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I've come crawling back again for some advice... I know there are plenty of threads about the float valves and flooding issues with the xs650, but I can't crack this one, hoping you'll bear with me..
So, I should've been all set to put a cap on my first ever build yesterday, got the tank mounted and the petcock hooked in, and for the first time since May, the bike had everything it needs to run. I turned on the lights, opened up the petcock, and got ready to kick my heart out, when gas started to leak heavy out of my shift side air filter.
Now, my petcock situation is nothing remotely close to the stock situation. I have an old Sportster tank with a manual petcock that splits down the line to feed into the T that feeds both the carbs, and the line that feeds in ahead of the shift side carb. My immediate thought was that the line that doesn't feed directly into the carbs must be some kind of reserve that only works with the stock petcock, and was causing the flooding. (I realize Im probably completely wrong, but I thought I'd try the most obvious thing first) So, I just connected my petcock to the fuel line that T's directly into both carbs, kicked it a bunch to no avail, and proceded
to watch gas leak from now both air filters. I thought it was just flooding from too many kicks, but it responded directly with the petcock valve. petcock valve open: gas leaking from both filters, closed: nothing. it is worth mentioning here that there are no leaks in the line either, just the carbs.
So, research suggests this probably has something to do with the floats. I was hesitant to believe this, as the PO (someone I trust) had the carbs completely gone through a week before I bought it, and they ran great back in may. Anyways, I opened up the bowls and reassembled the floats. They're the 1980 bs34s with the brass floats, No sticking, push pins and needles seem fine, and the height is where it should be at 27mm on both. Put the carbs back in, and still leaking, and engine not starting. (this was still with the petcock only connected to the carb T feed, not both lines)
So, my question is could there be something else going on in the carburetors that's letting too much fuel in? Could it be my petcock situation? Do I need to connect my petcock to both of those feeds, or is one just a redundancy in the stock system?
If you read this far, thank you. hope I was clear enough. I'll post some pictures when I get home in a couple hours.
So, I should've been all set to put a cap on my first ever build yesterday, got the tank mounted and the petcock hooked in, and for the first time since May, the bike had everything it needs to run. I turned on the lights, opened up the petcock, and got ready to kick my heart out, when gas started to leak heavy out of my shift side air filter.
Now, my petcock situation is nothing remotely close to the stock situation. I have an old Sportster tank with a manual petcock that splits down the line to feed into the T that feeds both the carbs, and the line that feeds in ahead of the shift side carb. My immediate thought was that the line that doesn't feed directly into the carbs must be some kind of reserve that only works with the stock petcock, and was causing the flooding. (I realize Im probably completely wrong, but I thought I'd try the most obvious thing first) So, I just connected my petcock to the fuel line that T's directly into both carbs, kicked it a bunch to no avail, and proceded
to watch gas leak from now both air filters. I thought it was just flooding from too many kicks, but it responded directly with the petcock valve. petcock valve open: gas leaking from both filters, closed: nothing. it is worth mentioning here that there are no leaks in the line either, just the carbs.
So, research suggests this probably has something to do with the floats. I was hesitant to believe this, as the PO (someone I trust) had the carbs completely gone through a week before I bought it, and they ran great back in may. Anyways, I opened up the bowls and reassembled the floats. They're the 1980 bs34s with the brass floats, No sticking, push pins and needles seem fine, and the height is where it should be at 27mm on both. Put the carbs back in, and still leaking, and engine not starting. (this was still with the petcock only connected to the carb T feed, not both lines)
So, my question is could there be something else going on in the carburetors that's letting too much fuel in? Could it be my petcock situation? Do I need to connect my petcock to both of those feeds, or is one just a redundancy in the stock system?
If you read this far, thank you. hope I was clear enough. I'll post some pictures when I get home in a couple hours.
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