API (American Petroleum Institute) ratings are just measures of oil quality as far as I know. It shouldn't make any difference to that engine at all. I'm pretty sure that a non-API rated oil would be worse for your engine...
02' Honda XR650L
01' Ducati 750SS
99' Honda CR250/500 Hybrid Supermoto
It is of interest to note that while some dolphins are reported to have learned English -- up to fifty words used in correct context -- no human being has been reported to have learned dolphinese.