Hi, I have a 1982 kawasaki kz440 LTD with 25k miles on the body and an unknown amount of miles on the motor, the guy I bought it from replaced it. I have just recently gotten into motorcycles so I don't know too much. Anyways recently as I was riding down the highway my bike lost almost all of its power, like it was running out of gas almost, and then made a noise, as if a rod or something broke off and was beating around inside the engine. I pulled over to the side of the road and turned off the cycle right away. I started it up about 5 mins later and as ti sat at idle it sounded normal. So I slowly rev'd the engine up and when it got to about 5k rpm I could hear it again, the noise of something beating around inside, so I shut it off and its sitting in my garage. Any help is appreciated.