I'm really grateful for all the replies. I've been pretty heartbroken as it happened the second day of ownership. I bypassed the relay and have done 100miles. It rides absolutely perfectly.The Quantum pump draws 8 amps at 13.5 volts hence I suggested 10 Amp minimum fuse.
The only reason I did not use the Quantum pump is that I once had a fuel pressure regulator from them which was slightly oversize to the point that I thought it was going to crack the plastic housing when fitting. I did not get any help from them.
The pump from motorworks that I now use came in a Continental box as OEM and the Motorworks part number is FUA84025 .
The price is higher than I remembered at £84.50.
It seems you have been through all the major fuel related issues and are a bit of a guru on the subject. I like the idea of a gauge to monitor the pressure do you have any write ups on how to go about this?




