Four months ago I purchased a new fuel pump for my '04 749S. For the last 3 months I have not been able to ride due to health problems. Recently took the bike out.When I turn the key on, the pump primes and whines very loudly then the whining stops when the pump is primed. However, when I start the bike the pump whines again. Even while I am riding I can still hear a very high-pitched whine the entire time until I turn the bike off. The bike runs as it should. There is no hesitation or any fueling issues...just the noise. Should I replace the pump or live with the annoying sound? When I originally replaced the fuel pump I did not have the noise problem.