I have a 1980 XS400 which did not have a kick start on it , but it was a running bike. I pulled the case cover today to find a broken journal for the shaft and a piece the was additionally cracked that fell down into the bottom of the motor. I believe that this happened when a perspective buyer mounted a kick start lever to the bike and proceeded to attempt to "break loose the frozen engine". It wasn't frozen up at all, the kickstart gear had been removed and he was jumping on a shaft that was parked against it's stop. I find this out after the fact. I had been told only that it had a broken return spring. My question(s) is this: If I remove the broken piece(s), and cut down the kick start shaft to act as a plug only, is this engine salvageable? I have another complete bike but would rather have 2 running bikes than one and a parts bike if that could be avoided. Thanks in advance for your help.