beemerguru
Member
'85 K100RT. Bike starts perfectly and runs great. BUT after the engine spins up past 2K rpm, it sounds like a bee hive in the gas tank. RPMs drop down to idle and it sounds normal..revs up, noise come back. And it's LOUD!! Easy to hear it over the engine at redline.
3 new fuel pumps tried- both sizes, new fuel filter,all lines replaced, new fuel pressure regulator. Good spray pattern from all 4 injectors.
Already checked to make sure the pump is seated properly so no contact vibration..Took everything apart and blew out all the lines and old regulator. Noise still there so replaced that too.
I'm out of ideas. Anyone know where this beehive is hiding?
3 new fuel pumps tried- both sizes, new fuel filter,all lines replaced, new fuel pressure regulator. Good spray pattern from all 4 injectors.
Already checked to make sure the pump is seated properly so no contact vibration..Took everything apart and blew out all the lines and old regulator. Noise still there so replaced that too.
I'm out of ideas. Anyone know where this beehive is hiding?