Hey guys,
You may remember me. I'm the Colombian biker who went down back in may. Details here: https://www.st-owners.com/forums/showthread.php?152842-Lonely-ST1100-down-(pics)-rebuild-vs-naked-vs-scrap&highlight=mauricio
Here she is back up on her feet after a thorough restoration (absolutely no new plastic. Even the mirror covers were rebuilt):
But unfortunately, not for long. The ride back home after four months at the body shop, ended like this:
Half way through the ride coolant temp went through the roof. At that time I was loosing power. Promptly killed the engine, coasted to a stop and waited for a couple of minutes. When I tried to restart she didn't fire. Arrived home on piggy back and the following day, removed the restored plastic. Pump wouldn't prime when opening the switch although it does happily hum away with a direct 12V feed from battery. Tested for 12V at positive pump connector, switch open. Nada. Tried removing the fuel cut off relay and shorting blue with brown and black with brown at the connector. Still doesn't prime. BTW, the petcock valve was removed and bypassed many years ago.
Brown is the feed to the pump. Black comes from the coils. Blue comes from the ICM. Green is ground. So I looked for 12V on blue and brown, switch open. No cigar. As a last resource I ran the pump from the battery for a while until the fuel filter was full. Started right away. Let her run to test fan. With pump unplugged it would soon starve (revs drop). Hot wire from battery to pump brings it immediately back to life which confirms pump is fine. So I decided to connect all the default wires back to the pump and relay and much to my surprise, it kept running like a champ. 12V at the pump connector. Pulled the relay while the bike was still running and got 12V at both the blue and black wires. Weird.
Got hot again and no fan (that's another story) so I killed the engine. A while later, again no go. Once more, won't prime. No voltage at pump or relay connector.
Any ideas?
Thanks!
Mauricio
You may remember me. I'm the Colombian biker who went down back in may. Details here: https://www.st-owners.com/forums/showthread.php?152842-Lonely-ST1100-down-(pics)-rebuild-vs-naked-vs-scrap&highlight=mauricio
Here she is back up on her feet after a thorough restoration (absolutely no new plastic. Even the mirror covers were rebuilt):
But unfortunately, not for long. The ride back home after four months at the body shop, ended like this:
Half way through the ride coolant temp went through the roof. At that time I was loosing power. Promptly killed the engine, coasted to a stop and waited for a couple of minutes. When I tried to restart she didn't fire. Arrived home on piggy back and the following day, removed the restored plastic. Pump wouldn't prime when opening the switch although it does happily hum away with a direct 12V feed from battery. Tested for 12V at positive pump connector, switch open. Nada. Tried removing the fuel cut off relay and shorting blue with brown and black with brown at the connector. Still doesn't prime. BTW, the petcock valve was removed and bypassed many years ago.
Brown is the feed to the pump. Black comes from the coils. Blue comes from the ICM. Green is ground. So I looked for 12V on blue and brown, switch open. No cigar. As a last resource I ran the pump from the battery for a while until the fuel filter was full. Started right away. Let her run to test fan. With pump unplugged it would soon starve (revs drop). Hot wire from battery to pump brings it immediately back to life which confirms pump is fine. So I decided to connect all the default wires back to the pump and relay and much to my surprise, it kept running like a champ. 12V at the pump connector. Pulled the relay while the bike was still running and got 12V at both the blue and black wires. Weird.
Got hot again and no fan (that's another story) so I killed the engine. A while later, again no go. Once more, won't prime. No voltage at pump or relay connector.
Any ideas?
Thanks!
Mauricio