I just bought a brand-new KX450F. Should I change the oil after the first
ride or wait a couple of hours?
As a rule of thumb, MXA breaks its test bikes in and changes the engine
oil at the end of the first day. Although modern manufacturing has improved
over the decades, we are concerned about gear flashing, clutch-plate debris
and any leftover chemicals from assembly. We say that after two hours is a
good time to make the first oil change.