Pigdog,
Where are your numbers coming from? BMW or some other source. In the old days there was a dyno company here in Northern California. We loved HP numbers from this guy 'cause he had very small horses in his dyno so you always got lots of them when you made a run.
When asking questions such as this there are so many factors involved that all the information must be there to give a proper answer. Which specs,what year which model motorbike not to mention what year ??????????????????