September 13th, 2014, 07:25 PM | #1 |
ninjette.org member
Name: Justin
Location: Phoenix, AZ
Join Date: Sep 2011 Motorcycle(s): 2007 Ninja 250R Posts: 82
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Help fishdip destroyed my bike!
OK, just kidding, mostly.
Its not an issue of the bike running, but it wont start up consistently. Also, once it is started, it runs sometimes just fine, but at other times it slowly dies. Here is what we have completed so far: Valves carb check changed plugs new air filter could this possibly have something to do with the fuel in tank? We are not sure how old it is. Any suggestions? |
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September 14th, 2014, 06:44 AM | #2 |
Rev Limiter
Name: Jay
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Have you adjusted the idle mixture screws and set the idle speed to 1300?
And yes - it could definitely have something to do with old fuel. Drain the tank completely and empty the floatbowls before doing much else. Run ethanol-free 87 octane, or the lowest octane without ethanol, and I'd add 1 oz per gal of Chevron Techron Concentrate once a year. You still want to get the idle mixture adjusted properly. Usually that is in the range of 2 1/2 turns out, then reset the idle speed. If the carbs haven't been synced lately I would do that as well. Those things (good fuel, correct idle mixture settings, correct idle speed, and carb sync) all need to be right in order to get it to idle properly. |
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September 14th, 2014, 08:13 AM | #3 |
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Name: Justin
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Yep idle mixture screws adjusted 2.5 turns and idle speed set at around 1300 RPMs. Carbs were synced visually also.
I guess old gas is the only explanation left. |
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September 15th, 2014, 07:38 AM | #4 |
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any other ideas?
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September 15th, 2014, 04:14 PM | #5 |
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You have got the right idea with blaming fishdip, however you still have possession of the problem, which is probably dirt in the idle circuit necessitating a tedious carb strip and blow through along with fitting an inline fuel filter if you haven't already.
Or you can keep blipping the throttle and swear at it a lot which is the technique under 18s usually use in my neighborhood |
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September 15th, 2014, 06:46 PM | #6 |
ninjette.org member
Name: Justin
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Well, there is a lot of sediment in the gas tank, and we didn't really do a thorough carb cleaning...but we did install a larger in-line fuel filter already. I was thinking it might be something with the CA emissions junk, but I just checked all the hoses and if nothing else, they are attached correctly. Also, it ran the first four days in a row when I bought it (but then it sat for 2-3 weeks, and I don't know the previous maintenance history before the first four days). The gas in the tank is what came with it though, so changing the fuel is an obvious thing to try next :-)
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September 15th, 2014, 08:25 PM | #7 |
Certified looney toon
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Random thought, may be nothing... Is any part of the CA junk filled with fuel?
My symptoms had the bike acting like it was out of fuel, despite having two gallons in the tank. The shop had to drain the entire system of fuel that had overflowed.
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September 15th, 2014, 09:16 PM | #8 |
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Not sure about whether the CA junk is filled with fuel. I am not sure how that would happen, but its possible I guess. I will check that this weekend!
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September 15th, 2014, 09:26 PM | #9 |
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If fuel overflows due to expansion or overfilling the tank, unlike the rest of the world, CA bikes don't drain out to the ground. Instead it flows into the emissions canister. Too much and it doesn't evaporate.
Since you're in AZ, there's a few helpful threads on here to get rid of that thing. I just bypassed mine and haven't taken the time to chuck it completely. Hopefully that helps. *fingers crossed*
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September 16th, 2014, 05:45 AM | #10 |
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"0 out of 1 members found this post helpful"
Is this the equivalent of 'unfriending' on facebook ? |
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September 16th, 2014, 07:37 AM | #11 |
wat
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sounds like gummed up petcock valving
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September 16th, 2014, 07:41 AM | #12 |
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we have not taken that apart yet. What gets me is once it starts it runs just fine. but it takes us 10min to get it started.
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September 16th, 2014, 08:28 AM | #13 | |
wat
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Quote:
easiest way to see whats going on is put a clear tube on the carb drain line and open it up with the tube going up... the gas will flow into the tube up to the height the fuel is in the carb... so you can see how high the fuel in the carb is. does it drain? does it overfill?
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September 17th, 2014, 04:44 AM | #14 |
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Carbs still dirty and/or bad gas. Take the jets out and soak them and clear out all the passageways including the choke. If your tank is so nasty it's clogging up the petcock filter and carbs I would install a fuel filter before running any more gas through the carb.
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September 17th, 2014, 05:04 AM | #15 |
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^^^ Wot he said
Don't forget that the fine rust dust that gets through the tap filter, although made of tiny particles too small to block a jet on their own can accumulate in the carb and coagulate into bigger chunks. Thats why you need the fine mesh line filter that you have fitted. |
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September 17th, 2014, 07:24 AM | #16 | |
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Quote:
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Hey Unregistered never go faster than your brakes can be applied... |
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September 21st, 2014, 03:11 PM | #17 |
ninjette.org member
Name: Justin
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We gave the carbs a better cleaning and got it running fine so far!
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October 8th, 2014, 11:19 AM | #18 |
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October 8th, 2014, 11:38 AM | #19 |
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If you have sediment in your tank remove it now!!! You need your tank clean; otherwise you won't solve your problem.
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October 8th, 2014, 11:44 AM | #20 | |
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Quote:
It is a short run from tank to carb though so the plumbing has to be just right. |
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October 8th, 2014, 11:54 AM | #21 | |
CPT Falcon
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Quote:
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October 8th, 2014, 12:10 PM | #22 | |
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Quote:
ie you cant leave them unchanged for years, but people do. That said if (unlike 1991 pregen me)you have a clean rust free tank TBH it is superfluous |
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October 8th, 2014, 05:13 PM | #23 |
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I've installed inline filters on all my bikes with no problems. I suspect those that had problems used a filter designed for fuel pumps, not a gravity flow system.
These work well and can be obtained at many auto parts stores: http://www.amazon.com/Visu-Filter-In...068296&sr=1-14 |
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