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1977 Suzuki GS750 issue
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<blockquote data-quote="2strokesteve89" data-source="post: 175120" data-attributes="member: 1670"><p>Sounds like 2cylinders running lean (the hot ones) and the other two either rich or misfiring. You can identify a misfiring cylinder by disabling 1 cylinder at a time, pulling a plug wire, or if they are hard to get to, pull all 4 plug wires, connect the wires to the plugs with small rubber hose( vacuum tube) the spark will travel thru the rubber hose to the plug, then just touch the hose with a grounded test light or if you don't have one something like a screw driver that's grounded to frame. This will kill the spark to that cylinder. If the rpm drops, that cylinder is carrying, if the rpm stays the same, you've identified a dead cyl. Then just diagnose misfire, you can't mess with the carbs until you've either ruled out a misfire or fixed it.</p></blockquote><p></p>
[QUOTE="2strokesteve89, post: 175120, member: 1670"] Sounds like 2cylinders running lean (the hot ones) and the other two either rich or misfiring. You can identify a misfiring cylinder by disabling 1 cylinder at a time, pulling a plug wire, or if they are hard to get to, pull all 4 plug wires, connect the wires to the plugs with small rubber hose( vacuum tube) the spark will travel thru the rubber hose to the plug, then just touch the hose with a grounded test light or if you don't have one something like a screw driver that's grounded to frame. This will kill the spark to that cylinder. If the rpm drops, that cylinder is carrying, if the rpm stays the same, you've identified a dead cyl. Then just diagnose misfire, you can't mess with the carbs until you've either ruled out a misfire or fixed it. [/QUOTE]
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1977 Suzuki GS750 issue
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