March 26th, 2019, 08:11 PM | #1 |
ninjette.org member
Name: Alex
Location: Salt Lake City
Join Date: Mar 2019 Motorcycle(s): 2007 Ninja 250R Posts: 14
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250 Sputters and lags on acceleration at speed?
So I have come across a problem and as a newbie I still don't even know where to begin.
The bike seems to lag or stutter when I go full throttle when I'm cruising. I'll be going along in 2nd gear or 3rd then gun the gas and it like skips a beat until I shift gears again. This may be relevant but the idling is wonky, it sits really high and when I turn the idle screw a little down it will bog out the engine and maybe die or sit until revved again. Could it be carb? The gent I just bought it from said that it had been sitting for a minute as he didn't ride it. Any thoughts on what it might be? Any help would be much appreciated! I've never cleaned a carb before so if there's an easy way to check if it's that before taking the whole thing apart, any tips would be awesome. |
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March 27th, 2019, 08:00 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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Quote:
yes, very likely
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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March 27th, 2019, 05:21 PM | #3 |
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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Yes, you need to examine carbs closely. Symptoms indicate insufficient fuel delivery, most likely due to clogged carb fuel-circuits. As a test, you can try limiting air-flow to countre-act lack of petrol when going full-throttle. Read this thread and the linked ones within.
https://www.ninjette.org/forums/showthread.php?t=331186 |
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March 28th, 2019, 07:10 AM | #4 | |
ninjette.org member
Name: Alex
Location: Salt Lake City
Join Date: Mar 2019 Motorcycle(s): 2007 Ninja 250R Posts: 14
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Quote:
Any other suggestions if it wouldn't be the carb? |
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March 28th, 2019, 07:38 AM | #5 |
ninjette.org member
Name: Charlie
Location: Brick NJ
Join Date: Feb 2018 Motorcycle(s): Harley Fatboy, Honda CX500, Harley XL1200C Sportster, 305 Honda Dream, Ninja 250 Posts: 174
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The passage ways in a carburetor are extremely small. Just looking is not a way to ensure your carbs are clean. Even an ultrasonic bath will not always get the crud out. Fine wires, carb cleaner and air will after a good ultrasonic bath. I also use q-tips.
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March 28th, 2019, 07:44 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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fuel delivery issue?
*tank vent? *petcock? *air restriction (filter, intake snorkel?) you never clarified the "sitting for a minute" statement. Visually "spotless" is positive, but does not necessarily indicate clarity of circuits, fully justifying your confirming. Just who cleaned these carburetors...the previous owner? Did the bike ever run correctly during your ownership?
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gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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March 28th, 2019, 05:15 PM | #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:
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