March 31st, 2020, 11:19 AM | #1 |
ninjette.org newbie
Name: Nick
Location: Pennsylvania
Join Date: Mar 2020 Motorcycle(s): 2012 Ninja 250r Posts: 6
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Carburetor issues
I have a 2012 250r im working on. When fully warm and choke off the bike idles like garbage for a while then dies (sometimes it just stays idleing like garbage around 1k) When trying to give it gas it'll just instantly die. I have noticed just looking without really taking anything apart a vacuum nipple (possibly) isn't connected is there suppose to be? I will post a picture
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March 31st, 2020, 11:31 AM | #2 |
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
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see if the other end of the hose I marked X is floppin around loose in there. If so...attach it to the RH carb vac barb
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March 31st, 2020, 11:40 AM | #3 |
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
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different angle, from front side of carbs, hose marked in yellow should be connected between RH carb barb and forward barb on decel valve as shown
coincidentally, just finished refurb on these this morning and snapped a pic in this view
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March 31st, 2020, 12:26 PM | #4 |
ninjette.org newbie
Name: Nick
Location: Pennsylvania
Join Date: Mar 2020 Motorcycle(s): 2012 Ninja 250r Posts: 6
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So everything should be connected the correct way now, but it is still having idle issues after choke is off. Even playing with the idle control it still studders then dies and instantly dies apon throttling. Carbs were cleaned and rebuilt, fresh gas was added as well. I know im probably missing something any other suggestion would be greatly appreciated.
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March 31st, 2020, 03:46 PM | #5 |
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
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What was motive prompting carb clean? Was bike dormant for extended period?
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April 1st, 2020, 09:35 AM | #6 |
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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
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Plastic port in original photo is for venting to atmosphere. There should be hose on it that goes back between intake-runners and down to rear-shock like other vent & drain hoses. That hose should be open so carbs can reference outside pressure for proper float-bowl operation.
What procedure and tools were used to clean carbs? Difference before & after in behavior? |
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April 1st, 2020, 05:03 PM | #7 |
ninjette.org newbie
Name: Nick
Location: Pennsylvania
Join Date: Mar 2020 Motorcycle(s): 2012 Ninja 250r Posts: 6
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So before I go in to details about the carb I've got a stupid questio. Would a bent air filter housing cap cause low idle and stall? Then instantly stall once throttle is use?
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April 1st, 2020, 05:15 PM | #8 |
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
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Welcome to Ninjette, btw
not stupid questions. Your issue is not airflow, but insufficient petrol to match increased airflow when you crack open throttle. While you only need 1/14.7th as much fuel as air (by mass), it may be very difficult to get even that little amount through tiny little holes and passages. Do search here for "clean carbs ducatiman" for threads of others with same problems. |
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