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Classic Goldwing Technical Forums
GL1000
Leaking fuel into exhuast pipe... rough idle.
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<blockquote data-quote="ekvh" data-source="post: 147783" data-attributes="member: 1179"><p>Here's what works for me. Could be three areas, float valves, oring between carb and plenum, and the plenum gasket between the plenum halves. To check, bike or carbs level, dry the carbs off, remove the slides and caps, dry the venturi throats off, and turn the gas on. Watch for leaks. To narrow down the leak faster, cut and fit a piece of paper in the plenum base to see where it occurs first. If it's the plenum gasket, it will get wet in the center along the seam. If it comes from the sides, you now know which carb/carbs leak. Dry they off again and repeat this time watching in the opening for the slides. If it is coming from the brass jets, it's a float valve. If it comes down the venturi from the plenum side, it's the fat o-ring that seals the fuel port between the plenum and carbs. All easy fixes, but carbs have to come off. Do yourself a favor and rig a test source of a liter of fuel from six feet above the rack and test it before reinstalling on the bike.</p><p></p><p>If your float gaskets are aftermarket, they are likely junk. Another issue is cheap bowl gaskets which fit nicely dry, but swell and interfere with the floats when gas hits them. You can see this if you're paying attention when you first remove the bowl. Good materials like Randakks don't swell.</p></blockquote><p></p>
[QUOTE="ekvh, post: 147783, member: 1179"] Here's what works for me. Could be three areas, float valves, oring between carb and plenum, and the plenum gasket between the plenum halves. To check, bike or carbs level, dry the carbs off, remove the slides and caps, dry the venturi throats off, and turn the gas on. Watch for leaks. To narrow down the leak faster, cut and fit a piece of paper in the plenum base to see where it occurs first. If it's the plenum gasket, it will get wet in the center along the seam. If it comes from the sides, you now know which carb/carbs leak. Dry they off again and repeat this time watching in the opening for the slides. If it is coming from the brass jets, it's a float valve. If it comes down the venturi from the plenum side, it's the fat o-ring that seals the fuel port between the plenum and carbs. All easy fixes, but carbs have to come off. Do yourself a favor and rig a test source of a liter of fuel from six feet above the rack and test it before reinstalling on the bike. If your float gaskets are aftermarket, they are likely junk. Another issue is cheap bowl gaskets which fit nicely dry, but swell and interfere with the floats when gas hits them. You can see this if you're paying attention when you first remove the bowl. Good materials like Randakks don't swell. [/QUOTE]
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Classic Goldwing Technical Forums
GL1000
Leaking fuel into exhuast pipe... rough idle.
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