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DannoXYZ · February 29th, 2020, 11:58 AM

I suspect his carbs aren't factory fresh clean. Symptoms he's having is exactly same as many "before" conditions found in searches for "ducatiman clean carbs". Yes, there may be some lean spots. But cause is NOT improper jetting, and solution is NOT to dump more petrol in, but to get carbs restored back to factory fresh condition.

Very common to have fuel-circuits between jets and carb venturi be clogged. No amount of jet-cleaning and poking will fix that. It's like garden-hose sprayer. Sure you can clean and ultrasonic your sprayer all you want, but what about those 25 golf balls stuck in 20ft of hose?

I bought set of freshly restored EX500 carbs from ducatiman specifically because of this concern. It has all new parts (including all rubber seals). No amount of cleaning will fix worn rubber O-rings. As result, my 500 started right up with no problems. Screams through RPMs range like wild banshee. Factory mixture is on rich side already, so no need add any extra.

February 29th, 2020, 11:58 AM	#32
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	I suspect his carbs aren't factory fresh clean. Symptoms he's having is exactly same as many "before" conditions found in searches for "ducatiman clean carbs". Yes, there may be some lean spots. But cause is NOT improper jetting, and solution is NOT to dump more petrol in, but to get carbs restored back to factory fresh condition. Very common to have fuel-circuits between jets and carb venturi be clogged. No amount of jet-cleaning and poking will fix that. It's like garden-hose sprayer. Sure you can clean and ultrasonic your sprayer all you want, but what about those 25 golf balls stuck in 20ft of hose? I bought set of freshly restored EX500 carbs from ducatiman specifically because of this concern. It has all new parts (including all rubber seals). No amount of cleaning will fix worn rubber O-rings. As result, my 500 started right up with no problems. Screams through RPMs range like wild banshee. Factory mixture is on rich side already, so no need add any extra. Last futzed with by DannoXYZ; February 29th, 2020 at 01:02 PM.