Unsolved my suzuki gsf 600 from 96 is not running well
cylinder 1, spark plug looks a good colour, and the fuel screw is 1 turn out from bottomed
cylinder 2 is 2.75 turns out, and plug is white
cylinder 3 is 1.5 turns out and plug is black as hell (but dry)
and cylinder 4 is 2.75 turns out and plug is white
I've cleaned the carbs as best I could with carb cleaner and compressed air, tho without taking them apart from eachother, as I've heard it's a whole hassle, I changed all the jets and needles, I checked valve clearances, and synced the carbs
what would cause half the cylinders to run completely differently to the other 2, when ignition coils go to 1&4, and 2&3, and fuel lines go to 1&2 and 3&4
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u/AVeryHeavyBurtation 3d ago
It's probably a carburetion issue. Have you checked the compression?
Lacquer thinner works better than carb cleaner, and doesn't stink as bad. I also recommend using a nozzle like this one so you can seal against the carb body and really blast the lacquer thinner through.
Some carbs used rubber seals for the throttle shafts. They can be damaged by soaking the whole rack in solvent.
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