Does Goku always use Kaioken?
I just wondered- does Goku use the Kaioken technique throughout the entire series? If so, does this mean that his base power level is actually much lower than Vegeta and Gohan?
Or to put it another way, if the other Saiyan characters knew kaioken, would they be stronger than Goku?
It would certainly explain Vegeta's failure to surpass Goku despite apparently training harder.