93 (86) trx 350D fuel pump voltage reads 5volts

Thank you goober. I have not yet done a flow test. The bike is starving for fuel but only after riding for a while. It starts and runs at idle all day, once we go for a ride the bike stalls at idle but starts and runs again, eventually though it will choke out and the pump can’t pump hard enough to get fuel to the carb. I can see it bubbling in the tube and hear it pumping. The carb also has no response to adjusting the idle speed screw, potentially a separate problem. I believe it to be that periodically the pump doesn’t receive enough voltage to pump fast enough maybe. I am not to sure. I am cleaning the carb tomorrow and reassembling the system . What are your thoughts? Also I don’t know if the pump is oem . I bought it used the tape around the contacts looks newer than 26 years old, it’s most likely a replacement

Thank you for your help goober, I have cleaned the fuel tank. It was full of rust and sediment, I will be doing a carb clean today and flow test as well once I put the tank back on the bike. The petcock is clean and seals are good. The honda techs at my dealership are saying that the voltage at the pump should be 12 volts. I will do a flow test with the pump hooked up and then with it connected to a 12 volt supply to see if there is a difference. Great advice by the way, thank you for the model compatibility update, i will report back after it is reassembled, when the bike was running the idle adjust screw had zero response, I want to see if the recent work makes a difference

Thank you for your help ?. I am just getting into the shop now and putting the tank back on for the flow test

Flow test produced twice the fuel amount when connected to straight 12 volt supply

So far after cleaning the fuel tank, changing fuel filters, cleaning fuel lines and carb and making the recommendations for carb adjustments the bike still stalls after initial start at idle after riding 2 minutes, also the choke functions properly but stalls the bike when open and the idle adjustment screw has no effect. The fuel cut off relay tests 9 volts at the pump connector while running. I think it’s faulty, however when the pump is connected to straight 12 volt supply it pumps more fuel then when connected to the relay.... that being said the bike still performs the same whether the pump produces 12 or 9 volts at the pump, I performed a test bypassing the relay. What are your thoughts???? Could the pump be faulty and the relay? Or is there something else causing the bike to die when idling???

The brass is flat on the bottom and the o ring is tapered, I have not rebuilt the carb just cleaned and reassembled, the fuel tank was rinsed with a baking soda solution. I am spending the $100 to replace the relay in hopes it solves the supply problem, do you know what may be causing it to stall and have no response with the idle adjustment screw?