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DannoXYZ · November 2nd, 2021, 04:09 PM

Did you completely disassemble carbs down to every last nut, bolt and individual components?

Did you scrub out all hidden secret petrol passages in carb body with PEA-based fuel-system cleaner? BTW - seafoam is useless

Did you poke out all bleed-holes in jets, emulsion tubes, carb-venturi with soft copper wire?

Did you soak everything in ultrasonic cleaner for days on end in radioactive solvents?

Did you micro soda-blast everything @10000psi?

Hate to break it to you, but if you didn't do all that, carbs aren't factory-fresh clean. Clue is tightening and loosening pilot-screws temporarily fixes things. What's happening is sharp tip of screw pierces and squeezes against clog in bleed-hole in carb-venturi. Then when you loosen-screw, this opens channel for petrol to flow and bike runs. But, more goo and dried petrol from further down ends up flowing into circuits and clogs it up again. You'll need to do complete carb restoration, not just cursory cleaning.

November 2nd, 2021, 04:09 PM	#3
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Did you completely disassemble carbs down to every last nut, bolt and individual components? Did you scrub out all hidden secret petrol passages in carb body with PEA-based fuel-system cleaner? BTW - seafoam is useless Did you poke out all bleed-holes in jets, emulsion tubes, carb-venturi with soft copper wire? Did you soak everything in ultrasonic cleaner for days on end in radioactive solvents? Did you micro soda-blast everything @10000psi? Hate to break it to you, but if you didn't do all that, carbs aren't factory-fresh clean. Clue is tightening and loosening pilot-screws temporarily fixes things. What's happening is sharp tip of screw pierces and squeezes against clog in bleed-hole in carb-venturi. Then when you loosen-screw, this opens channel for petrol to flow and bike runs. But, more goo and dried petrol from further down ends up flowing into circuits and clogs it up again. You'll need to do complete carb restoration, not just cursory cleaning.