Question about 2004 Yamaha YZ 450 F

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My yamaha 450YFZ is idling too high how do i lower the idle speed

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There is an idle screw on the carborator. Turn it clockwise. It doesn't have to be turned very far.

Posted on Sep 29, 2010

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Ryobi 725r trimmer carburetor adjustment


Turn both low and high adjustment screws carefully clockwise all the way in - do not overtighten.. Then back out each two full turns. Set the idle speed control for highest setting. Prime and start and let it run and warm up for about 15 seconds - then lower the rpms a tad and then adjust the low end screw for highest rpm. Then reset the idle to lower reasonable level. You may have to go back and forth with those two adjustments till it runs fine at low idle speed..

Then accelerate to highest speed and set the high adjustment for highest rpm. Then go from idle to high speed. If not smooth a small adjustment on the high speed screw is in order. Keep doing that until you get a nice smooth transition form low speed to high speed.

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Yamaha Stryker is idling hi


Hi, Shana you may have a faulty Throttle Position Sensor or Idle Air Control Valve or pesky intake leak for more information about your question and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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1 Answer

How to adjust the carbuetor on a 2001 yamaha 250?


The idle air screw is on the side of carb. the high speed requires a special 90 degree screwdriver. This allows access to the high speed jet which is on the bottom of carb...Adjust idle screw till smooth idle is obtained. Adjust high speed while running to obtain the highest RPM.

Jul 17, 2014 | Mikuni Motorcycles

1 Answer

1985 maxim x 700 has trouble starting sometimes and wants to idle at 4000 rpm or stalls when adjusted, just rebuilt the carburetor still won't idle correctly


Hi, Dlmninja 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.
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.
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Jul 21, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

My 1995 Yamaha XV535 will not idle properly. I've


Hi, Jerry 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.
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May 25, 2011 | 1995 Yamaha XV 535 Virago DX

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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
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2000 2001 Yamaha YZF R1 Service Manual R1 Moto Data Project
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

May 01, 2011 | 2001 Yamaha YZF-R1

1 Answer

97 yamaha 600r at idle the rpms slowly drop insted of a sharp drop when throttle is let off thinking the jets maybe stopped up or has a fuel return issue, or the carbs are not in sync. thanks


Hi, Etka2800 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.
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1 Answer

2000 Yamaha YZ 80 poor idling


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.
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Oct 24, 2010 | Yamaha Motorcycles

1 Answer

2000 Yamaha V star Classic 1100; Once it warms up, tends to backfire a bit and overrevs in low gear (very high idle). What should be the cause of the high idle.


The idle is set too high. Check on the left side of the engine, about mid point of the jugs "V", you should see a knob near the middle. Turn it R/L until the idle lowers. (slowly!) (only AFTER it has warmed up.

Aug 21, 2010 | 2000 Yamaha V Star 1100 Classic

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