J
Jagir
Guest
tank is clean?
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Glad to hear it passed its test. I hope it stays happy.
If it was related to float bowl venting, I've always preached here to remove the vent lines if you run pods, but keep the lines on if you have a stock intake.
I can't say from your description just how abruptly the bike stalled, but vent lines issues (always poor fuel flow) aren't usually that abrupt but more like starting to run out of gas, hesitation, or like hitting a head on wind gust. Still possible though.
Mixture screw adjustment is very important but has an effect depending on the throttle position you were at during the stall. Your model at general highway speeds, would be operating on the jet needle with some pilot circuit (mixture screws) overlap. The way excessively rich mixture screw adjustment could cause a sudden stall would be if the mixture was too rich and you fouled the plugs. But since you were at least partly off the pilot circuit (operating on the jet needles) it seems that overly rich mixture screw adjustments and any problems, would have been MUCH more obvious at minimal throttle openings where you're riding almost completely on the pilot circuit. Also, if the mixture was too rich and fouled the plugs, then it shouldn't re-start after several minutes because the plugs would still be fouled from soot and they can't clean themselves off that easy. So it's possible, but I think the mixture screws weren't the cause of the stall.
You did say the fuel and vacuum lines were originally left longer than necessary though. That can cause problems. Kinks don't allow good vacuum to the petcock and fuel can slow to a trickle from either hose being kinked.
If it was related to float bowl venting, I've always preached here to remove the vent lines if you run pods, but keep the lines on if you have a stock intake.
I can't say from your description just how abruptly the bike stalled, but vent lines issues (always poor fuel flow) aren't usually that abrupt but more like starting to run out of gas, hesitation, or like hitting a head on wind gust. Still possible though.
Mixture screw adjustment is very important but has an effect depending on the throttle position you were at during the stall. Your model at general highway speeds, would be operating on the jet needle with some pilot circuit (mixture screws) overlap. The way excessively rich mixture screw adjustment could cause a sudden stall would be if the mixture was too rich and you fouled the plugs. But since you were at least partly off the pilot circuit (operating on the jet needles) it seems that overly rich mixture screw adjustments and any problems, would have been MUCH more obvious at minimal throttle openings where you're riding almost completely on the pilot circuit. Also, if the mixture was too rich and fouled the plugs, then it shouldn't re-start after several minutes because the plugs would still be fouled from soot and they can't clean themselves off that easy. So it's possible, but I think the mixture screws weren't the cause of the stall.
You did say the fuel and vacuum lines were originally left longer than necessary though. That can cause problems. Kinks don't allow good vacuum to the petcock and fuel can slow to a trickle from either hose being kinked.
G
Guest
Guest
Thanks Keith,
OK, I'll add one more contributor to the "highway death" issue, supplementing the vent tubes & mixture screw "fault" causes.
Anyway, as we all know, fixing these bikes often seems to involve resolving many little issues, and occasionally some large ones. In the end you never really know which fix produced that biggest bang for the buck.
Next "upgrade" will be the oil cooler install from the parts bike I have, but that can wait for now.
Keep smilin'
Mike
OK, I'll add one more contributor to the "highway death" issue, supplementing the vent tubes & mixture screw "fault" causes.
Excessively long fuel & vac lines.
Although they were never "kinked" (I checked repeatably), they were each aprox. 12"-14" long or so before I trimmed them to their proper size of approx. half that length. They were always clamped at both ends, but perhaps they simply could not perform as they should being that long. It was A LOT easier to adjust the carbs that way however, as the tank was just resting on its mounting bolts - just had to "lever" it up from the back & rest it on a calibrated shim device (otherwise known as a wood shingle trimed to an exacting length). Reach in, pull plugs, adjust carbs and drop it back down again. I ran it that way for many weeks with NO problems. However, no highway jaunts either.Anyway, as we all know, fixing these bikes often seems to involve resolving many little issues, and occasionally some large ones. In the end you never really know which fix produced that biggest bang for the buck.
Next "upgrade" will be the oil cooler install from the parts bike I have, but that can wait for now.
Keep smilin'
Mike