1978 Yamaha XS750SE
Problem: One of the petcocks was leaky, about two drips per second.
Attempted Solution: Rebuild petcocks.
Application: Drained tank, took petcocks off tank, disassembled (noting of what goes where and how it all fits together), reassembled with the new pieces from the rebuild kit, attached petcocks to tank, reattached fuel lines, filled with gas. All seemed right. No leaks. This was two weeks ago.
What happened next: I was getting a lot of front brake drag and decided to rebuild the front master cylinder. I rebuilt the MC last night and reinstalled it on the bike this afternoon. After bleeding the brakes I figured I should take it around the block and check the brakes.
No brake drag. But the bike was having a hard time idling at intersections and it ultimately died and I couldn't get it to start again (neither push button or kick start).
Then I saw the gas dripping on the ground.
All the hoses were on securely and it looked like the petcock / gas tank gasket was where it was coming from. But when I got home and took off one of the hoses to drain the tank it just kept pouring out. This was the case with both petcocks.
I tried all three positions (ON, RESERVE and PRIME). None of them would stop the gas from flowing. Prime was a fuller stream. But RES/ON didn't stop the flow.
I've pulled the petcocks off the tank again and inspected my handiwork. Everything seems like it was in the right place (to the best of my knowledge), so what gives?
--
If anyone that could give me some insight as to what I should be double/tripple checking or where I can troubleshoot, i'd really appreciate it.
Looking forward to your take on this.
Thanks,
Ian
--
Problem: One of the petcocks was leaky, about two drips per second.
Attempted Solution: Rebuild petcocks.
Application: Drained tank, took petcocks off tank, disassembled (noting of what goes where and how it all fits together), reassembled with the new pieces from the rebuild kit, attached petcocks to tank, reattached fuel lines, filled with gas. All seemed right. No leaks. This was two weeks ago.
What happened next: I was getting a lot of front brake drag and decided to rebuild the front master cylinder. I rebuilt the MC last night and reinstalled it on the bike this afternoon. After bleeding the brakes I figured I should take it around the block and check the brakes.
No brake drag. But the bike was having a hard time idling at intersections and it ultimately died and I couldn't get it to start again (neither push button or kick start).
Then I saw the gas dripping on the ground.
All the hoses were on securely and it looked like the petcock / gas tank gasket was where it was coming from. But when I got home and took off one of the hoses to drain the tank it just kept pouring out. This was the case with both petcocks.
I tried all three positions (ON, RESERVE and PRIME). None of them would stop the gas from flowing. Prime was a fuller stream. But RES/ON didn't stop the flow.
I've pulled the petcocks off the tank again and inspected my handiwork. Everything seems like it was in the right place (to the best of my knowledge), so what gives?
--
If anyone that could give me some insight as to what I should be double/tripple checking or where I can troubleshoot, i'd really appreciate it.
Looking forward to your take on this.
Thanks,
Ian
--
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