High and Hanging Idle

notrocketscience · May 18th, 2024, 08:05 PM

After about 7 months of sitting around, I finally built up the courage to put some gas in my bike and see how it started. To my surprise (and after a lot of cranking) it finally shot to life and could sustain itself at idle.

While that's all great, I'm having an issue where the lowest I can get it to idle is around 1800 to 2100 RPM. My idle screw is no longer in contact with the throttle body (idk the technical term for that little springy guy on the carbs) and even then I'm still running high.

I've also noticed after revving up the engine, the idle will slowly drop and tend to stick around 5 or 6k.

I thought it might be a throttle cable issue, but the cables feel loose when I mess with the throttle. I was thinking it could be a mixture screw issue, but I'm not sure if I should increase or decrease the fuel ratio.

I've got many more issues with this beauty, but I figured this might be something the gurus have seen before. I'd appreciate any advice

ducatiman · Yesterday, 04:50 AM

synch issue, IMHO

Triple Jim · Yesterday, 06:18 AM

After looking into what ducatiman suggested, another possibility is air leaks between the carburetors and engine.

ducatiman · Yesterday, 11:21 AM

Quote:

Originally Posted by Triple Jim

After looking into what ducatiman suggested, another possibility is air leaks between the carburetors and engine.

certainly could be a cause for synch issues

May 18th, 2024, 08:05 PM	#1
notrocketscience ninjette.org newbie Name: Eric Location: Tucson, AZ Join Date: Jul 2022 Motorcycle(s): 2006 EX250F Posts: 9	High and Hanging Idle After about 7 months of sitting around, I finally built up the courage to put some gas in my bike and see how it started. To my surprise (and after a lot of cranking) it finally shot to life and could sustain itself at idle. While that's all great, I'm having an issue where the lowest I can get it to idle is around 1800 to 2100 RPM. My idle screw is no longer in contact with the throttle body (idk the technical term for that little springy guy on the carbs) and even then I'm still running high. I've also noticed after revving up the engine, the idle will slowly drop and tend to stick around 5 or 6k. I thought it might be a throttle cable issue, but the cables feel loose when I mess with the throttle. I was thinking it could be a mixture screw issue, but I'm not sure if I should increase or decrease the fuel ratio. I've got many more issues with this beauty, but I figured this might be something the gurus have seen before. I'd appreciate any advice

Yesterday, 04:50 AM	#2
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	synch issue, IMHO __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

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Yesterday, 06:18 AM	#3
Triple Jim Guy Who Enjoys Riding Name: Jim Location: North Carolina Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot. MOTM - Oct '18, Aug '17, Aug '16	After looking into what ducatiman suggested, another possibility is air leaks between the carburetors and engine.