In both cases, if the engine wasn't run lean or hot, you should be OK unless you are the kind of people that insist on running the engine for endless hours for break in. On the 46, they are very forgiving engines that require minimal if any break in. On the Saito, the main area of concern would be the plain aluminum, unbushed rod ends. If the engine turns over freely and without excessive rod end play, you should be OK.