i just received my head, which has been modified with the installation of a decompression valve, and i went ahead and had it milled down as well. now it kicks out more power from the extra compression, and it kicks over with ease! i can rest my foot on the kick starter when the valve is open and it will turn over. "oldtimer" from this forum did the machine work for me at his shop and it beats every price on the internet. if you want your cr500 to turn over easier without tearing up your boots and leg, hit him up! sorry if this sounds like a commercial but i just wanted to let the forum know that i had him do this work for me and it turned out great! thanks oldtimer!