I ahve recently bought a kawasaki kx450 and i want to be able to really look after it (its my first new bike) so im trying to improve my mechanical knowledge!
With a kickstart, when you move it down it suddenly goes from loose and easy to push to really hard, initially i always thought this was the ratchet system of the kickstart starting to move the piston up/down. But i was informed that its actually starts moving as soon as you move the kickstart down and that its actually the gas and air mixture compressing in the cylinder right? So once it starts compressing and gets hard then generally you move the kick lever back to the top so you can get a full kick on it. so why is it that once the cylinder is compressing the air and gas and you move the kick lever to the top its not hard to push down straight away? Even tho where it gets hard to push is slightly higher its still not at the top. Why is that?