- it's not abnormal to get some oil out of the breather during a hard run.
- sounding different.....could mean something or nothing. check your mufflers for any loss of packing or loose connections.
- the vibration is almost certainly a flywheel slipped on the crank pin, unless something is loose on your power train. it is a common problem with the new pressed cranks. that is why it is imperative the flywheels be welded to the crank pin before any performance modification are installed. to determine if this is or is not the issue, you will need to remove the cam support plate and measure the run-out on the pinion shaft. it should be nearly zero (0.000") but run out up to a few thou. is acceptable. the more runout, the more vibration. if left uncorrected it will destroy the oil pump.
- one other common issue with the twin cam engines is the oil pump alignment. this needs to be redone periodically as a matter of basic maintenance. you will have to perform the pump alignment procedure when you re-install the cam support plate.
- if it were my bike....I would perform the pump alignment first. if that didn't correct the vibration, I'd check the pinion shaft run-out.
- this assumes, however, that everything in the power train is properly torqued and nothing is loose, including exhaust system parts.
that is why it is important to go over the entire bike before starting into the engine.