Question about 2001 Yamaha YZ 426 F

1 Answer

Hello, I have a 2002 Yzf426 which refuses to start(Bought as a non runner) the previous owner told me the bike was running he stopped for 30 mins and it would not start. As a precaution i have checked and rebuilt the top end with new gaskets, the complete top end has no signs of any damage and all the parts are in great condition,cam timing is correct. I suspect the carb whilst trying to start it, i pulled out the hot start(Engine still cold) and it fired for a brief moment, is there a part that fails in these carbs?

Posted by on

  • robert stewart Mar 16, 2011

    Bike now running, turned out the pilot jet was clogged with dirt, removed all jets and blew out with compressed air 140psi, refitted and it started after a couple of kicks.
    I have now discovered there is also an art to starting these bikes, kick over with decompressor engaged for about five or six kicks,find top dead centre,take the kick start slightly past TDC,bring the kickstart back to full height, release the decompressor and kick over (No throttle).

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,267 Answers

I am speaking from my Yamaha XS1100, with 4 carburetors.It is a 1980 model, but the carburetors are always gunking up, especially if it sits over winter with gasoline in the tank. This also happens more frequently with the alcohol laced fuel that you have to buy now days. The alcohol causes it to absorb water that mixes with the gasoline and alcohol to form a sticky gunk that blocks up the orifices in the carburetors. The first thing that you can try is to get some Seafoam additive, or maybe Textron. Pour out all of the gasoline in your tank and change the inline filters if possible. Fill the tank with fresh gasoline and add the Seafoam in a generous amount. Allow the bike to sit over night and try to start it. You may get lucky and get the bike to fire up. If it runs rough and doesn't smooth out, you may have to clean your carburetor. See: http://www.bikebandit.com/houseofmotorcycles/2002-yamaha-yz426fp/o/m8901#sch252680

For a breakdown of your carb.

Posted on Mar 14, 2011

  • robert stewart Mar 18, 2011

    Now running turned out to be a blocked pilot jet, cheers for the info.

  • Norman Worley Mar 18, 2011

    I understand, I have 4 of the pilot jets that I have to clean out.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have Yamaha R15 v1. Normally my bike's radiator used to run itself after 30 min of time. But recently it has stopped working..my engine gets real hot..still it does not work..whts the prob??plea


Hi, Lazzzydevil for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
http://www.xbhp.com/talkies/do-yourself/12548-yamaha-yzf-r15-blown-fuse-replacement.html
How radiator fan working on Yamaha R15 v2 0
Yamaha YZF R15 Service Manual
OEM parts for Yamaha
Yamaha YZF R15A Owner Manual

Sep 14, 2012 | 2008 Yamaha YZF-R15

1 Answer

Bike wont start


Dead fuel in the float bowls, turn fuel tap off get a piece of thin hose connect to the drain fitting on the float bowl release drain screw on the bottom of the carbs drain each carb, top gas up with good fuel turn tap on and your off.

Jan 27, 2012 | 1996 Yamaha YZF 750 R

1 Answer

I recently bought a 2004 klx 400 sr dual sport. the bike starts up with no problems. After i ride it for a few minute the bike starts to act like it is running out of gas then stalls. it will turn...


Hello
Your running out of gas.
the fuel filter needs replaced.
your fuel filter is clogged and isn't letting a full flow of gasoline through.
change your fuel filter.

Also check to make sure your gas tank vent isn't clogged.
a clogged gas tank vent with pull a vacuum and try to **** your tank in, but it can't, so your fuel flow stops if it can't breathe.

That should take care of your problem.
have a great weekend
Big Al

May 21, 2011 | 2004 kawasaki KLX 400 SR

1 Answer

Hello i have a 2002 Honda CR80R 2 stroke Dirt bike and i bought it a couple weeks ago used for my birthday and i was fouling a crap load of plugs and the kick starter wasnt working and the powwer band was...


Kick lever will not start the motorcycle.<br /><br />I can pull it behind a car and it starts.<br /><br />Would it be the Solenoid? THe motorcycle does not have a battery.<br />It is a Beta Trials 260 Zero.<br />The previous owner said he had this problem and I thought that<br />he told me he repladced the solenoid or somethin of that nature.<br /><br />Please help.<br /><input id="gwProxy" type="hidden" /><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden" />

Jun 29, 2010 | Motorcycles

1 Answer

The engine will run for 30 mins then cut out.


How do you temporarily resolve the problem Pete?
Do you re-charge the battery or ???
Does it still crank the engine over with the electric start while in the 'failed' state after the 30 min run, just not fire the engine?
Are you doing the spark test with the electric start or kick start?

If charging the battery makes it run OK again for the the 30 mins, that is indicator the charging system is bad and you are running in 'total loss' mode of the battery. When it becomes discharged there is insufficient power to run the bike. You may still have enough power to pass a spark test if tested briefly.

If you can measure the voltage across the battery when the bike is running, that would identify whether the charging system is good - you should get at least 13.5V at the battery.
If not, you may have a stator and/or regulator/rectifier failure.

Aug 16, 2009 | 2002 Kymco Stryker 125

1 Answer

I recently purchased a 2002 vtx 1800 w/ 2400 miles on it from a friends father who never rode it. I was washing it for the 1st time and found the exhaust is melting the side of the radiator housing. It...


If the bike was not used that often,the previous owner may have started the bike in the garage,just to give the motor a run.With no air travelling over the pipes,they do get very hot.Enough to cause melting.This happens to almost any engine exhaust.(car or bike).If you run it in a garage even a household fan blowing on the pipes is enough to get rid of a lot of the heat.Hope this helps

Aug 02, 2009 | 2002 Honda VTX

1 Answer

1100 problem


I had a problem like yours and it was dirty into de carbs and in the fuel key. A good test to know if all the cilinders work is to put a wet paper or a tisue on the exhaust head of each cilinder and then you can see if they work...this is to know if the lost of power is becouse the engine doesn´t work complete...You can make this test in different revs...

Nov 20, 2008 | 1989 Suzuki GSX 1100 FJ (Katana)

1 Answer

Wont start


FIRST thing to check is spark plug ,make sure it is sparking ,if it is and is wet change the plug .If plug is dry it could be the carb needs cleaning out if it has beesn stood for a while

Nov 15, 2008 | 2004 Yamaha DT 125 R

Not finding what you are looking for?
2001 Yamaha YZ 426 F Logo

402 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...