August 9th, 2020, 05:19 PM | #1 |
ninjette.org newbie
Name: Ty
Location: 2221 s.w 60th
Join Date: Aug 2020 Motorcycle(s): 06 ninja 250 Posts: 2
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pulsing idle 06 250 ninja
the idle on my bike float up and down at about 1000 rpm pulses what could cause this
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August 9th, 2020, 06:00 PM | #2 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Vacuum leak possibly.
Have you made adjustments to the Idle Mixture Screws? Removing caps - https://faq.ninja250.org/wiki/Removi...re_screw_plugs Making adjustments - https://faq.ninja250.org/wiki/How_do...dle_mixture%3F |
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August 9th, 2020, 06:36 PM | #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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petcock, float system, idle circuit issues....could be multiple, non-obvious stuff going on.
Example...out of spec, high fuel levels (both or 1 carb) don't necessarily spew onto the garage floor, not visible ....therefore possible to go undiagnosed.
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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September 1st, 2020, 04:56 AM | #4 |
ninjette.org member
Name: Michael
Location: Paisley
Join Date: Aug 2020 Motorcycle(s): Ninja Posts: 15
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Im having the same problem on my 06 i have a jet kit installed no vacuum leak didn't have the problem till after the jet kit was installed. Im leaning towards the fuel filter or the air valve for the tank its almost like its not filling the bowl fast enough and the idle will go from 1500 to 500 and back between 1500 and 2000 dont know if yours is the same but if it will help ill let you know if i figure it out.
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September 1st, 2020, 05:40 AM | #5 | |
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
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Quote:
(1970s) Kawasaki triples use non-Mikuni parts and they all make the carbs unusable. They do make a few bucks for everyone in the supply chain though. I bet @ducatiman can let us know whether kits for our 250s are usable or not. |
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1 out of 1 members found this post helpful. |
September 1st, 2020, 06:42 AM | #6 |
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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So many copycat carb kits on the market currently. Within my service I strive to restore and reuse precise, correct OEM Keihin tuning components (jets, needles, needle jets) wherever possible with the exception of orings, and float valves....the normal consumables which get replaced with new. My chosen stuff tried and true. I avoid any copycat crap.
Of course, in regards to jetting....bigger is not necessarily better, as member @DannoXYZ has documented in detail on this very forum. Truly clean circuits, careful setup and adjustment usually reward with a fine running 250. Once you are pulling airbox, playing with exhaust....individual requirements will differ....all bets are off.
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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September 1st, 2020, 10:32 AM | #7 | |
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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Quote:
Did you check valve-clearances? What are they? Which jet-kit did you install and which jet-sizes? Really need wideband-O2 datalogs or dyno-testing to tune with jet-kit. Otherwise, there's absolutely zero way you can determine what jetting changes are needed. Bet if you go back to bone-stock, idle will be perfectly fine. Last futzed with by DannoXYZ; September 1st, 2020 at 11:55 AM. |
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1 out of 1 members found this post helpful. |
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