Hello everyone. First time poster in need of some serious help. I have a 2007 ZX6r and I have ran into a dilemma that I cannot seem to figure out. When I attempt to start my bike, it just turns over and doesn't fully crank. Battery is fresh, all the sensors are working great and the bike is getting fuel. I have ran a compression test on the cylinders and 3 are running below 50 psi, which I find to be extremely odd for a bike that has less than 5k on it. I cannot for the life of me figure out what the issue is and the shop is wanting at least $600 to take it apart just to figure out what is wrong. Any help would be greatly appreciated.