March 31st, 2019, 05:44 AM | #1 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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freaky carb/fuel issues
if you read my devil's whip thread, i had major problems with fuel/carbs on my ride. getting ready to tear into and find the problem. i did check petcock, mini fuel filter so far which looked ok. almost felt like water in gas or one of my circuits was partially restricted.
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March 31st, 2019, 10:00 AM | #2 |
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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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Did the condition present itself and degrade during the ride?
Before pulling carbs, drain the bowls and analyze. Water and fuel should separate, easily visible by eye. If water present, may save you a carb pull and solving is obvious. If no water, nothing less than a carb pull is then called for.
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March 31st, 2019, 11:20 AM | #3 |
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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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You mentioned it occurred after hitting some big potholes/bumps. Wonder if something got shaken out of place?
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March 31st, 2019, 11:39 AM | #4 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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it started after pothole hits. subtle at first, just low end, partial throttle. got progressively worse as the ride progressed affecting all circuits. got to the point with any chop of the throttle would cause massive hestitation.
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March 31st, 2019, 01:56 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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curious...are you running adjustable clip type needles?
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March 31st, 2019, 02:07 PM | #6 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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nope, stock needles shimmed with 2 washers. actually these are green bikes/godzilla carbs. dannoxyz rebuilt// cleaned red bikes carbs which now are on green bikes(which i sold)
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March 31st, 2019, 02:29 PM | #7 |
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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loosin' me with the green, red, godzilla stuff
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March 31st, 2019, 03:07 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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So carbs on this bike hasn't been professionally cleaned/refurbished.
Usual suspects: - clogged tank vent? Work better with gas cap open? - petcock's vacuum hose. What vacuum level does it give to petcock? Measure how much petcock flows in 60-seconds at that vacuum level. - needles, try with 1 washer Seems hitting bumps did something, i'm just not clear what could happen to carbs by bumps. - |
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March 31st, 2019, 03:11 PM | #9 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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i changed out vacuum hose at truck stop when i had issues. i will tear into it tomorrow.
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March 31st, 2019, 03:22 PM | #10 |
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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there are a couple oddball scenarios possible from extreme shock, but in any event, at this point...this is what is needed
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March 31st, 2019, 04:04 PM | #11 |
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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March 31st, 2019, 07:00 PM | #12 |
ninjette.org member
Name: Luca
Location: Westchester ny
Join Date: Nov 2012 Motorcycle(s): Ninja 250 Posts: 26
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I had the same problem on my 2012 this week after the bike was sitting for 6 months, i try to start it but no luck so i took the carbs off the bike took the bowls off the carbs and found some nasty gel in it,so i clean the carbs put them back try to start it again bike would start and die start and die,so i decided to drain the gas out of the tank to put fresh fuel in it, instead water was coming out for about 10 seconds and than gas started to come out so i put half gallon of fresh gas in it after 3 tries bike started fine and runs good now...Ethanol in today fuel it's the problem with water in the tank and gel crap in the carbs
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March 31st, 2019, 07:09 PM | #13 |
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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Rinsing all fuel-related parts with acetone should clear out water. It dissolves both polar and non-polar compounds.
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April 1st, 2019, 02:02 PM | #14 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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carbs pulled no evidence/clues so far
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April 1st, 2019, 06:14 PM | #15 |
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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Remove rubber tubes holding carbs to head. Remove all hose clamps completely.
Carefully inspect every inch of these tubes inside & out. Pry on edges. See if there are any cracks or tears. Did you have upper and lower mounts of airbox firmly screwed to frame? |
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April 2nd, 2019, 12:52 AM | #16 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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ok , i will check it today
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