pull the generator cover off and the cam cover, and the timing window plug. Turn the bolt under the generator cover untill you see a T in the timing window. There are both a T and an F so find the T. At this point the mark on the cam should also be in time. The mark on the cam sprocket should be lined up with the raised mark on the head.
At this point the motor is at TDC which is wat you want. Then you have to pull the valve covers off. Loosen both valve tappets and put a feeler guage under the valve tappet in between the tappet and valve spring top. Adjust the tappet untill the feeler guage fits pretty tight, to the point at which you cant pull it out easily, you shouldnt be able to put the next bigger size under the tappet. Then tighten the nut on the tappet and put and drop of BLUE medium strength loctite on the tappet so it doesnt come loose. Repeat for the exahust valve.
To finish off, turn the motor over very slowly 5 six times using the bolt under teh generator cover again, if at any point you feel the motor stop abruptly, STOP and dont force it, something is binding up. At that point you would have to re adjust the valves, most likely this will not happen since you are still using the stock cam.
Thats about it in a nutshell.
