My cossy was low on power top end the last time I used it so I had a check of a few things found that one of the spark plugs had melted strange as it still ran fine no missfire
Anyway obviously running lean top end so need to find out what is the cause.
First thing I noticed is the Grp A fuel pump I fitted not so long ago is making some strange noises when priming and at idle, sort of a groaning noise anyway this don't seem right, could it be anything else other than the pump causing this noise as I suspect this is related to my running lean problem too.

Also what sort of flow rate should I expect from one of these pumps..

CheeRS Dean.