I'm trying to get a handle on tuning this MR12 I'm finishing up the break in on. When I nail the throttle, it's a slight bog, then the engine falls flat on it's face just about when it's set to shift into second. When I let off the throttle, the idle hangs up a bit then goes back to normal. I'm pretty sure the engine was not overheating (temp aroung 215 on a +-60 degree F afternoon). Are both needles set too rich right now?

Also, can anyone comment on the power band on these engines? Should I gear it short like the CRF (I'm guessing nowhere near as short as that engine, but still) or will it pull whatever you give it?

All I know is compared to my NSR12, this thing seems (and sounds) silly fast.