February 22nd, 2014, 11:44 AM | #1 |
ninjette.org sage
Name: bob
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Fuel tap question and bike surging
Okay so I just got my new petcock in the mail since the old one had a bad vacuum nipple that came out when doing simple maintenance. The screw on one side is missing the plastic washer that connects the tap to the gas tank. Should I order a new washer or just find the equivalent at lowes?
I had some surging issues maybe a month ago after the bike sat for about 10 days but was cleared up by some fresh gas so I just assumed it was water in the tank. The surging issues around 6000rpm are back so I've drained the tank completely and was considering just adding seafoam by itself at first just to make sure the carbs are clear. It sat for almost a month this time but I stabilized the fuel with seafoam. It will rev smooth in neutral past mid rpms but not when in gear. Could it be the idle/pilot jets even though I stabilized the fuel? |
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February 22nd, 2014, 12:19 PM | #2 | |
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There is a gasket between the petcock and the tank. You added something to the fuel, but the fuel that remained in the bowls soon evaporated (the bowls breath to the atmosphere), leaving the non-volatile gunk behind. It is not much, but enough to clog the very narrow passages of the jets. Fresh fuel struggling to flow through those will dissolve that gunk, but it needs time while you will have precary engine performance. The best preventive practice is running the bowls dry before any extended inactive time. Rather than doing surgery, I would try going for a marginal 20 miles ride first. Adding some Seafoam to the fuel would help.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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February 22nd, 2014, 12:34 PM | #3 |
ninjette.org sage
Name: bob
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Here's the washer. The other side just had a ripped O-ring but it didn't leak as far as I know. These washers are supposed to be coated in something to protect them from gas. I'm wondering if I can just pickup a set somewhere local so I don't have to wait for partzilla to ship them to me since they forgot them.
Okay ill see if more riding and seafoam will clear things up. |
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February 22nd, 2014, 12:45 PM | #4 | |
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Here you have some ideas for improvisation: http://www.advrider.com/forums/showthread.php?t=627031 These materials are excellent to resist gasoline action: Neoprene, Buna-N Nitrile, PVC, Neoflon®, Viton®, Fluorel®, Urethane and Nylon.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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February 22nd, 2014, 01:24 PM | #5 | |
ninjette.org sage
Name: bob
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Quote:
Found the washer at lowes that's almost identical and nylon. Ran seafoam right into the fuel line and let run for a bit. Added some fresh gas then took it for a ride. Mid rpms are still not there so it looks like surgery on the carbs may be inevitable. Last futzed with by agentbad; February 22nd, 2014 at 03:52 PM. |
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February 22nd, 2014, 05:22 PM | #6 |
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Name: Justin
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I have yet to see seafoam do a darn thing other than on youtube videos.
I wouldn't be surprised if some crap got into your bowls. Check your fuel filter and flow rate if you want better peace of mind.
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February 22nd, 2014, 05:38 PM | #7 | |
ninjette.org sage
Name: bob
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I'm tempted to buy another used set of carbs or just say screw it and go EFI. |
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February 22nd, 2014, 05:45 PM | #8 | |
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Guys at the local watering hole actually think I do small motor repair for a living: good for many free beers. |
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2 out of 2 members found this post helpful. |
February 22nd, 2014, 06:00 PM | #9 | |
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One turn is 360 degrees. All you want to know about your carbs is here: http://faq.ninja250.org/wiki/Intake Again, this is the rule of thumb: the problem usually is in the last thing that changed / the less you assume and change the less variables to drive you crazy.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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February 23rd, 2014, 02:44 PM | #10 | |
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Main jet threads seems to stick out a little is that normal. Threads look fine in the carb and on the jets just wanted to make sure. http://i.imgur.com/cO5nEHU.jpg |
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February 23rd, 2014, 04:06 PM | #11 | |
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The thread that you see belongs to the emulsifier tube. Please, read this: http://www.ninjette.org/forums/showt...light=passages
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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February 23rd, 2014, 04:13 PM | #12 |
ninjette.org sage
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Fixed it! Cleaned the carbs as best I could then reattached everything and made sure everything was on tight. I got worried when the bowls took a second to fill up but they did. Took her for a spin around the neighborhood and holy **** the smile it put on my face. Smooth as silk. Laundry will have to wait.
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February 23rd, 2014, 05:20 PM | #13 |
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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February 23rd, 2014, 05:28 PM | #14 | |
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But get the laundry going. You can ride while the washer (and/or dryer) is doing the work. |
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February 24th, 2014, 08:23 AM | #15 |
ninjette.org sage
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Okay another small issue this morning. It was a bit cold out so I turned the choke on and let the bike warm up for a bit. As I was throwing on my gear the bike suddenly stalled. I was able to get it going again by giving it throttle. On the way to work it kept trying to stall at lights but staying on the throttle again kept it running. Once I got on the highway I left the choke on to maybe clear out what was ever causing the issue and once I got to work it would idle fine without choke. The enricher circuit was actually clean when I pulled the carbs so I'm a bit baffled what's going on. Right now the idle screws are 2.5 turns out so should I try 3 turns out since I run 112 mains and 40 pilots? Bike is running great otherwise.
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February 24th, 2014, 08:33 AM | #16 | |
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Idle speed is 1300 hot? Gas is fresh and tank is kept pretty full most of the time? |
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February 24th, 2014, 08:42 AM | #17 |
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February 24th, 2014, 08:45 AM | #18 |
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February 24th, 2014, 08:58 AM | #19 |
ninjette.org sage
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February 24th, 2014, 09:28 AM | #20 | |
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Overall it's a good idea to stay away from ethanol in gas if you can. A completely stock cycle will probably run better (slightly richer) with ethanol-free gas. One that has been tuned properly for gas with ethanol might need slight tuning when going to ethanol-free. |
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February 24th, 2014, 09:44 AM | #21 | |
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February 24th, 2014, 10:13 AM | #22 | |
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Quote:
In my case the problem is mostly my fault, as my bike tends to sit during the week since I carpool to work, and the pilot jets and idle circuit really don't enjoy that. If I leave the choke fully engaged when I start out, it tries to either surge or die depending on the temperature. My fix is to just get my gear on first, start it up with the choke and ride off sedately, turn off the choke, and keep it alive at the first few lights with very light throttle. After a few minutes of riding it will idle happily. It's not the most satisfactory solution, but it works well enough. |
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February 24th, 2014, 10:23 AM | #23 |
ninjette.org member
Name: Richard
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Surging
Surging in the 6-8k range during colder temps is not an issue that can be solved with an idle mixture adjustment. This is a function of the metering needle in the throttle slide. I noticed this happening when temps got below 50 degrees or so. Some good info can be found here.
http://www.factorypro.com/tech/tech_...m_engines.html And here. http://faq.ninja250.org/wiki/How_to_...e_your_jetting Also, when "going through" your carbs replace the inlet needles and set the float levels CORRECTLY! A simple "upside down" float setting will get you close, but not fully accurate. Float levels must be checked "wet" with fuel in the bowls, carbs off the bike in some sort of stand with an external fuel supply. Pain in the butt, but worth the effort considering what it takes to remove and reinstall the carbs. Regarding inlet needles (float valves), the OEM parts are about $35 each. K&L parts 18-8953 (Needles, 6 pack), 18-2676 (Bowl Gaskets, 4 pack) can be found at http://www.mcmcycleparts.com/store/ for less than the cost of 2 inlet needles. The reason for replacing the needles is that the dampening spring in the needle gets weak over time. Also, go to Ebay and look for the service manual on CD for your bike. This will show you how to properly set the fuel level in the carbs. |
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February 24th, 2014, 10:26 AM | #24 | ||
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