7 pumps are identical to the one in the link, the end cap only covers the relay, the pump mechanism is sealed. The diode is worth a try, I will just use some other pump if mine goes out again, there is plenty of room for a more reliable pump that doesn't cost $160.00. 2 psi is easy to get, I know NOS sells a small inline pump rated at 18 gallons per hour and 5 1/2psi for $100.00. There are tons of OE pumps that could be used as well just a matter of going to a parts store and doing some research.
2000 748 Superbike