Yamaha 2005 Raptor 80 Logo

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Anonymous Posted on Aug 05, 2017

Raptor 80 fuel leak

Fuel is leaking from line that connects to carburetor. The line looks like it's an overflow/drain line, but also looks like it may connect back to carb (I see a nipple that fuel bubbles from when I open throttle), but the ID of the fuel line is too small to fit over the nipple. It might require another connector piece. I'm looking for a schematic to see if an how the fuel line is connected.

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Steve P

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  • Yamaha Master 3,912 Answers
  • Posted on Aug 08, 2017
Steve P
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Sounds like its time for a float level adjustment - BETTER YET - complete carb cleaning and setting by a qualified professional...

5 Related Answers

tombones

  • 3567 Answers
  • Posted on Apr 23, 2009

SOURCE: Fuel Leak from the Carburetor

Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Check the float as they can go bad and fill with gas such that they no longer float. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. The idle speed will probably different so adjust the idle screw to get back to where it was. This process should get you back on the road.

Please rate this solution. Thanks!

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tombones

  • 3567 Answers
  • Posted on May 22, 2009

SOURCE: Fuel leak where fuel tube goes into carb.

Turn the petcock valve off and the flow should stop. If the fuel line is long enough, cut the broken line just above the break then re-attach to the nipple.

mbm250r

mike

  • 112 Answers
  • Posted on Jun 28, 2009

SOURCE: raptor 350, gears slip at full throttle. Is there an adjustment

sounds like you need a new clutch. but first make sure that your clutch cable is'nt too tight. it should have a little bit of freeplay when you pull the lever.

Anonymous

  • 636 Answers
  • Posted on Jul 26, 2009

SOURCE: Fuel leaking from carb vent tube on newly cleaned carburetor

that would be either the float set to high or the needle and seat is missing an o-ring while you had it apart. Should look at getting a carb kit there only approx. 23 bucks and it would save you a lot of grief in the long run.

Anonymous

  • 86 Answers
  • Posted on Apr 01, 2010

SOURCE: 2004 yamaha raptor carb removal

they are not serviceable thats why you take it to a machine shop and they can change it and make it upgradeable

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2005 Yamaha Bruin 350 ATV. What will cause my ATV not to run? Gas is coming from drain tube?

Question edited for clarity.
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Turning over has nothing to do with the carburetor! Your battery is flat. It will need charging.

If the carb is leaking, it is because the float is set wrong or the float valve needle isn't seating properly.

Engines only need three things to run.

A supply of clean fresh fuel (not sitting a year)
A Spark at the right time.
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You say you cleaned the carb **in** carb cleaner, as opposed to *with* carb cleaner. Did you strip it down, check the float for holes, clean the jets and needles?
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What all can cause gas to run out the carb overflow line.

There is a bunch of things including, Hole in float, Dirty gas has left deposits on the needle and doesn't allow a complete shutoff, A damaged needle or seat, If carburetor has been taken off the float setting could be off, gas breaking down leaving a deposit on the needle or seat. Usually can be cured with a good cleaning and a new needle and seat. Check float to be sure it doesn't have a hole in it. If using 10% ETHANOL. fuel the fuel can be damaging your carburetor. I have had it eat a hole in the bottom of one of my carburetors so it does happen. I do not use ethanol fuel in any of my 4x4's anymore. May be more but good cleaning is needed.
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Helpme!

Check for spark at spark plugs then check fuel and fuel filter .

Troubleshooting a small Petrol engine that won't start requires a series of short tests and the process of elimination.
Understanding the principles of how a small engine operates is helpful but not necessary.
Proper disposal of hazardous liquids will be required.
The knowledge gained in the performance of this procedure can be applied to many different types and sizes of internal combustion engines.
The average weekend mechanic can complete the process in about an hour.
Put on the safety glasses.
Remove the gas cap and check that there is gas in the fuel tank.
Look at the inline gas cutoff valve located below the gas tank on the fuel line and make sure it is in the on position, with the knob turned straight in line with the fuel line.
Look at the spark plug and check that the wire is securely plugged onto the plug.
Try to turn the spark plug by hand and make sure it is screwed firmly into the hole.
Look at the ground strap by the spark plug and make sure it is not touching the spark plug.
Look at the kill switch located by the controls and make sure it is in the run position.


Remove the air filter by unsnapping its box-like cover or removing the wing nut that holds it onto the carburetor.
Lift the air filter out of the holder and set it aside.
Spray a shot of starting fluid from the aerosol can into the empty air filter area of the carburetor and try to start the engine.
Let the engine run about 30 seconds or until it dies.

Eliminate the electrical system as the cause of the problem if the engine started right up, ran a few moments, and quit.
Remove the gas line from the carburetor by loosening its hose clamp with the screwdriver kit.
Hold the fuel line over the clear glass container and let some gas run into it.
Look at the gas, checking for water and impurities.

Drain the gas tank if the gas looked impure.
Remove the gas filter from the fuel line by loosening its hose clamps with the screwdriver kit.
Replace the gas filter with a new one if the gas did not run into the glass at a rapid pace.
Reinstall the gas line and gas filter.
Fill the gas tank with new gas.

Find a small drain bolt located on the very bottom middle of the carburetor.
Place a small container that gas won't melt under it and remove it with the wrench kit.
Let the old gas drain out of the bottom until the new gas starts to flow out. Screw the drain bolt back into the bottom of the carburetor.

Clean up any spilled gas off the motor and elsewhere with the shop rag.
Place the rag in the metal bucket a safe distance from the work area.
Clean the air filter with warm, soapy water if it is the spongy type, or replace it with a new one.
Install the air filter. Start the engine.

Unplug the spark plug wire from the spark plug if the engine did not start.
Hold the insulated part of the spark plug wire with one hand and place the bare part about 1/4 inch away from the top of the spark plug.

Try to start the engine and watch for a spark between the wire and the plug. Replace the spark plug wire with a new one if it shocked you through the insulation.
Remove the spark plug using the spark plug wrench and replace it with a new one if there was a spark.
Try to start the engine. Let the engine run until it performs smoothly.

Do not do anything else if there was no spark, as the trouble is inside the internal workings of the engine and requires professional repair and tools.
http://www.popularmechanics.com/cars/how-to/maintenance/1272351?click=main_sr
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