Hi All 

I have a 2012 sportster forty eight. I have noticed that when i go to start the bike the fuel pump makes a funny loud noise before i start the bike , it sounds different to what it use to , i think this only happens when the bike is cold.

the bike get used every 3 weeks or so, i haave looked around and some people say it happens as the pump is priming itself.

any idea of what it might be , bike starts and seems to be running fine 

below is a clip to the noise , same sound but not my bike

https://www.youtube.com/watch?v=VnMMcf461RM

not sure if it is 

Pump Cavitation"... there is air getting in to the system so it has to reprime iteslf every time... in the end it it gets to bad that it wont pump might need to Try cleaning the filter and checking the pump seals..!

any comment or suggestions please let me know

thanks guys

Heard a few similar sounds and different ideas as to fixing it - bad fuel pump, hoses fucked and others saying it's normal. I only know I wouldn't like to hear it coming from my bike.

thanks for your comment Bonkerz, I called the one of the tech guys at harley heaven and he said its normal as i dont ride the bike alot its got to do with pressuring the fuel system.

i agree with you i dont like to hear it coming from my bike

Gday all,