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I have a 2012 yamaha yz450 that starts up and runs for maybe 2 minutes then dies every time does it need air filter box on to keep running or is there something electrical going on

Engine was removed and put on different frame but now it won't stay running

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Check all electrical connections,check fuel filter!

Posted on Jan 24, 2013

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Fuel problems

Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
Re Bike will not idle with out choke Road Star Forum Yamaha Road Star
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Apr 23, 2014 | 2008 Yamaha Royal Star Venture

1 Answer

2001 Yamaha TTR90 hard to start cold

My guess would be that you have dried out seals/gaskets taking away from the overall compression. This will either get better with use as everything lubes up or you will have to replace all that are leaking.

Mar 18, 2014 | Motorcycles

1 Answer

2003 yz450f popping on deacceleration too lean

wots the colour of the plug after its had a good run? is the exhaust gasket on the head leaking as this can cause this ? have you coated the air filter with a film of oil as this is required and also stops dirt passing through it ? correct spark plug and gap ? timing set correctly ?

Nov 21, 2013 | Yamaha 2003 Yz450f Yz450 Yz Wr 450 Stator...

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I Think Your Problem Is Still With The Fuel Supply,Have You Changed all Fuel Filters,Follow All The Fuel Lines Make Sure There Are No Kinked Fuel Hoses,Some Times You Find Small Filters In The Top Of The Fuel Injectors.
Hope This Helps

Apr 06, 2013 | 1995 Pontiac Trans Sport

1 Answer

My 1998 dodge caravan won't stay running. starts up but shuts down instantantly or when i take my foot off the gas pedal,

ok i have a 1998 durango with the 5.2L 318 engine. had trouble with a bad cell in my battery. I went out bought an optima red top battery for it 800cca. put it in and had same trouble. No start without putting foot on gas. wouldn't stay running without holding foot on gas. CPU has to relearn it's programming once you unplug it for long periods of time. mine was without power for about 2-3 weeks till i got new battery. Start with this.. first check under air filter make sure a squirrel hasn't made a mess under your air filter and it's clogging the air intake. Then pull off the lid to your injector cover ( the screw down lid coming from the air box ( with air filter in it) to "carb") make sure all your cables move freely. put that all back together and close hood. Start truck with foot slightly on gas pedal to get started. keep it at about 1k to 1500 rpm for about 1-2 minutes. Rev motor to about 2500rpm and let it die out if it will. Get out lock doors with key fob if you have it. if not make sure to lock doors. ( trust me it worked for me) let sit for 5 minutes. come back out and unlock door and relock door 3 times with fob ( if you have it ) or key if you don't have a fob. Then unlock it with the key and enter vehicle. Start truck as before and keep it around 1k to 1500 rpm again for about 30 seconds rev it up and should keep running. Mine did. I think the iac was stuck from sitting and has now since loosened up.
Good luck hope ti works for you.

Jun 05, 2012 | 1998 Dodge Caravan

1 Answer

2006 fz 600 starts runs fine for a minute or two then dies

You need to check when problem accures check fuel flow then and check spark maybe first , if it takes awhile to start maybe crank angle sensor

Apr 08, 2012 | 2006 Yamaha FZ6

1 Answer

I have a GMC 2300w AVR generator which is pull start. it starts, runs for a min or two then cuts out..have clean fuel filter, air filter, spark plug, what else could it still cuts out without...

Do you maybe have regular gas in it? Both Canadian and US regular gas now have ethanol in them and if the generator has sat for 2 weeks or longer then the gas is bad.Remove the gas tank and look inside. You will probably see an off-color blob floating around in the bottom. That is our wonderful environment friendly ethanol doing what it does best. Drain the tank and refill with premium. Restart the engine and do what you need to keep it running for about 5 minutes. If it has the plunger primer for cold start, use it every time the engine starts to die, 2-3 pumps each time. If not dribble a little gas into the breather to keep it going. After about 5 minutes it should start running on it's own. If not you will likely have to remove the carb and get the rubber seals replaced. Ethanol and rubber don't mix well.

After this keep premium gas in all your small engines. It doesn't separate. If you want to keep using regular gas then there are additives in the after market that will help keep it from separating. Hope this helps.

Sep 10, 2011 | GMC C2500 Cars & Trucks

1 Answer

My yamaha tzr 250 runs for just a few minutes and the engine dies out.and when i try to start will only run again after a few minutes of rest....

Check your fuel lines and filters. If these are dirty then maybe the fuel is restricted so when you rest the bike the carbs will refill.

Aug 26, 2009 | 1990 Yamaha TZR 250

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