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Old 24-09-2019, 09:07 AM   #2
slob
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Join Date: Jul 2003
Location: East London
Bike: Multiple Monsters
Posts: 9,733
I'd guess something else, the carb in question would struggle to achieve full throttle with a split diaphragm, since lifting the slide relies on a pressure difference either side of the diaphragm.

I'd try swapping the igniter boxes round and see if the misfire changes cylinders as a first step
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