November 22nd, 2017, 03:59 PM | #1 |
ninjette.org newbie
Name: Steve
Location: Sierra Vista, AZ
Join Date: Aug 2014 Motorcycle(s): 2007 Ninja 250, 1985 Honda XR200R Posts: 3
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Fuel Not Flowing to Carb Bowls
Have a 2007 Ninja 250. Currently getting the fuel tank cleaned as it sat a while with gas. Noticed that when I start the engine the fuel is not flowing to the carb bowls (I had drained them first) and the engine does not start. It appears the petcock is working to flow fuel when there is vacuum. So, if fuel is not getting to the carb bowls, does that indicate the internal carb passages are clogged? Perhaps I need to pull the carbs and clean them. Not looking forward to that. Thanks.
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November 22nd, 2017, 04:42 PM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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HI Steve, it's good to meet you. If you're saying that the output hose of the petcock flows plenty of gas when you disconnect it from the carbs and crank the engine, but it's not getting to the float bowls, yes, something is wrong, like the float needles are stuck closed from gasoline turning to varnish. You can bet that if that's the case, there's a lot more to clean then the float needles and seats.
You may know, but Ducatiman here on the board does professional carb refurbs at a reasonable price. That is, if you don't want to do the work yourself. |
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November 22nd, 2017, 04:51 PM | #3 |
ninjette.org newbie
Name: Steve
Location: Sierra Vista, AZ
Join Date: Aug 2014 Motorcycle(s): 2007 Ninja 250, 1985 Honda XR200R Posts: 3
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Thanks Jim. That makes sense. Guess it's time for me to pull the carbs and learn why my next bike should be fuel injected.
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November 22nd, 2017, 05:30 PM | #4 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
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I'm not sure you'd be any better off with a fuel injected engine that has old stale fuel that's turning to varnish in the system.
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November 22nd, 2017, 06:15 PM | #5 |
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.
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Except fuel doesn't evaporate in a sealed FI system. It stays liquid pretty much forever since there's no openings. I've started up cars that's been sitting for years and no fuel-problems.
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November 22nd, 2017, 06:24 PM | #6 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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That's good to hear, because I have one of those that I'll need to get running before long.
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April 26th, 2022, 07:20 PM | #7 |
ninjette.org newbie
Name: Zach
Location: Ohio
Join Date: Apr 2022 Motorcycle(s): Ninja 250 Posts: 8
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Did you figure it out I got same problem
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April 26th, 2022, 07:29 PM | #8 |
ninjette.org certified postwhore
Name: AKA JacRyann
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Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
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Hi Zach, verify petcock actually flows or doesn't flow petrol:
1. disconnect fuel-hose from carbs and aim into cup/bucket 2. apply vacuum to petcock's smaller hose (with vaccum pump or by sucking on hose, dangerous) Does fuel come out of petcock? |
1 out of 1 members found this post helpful. |
April 26th, 2022, 07:31 PM | #9 |
ninjette.org newbie
Name: Zach
Location: Ohio
Join Date: Apr 2022 Motorcycle(s): Ninja 250 Posts: 8
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Yes if I unhook line from petcock and crank it gas comes out Iv cleaned carbs prolly 5 times last time I put gas in carbs put bowls on and it started tilll it ran out loosed drain screws and nothing came out
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April 26th, 2022, 10:23 PM | #10 |
ninjette.org certified postwhore
Name: AKA JacRyann
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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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Try testing other end of fuel-hose. Leave connected to petcock and disconnect from carbs. Then crank again.
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April 27th, 2022, 04:18 AM | #11 |
ninjette.org newbie
Name: Zach
Location: Ohio
Join Date: Apr 2022 Motorcycle(s): Ninja 250 Posts: 8
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Fuel comes out that way also
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April 27th, 2022, 05:44 AM | #12 |
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Name: Gordon
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__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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