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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
SC Conversions single carb install
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<blockquote data-quote="falconav8r" data-source="post: 152213" data-attributes="member: 4392"><p>OK...Here is one thing that must be done to this carb. I'm sure some may be aware of this and others not, but on the bottom throttle plate, there is an 1/8" diameter hole that was added to meet EPA requirements. This hole must be sealed shut by either a small dab of JB weld or take the plate off and solder this hole closed. This hole amounts to a large vacuum leak in the carb itself and does not allow the throttle plate to respond fully. As the throttle butterfly (at the base of the carb) is opened, there are a series of progression ports which are supplied fuel by the idle circuit. Not enough vacuum down low, means no fuel at idle - a carb that won't idle. This also means not enough fuel in the progression ports at lower RPMs - hesitation off idle.The 4 small holes on the side of the bottom throttle body are part of the fuel circuit and with that 1/8" hole open, you may not get the full amount of fuel under certain conditions.</p></blockquote><p></p>
[QUOTE="falconav8r, post: 152213, member: 4392"] OK...Here is one thing that must be done to this carb. I'm sure some may be aware of this and others not, but on the bottom throttle plate, there is an 1/8" diameter hole that was added to meet EPA requirements. This hole must be sealed shut by either a small dab of JB weld or take the plate off and solder this hole closed. This hole amounts to a large vacuum leak in the carb itself and does not allow the throttle plate to respond fully. As the throttle butterfly (at the base of the carb) is opened, there are a series of progression ports which are supplied fuel by the idle circuit. Not enough vacuum down low, means no fuel at idle - a carb that won't idle. This also means not enough fuel in the progression ports at lower RPMs - hesitation off idle.The 4 small holes on the side of the bottom throttle body are part of the fuel circuit and with that 1/8" hole open, you may not get the full amount of fuel under certain conditions. [/QUOTE]
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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
SC Conversions single carb install
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