Maybe it would be safe to say that advancing timing won't decrease engine braking? I don't know. It may or may not. It would depend on more variables. But for the OP here it would not help. He needs to calm down the low end a little. It would be nice if Yamaha would of given a Fuel boost cell for the throttle hit. It would be loved by the YZ guys. It kinda works like an accelerator pump on a carb. But would give us the tool to have more control at the hit.