2004 Derbi Senda SM 125 4T Logo

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Anonymous
Anonymous Posted on Dec 02, 2010
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Im having a small problem with the tank no air is gettin inside which means that as the fuel goes down it creates like a vacum making it imposible for the petrol to constantly flow, does any1 kno if this bike is ment to have some kind of tube to pass air into the tank? ...

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  • Anonymous Dec 02, 2010

    sorry i have no credit card :/

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Anonymous

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  • Master 2,702 Answers
  • Posted on Dec 02, 2010
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The fule tank has a vent pipe fitted in it if the pipe is blocked or traped this is causing the fault

  • Anonymous Dec 02, 2010

    so what,,,just fix your bike,,,if iv help you out thats ok with me,

  • Anonymous Dec 02, 2010

    so what,,,just fix your bike,,,if iv help you out thats ok with me,

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No start ran out of fuel ran the battrie died put fuel in and bosted it no start
What do you mean "no start"?
Did you hear the starter-motor spin the engine?
If so, did it not ignite the fuel, and start the normal operation (pistons going up-and-down, crankshaft-turning, fuel being consumed)?
Or, did it not "catch" (spin the crankshaft, but no ignition of the fuel)?

Did you create an air-lock (air trapped inside the gasoline line that goes from the gas-tank to the fuel-injection system) ?
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May 20, 2014 • Depo Buick Lacrosse 05-07 Buick Alure...
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Fuel line routing for ryobi,poulan and sears trimmers
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.hello sir,routing fuel line for craftsman,homelite, trimmers,fuel tank over engine, looking at machine from rear, shall fuel line on left with filter attached goes to bottom port of carburetor fuel line from right side coming out of tank with inside tip attached goes to bottom port of primmer bulb,top line on primmer bulb goes to top port of carburetor fuel tank under engine,fuel line routing,looking at machine from left side, left fuel line coming out of tank(drain back only) goes to right side small port of primmer bulb, left side larger fuel line from primmer bulb to top port of carburetor fuel line coming out of tank (larger line) on the right side with filter attached goes to bottom port of carburetor when replacing fuel line it is very important to use the same ID and OD line,when the lines dissolve small pieces will get in the carburetor clogging small passages and screen,it is advisable that you clean out carburetor and use a new filter.hope this helps, DON'T FORGET THE 4 THUMBS UP,,,,any comments welcome,thank you.
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on Feb 27, 2010 • Garden
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Homelite leaf blower fuel tank pickup fell off
There should be something going into the tank, a plastic elbow or connector, that will connect the fuel line from the carb to the pick up in the tank. Generally what I do is remove what ever goes into the tank and get a piece of fuel line slightly bigger than the hole and insert the fuel line directly from the carb into the tank. You have to be sure the hose is really tight so to create an air tight seal. Pull the new hose out of the tank through the fuel fill and insert the new fuel filter, push the hose back in making sure it is on the bottom of the tank but has room to move around

If you need further help, I’m available over the phone at https://www.6ya.com/expert/kelly_69a0cf1b13789df1

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Jan 22, 2013 • Homelite 308675004 Fuel Tank With Cap...
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Carb overflows when not running
Im not familier with your specific bike but here are some ideas:-

First check the float valves, these are usualy in the bottom half of the carb. Take the bottom off, and you will see a plastic float, attached to the float will be a small bullet shaped piece of metal with a rubber coan on the top (may have to remove it to see it).
Remove the float & the valve, make sure there is nothing stuck on the float valve rubber tip, and nothing is in the hole where the float valve sits.
If this looks ok, next check the float levels, you may need a Haynes manual or similar to find out specificaly how you do it as you may need measurements.
Dont panic, this is a fairly simple thing to do (trust me Im no expert), you will need to repeat this process on all the other carbs (if you have more than 1)

You can also check your vacume valve (if you have one). Its a small pipe that connects from the carbs to the peterol tank (This is an additional pipe to the fuel pipe), this creates suction when the engine is running opening the fuel tap on the tank, letting fuel flow, if the tap is stuck, or the vacume pipe is damaged this could allow fuel to flood the carbs, (shouldnt if the float valves work correctly, but worth a try)

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When it starts to die slacken off the fuel cap enough to allow air into the tank, if it picks up again it is an issue with the fuel tank breather, if the breather is blocked it will create a vacume in the tank and stop fuel flow to the carb.
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Im haveing a problem with my 2000 saturn ls2 3.0 litter i can drive it for 2 miles and then it just dies out and wont restart i have been going at this for 4 weeks know so any input would be good thanks
maybe your fuel tank vacum make sure fuel tank can breathe , what i mean if your sucking fuel to engine air has to get in or the fuel lines vacum
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Sep 04, 2011 • Saturn L-Series Cars & Trucks
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Is there a little nipple that looks like a mini in line gas filter that goes inside of gas tank where gas line goes into tank on one side and into carb on other and what is the part #
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Aug 24, 2011 • Poulan Pro 42CC 2 Cycle Chainsaw, 18"
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Gas tank creates vacume
The vent is contained in the fuel cap. Try disassembly and clean or replace. HTH
Lou
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Sep 12, 2009 • Garden
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Fuel lines need connected and im having fuel pump relay problems
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Jan 17, 2009 • 1985 Isuzu Trooper
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Engine will turn over but will not continue to run
the fuel filter is in the tank on top of petcock that bike has a vacum operated petcock(fuelvalve)if the vacum hose is bad no fuel flow check the back of the fuel valve for a small hose that goes to the manifold make sure it is good put vacum on the hose wile hooked to the fuel valve and make sure that gas runs out of the hose give me a rate please hope this helps
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2004 Senda SM 125 4T

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