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2000 Yamaha YZ 80 poor idling

My yz80 2000 (47mm bore) doesn't idle rite, it either idles to high or so low that it stalls. i haven't really tryed much just played around with the air/fuel screw, the idle screw and added a little more oil to the fuel (from 32:1 to about 38:1). any ideas?

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  • Yamaha Master
  • 58,679 Answers

Hi, Shaundavies6 and the usual suspects are:
1. Idle speed improperly adjusted.
2. Air fuel mixture screws not properly adjusted.
3. Inlet system air leak.
4. Leaking accelerator pump.
5. Loose low-speed jet.
6. Plugged low-speed jet.
7. Contaminated or plugged low-speed circuit.
8. Enrichner valve/choke not seated or leaking.
9. Multi carburetors out of sync and need to be balanced.
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.
Yz 80 2001 model Carburetor tunning Trouble
Life On 2 Wheels
Yamaha YZ80 service manual repair 2001 YZ 80 YZ80LW Download Manuals... $8 cheap
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on May 29, 2017

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6 Suggested Answers

6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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  • 2336 Answers

SOURCE: High Idle on a 2007 Night train

The engine needs 950-1050 rpm's to properly charge the battery and supply enough oil pressure. Lowering it can effect both and is not advisable to do. There;s a small window to play with but it is better left at factory specs. As far as FI injection to carb, it can be done but at a cost and the same applies to idle speed there, just a bit more of a window because of no fuel pump drawing from the system.

Posted on Nov 20, 2008

Benimur
  • 6966 Answers

SOURCE: my hyosung will not idle then once switched off will not start

Hi and welcome to FixYa,

Initially and based on your description, this pertains to a fuel issue. Corrective action would involve not only changing the fuel but cleaning the fuel tank, the built-in fuel filter, the fuel valve, the carb. Particular attention should be given to the jets and the multiple pin holes.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 29, 2008

  • 86 Answers

SOURCE: 2005 ktm 520 won't idle, cleaned carb new diaphram

did you try adjusting the air fuel mix screw?

Posted on May 21, 2009

SOURCE: Yamaha DT 125 1986 - High Revs when idling

i would say the answer from polar cycle is good...but if it is not the case....you may take a look at crankshaft seal..sometimes the primary compression is not good if cranks seal leaks and it make the bike running lean in gaz and having you're idle getting up sometimes.........check the transmission oil if its low in quantity even after replacing it recently (this means that you're transmission oil is getting burn by you're motor) and also remove the magneto cover to see if there is gaz accumulation in that area...if so that means the seal leaks on the magneto side.....

Posted on Aug 15, 2009

Testimonial: "After finally rebuilding the carbs and replacing the reeds and air filter, the problem was actually solved by replacing the crank seal. "

  • 1 Answer

SOURCE: 83 suziki GS450 idle issues

the problem with the rubber was close but on the gs450 there is a metal insert that even if the rubber was rotted away the metal seals aginst the head so it cant leak. the problem is on the gs 450 suzuki used a cheap throttle cable that kinks behind the gas tank and kinks at the bend to the crabs under the set and the throttle system is a pull only not a dual cable pull push to always close the throttle. if you start the bike a wiggle the bend in the cable that comes out from the twist grip you will see it changes the idle. with either your finger or a screw driver and push the plate down on the carbs that the cable connects too. if the idle drops this conforms your problem. order a new cable from dennis kirk they have the revised one that has metal adjustment screw and metal clip in. better jacket casing as well.

Posted on Sep 29, 2009

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1 Answer

What would cause 99 r1 to idle rough when warm


Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Air fuel mixture screws not properly adjusted.
3. Inlet system air leak.
4. Leaking accelerator pump.
5. Loose low-speed jet.
6. Plugged low-speed jet.
7. Contaminated or plugged low-speed circuit.
8. Enrichner valve/choke not seated or leaking.
9. Multi carburetors out of sync and need to be balanced.
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.
http://www.r1-forum.com/forums/104-04-06-r1-mechanical-help/333978-rough-idle-knocking-engine-cutting.html
Stalling rough idle when hot Suzuki GSX Motorcycle Forums Gixxer com
1998 1999 Yamaha YZF R1 Service Manual R1 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 19, 2014 | Yamaha YZF-R1 Motorcycles

1 Answer

Why does my r1 start but shut off?


Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Air fuel mixture screws not properly adjusted.
3. Inlet system air leak.
4. Leaking accelerator pump.
5. Loose low-speed jet.
6. Plugged low-speed jet.
7. Contaminated or plugged low-speed circuit.
8. Enrichner valve/choke not seated or leaking.
9. Multi carburetors out of sync and need to be balanced.
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.
07 R1 starts but doesnt stay running
2007 2008 Yamaha R1 Stalling Problem Fix How to
2000 2001 Yamaha YZF R1 Service Manual R1 Moto Data Project
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Apr 03, 2014 | 2000 Yamaha YZF-R1

2 Answers

Does high idle consumes more gas??


obviously does, more RPM needs more gas

Mar 14, 2013 | Cars & Trucks

1 Answer

Car engine idles really high then really low, why?


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------

Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------

1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------

Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------

Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------

Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

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http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Feb 15, 2013 | 2003 Pontiac Grand Am

1 Answer

Problems with stalling at low speeds and not idling well


Hi, Jonathan and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals
OEM parts for Yamaha
2001 2013 Yamaha YZ 250 Service Manual YZ250 Moto Data Project
YZ250F terrible low end bog stutter Intake Jetting Fuel Injection
Dirt Rider Magazine

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Jan 02, 2012 | 2005 Yamaha yZ 250 F

1 Answer

Excessive stalling at low speeds on 2005 yamaha yz250 f


Hi, Jonathan and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Dirt Rider Magazine
YZ250F terrible low end bog stutter Intake Jetting Fuel Injection
2001 2013 Yamaha YZ 250 Service Manual YZ250 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Jan 02, 2012 | 2005 Yamaha yZ 250 F

1 Answer

I have a 2001 yamaha r1 will idle fine 1500 or higher lower it quits trying to find out where idle mixture screws are suppose to be set at has k&n air filter and yoshimura rs3 slip on was told it was...


Hi, Kris and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
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.
http://www.r1-forum.com/forums/102-00-01-r1-mechanical-help/332148-2001-r1-dying-help-high-idle-clutch-jerking-whats-going.html
High idle problem
2000 2001 Yamaha YZF R1 Service Manual R1 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 01, 2011 | 2001 Yamaha YZF-R1

1 Answer

AFTER RIDINIG MY O4 YZ450 FOR OVER 30 MINUTES IT SEEMS TO IDLE HIGHER WHATS WRONG IS IT GETTING TO HOT I DONT HERE ANY BUBBLING FROM MY RADIATOR


Once something has heated up like this it usually does idle higher... just start it when its cold and set idle really low so its not idling high then when it heats up it will idle higher but not too high if you get what im saying.... best of luck

Mar 01, 2011 | 2004 Yamaha YZ 450 F

1 Answer

Hey Guys I have a 2001 Yamaha yz 250 f it idles high and goes to a low idle then dies. I restart it idle it high to warm it up but does the same thing, The pipe gets red then i shut it down.Anyone know...


check for vac leck at the carb. start the bike and take some carb spray and spray around the carb and carb boot. let me know what happens.
Mark
C.C. Motorsports

Mar 14, 2010 | 2003 Yamaha YZ 250 F

1 Answer

Idles real high then dies and gets pipe red hot.


Sounds like you have too much fuel entering the engine .check the spark plug and see what colour it is .it should be a brownish pink .

Mar 14, 2010 | 2003 Yamaha YZ 250 F

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