Well I have put nearly 1000 miles on the 73 Yammy TX750 and time for the first oil change. When we first rescued her, my buddy Randy had some Honda JP4 synthetic blend that we put in. Thing is its a 40+ mile round trip to the Honda dealer just to get the oil. I have been eyeballing several "motorcycle racing oils" at the local auto parts. Randy says that due to the balancer issue of foaming up the oil that I should run only racing oil because of the anti foaming properties. Anyone have knowledge of regular OTC oils other than Honda specific oils that will perform accordingly as far as anti foaming goes? Not so much concerned with the synthetic blending or not, just that its a rock solid durable oil for this engine.