Question about 2002 Yamaha YZ 426 F

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My Yz 426F and it won`t start at all, changed the plug and it still won`t start

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HELLO; Now, pull the plug out reinstall it on the ing. cable and short it out on the head while cranking the motor over ,look for a nice crisp spark. If you have one, check for fuel flow from your tank to the carb. Check that and if nothing, write back and we will go from there. GOOD LUCK.

Posted on Oct 01, 2009

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Hello, I have a 2002 Yamaha 426f and recently changed the oil and filter, I noticed that there was a small amount of metal shaving in the filter, bike has approx. 400 miles on it, is the motor headed for...

That is what an oil filter is for. Some people fit magnetic sump plugs to catch the bits of metal that drop into the bottom of the sump.
Don't worry, it's normal.

Aug 04, 2011 | 2002 Yamaha YZ 426 F

1 Answer

I have a problem with my yamaha yz 426f, i just get it from a mechanic after complete rebuild (new piston, bearings...everything in a machine) the compresion is very strong because engine didnt run even 5...

Bring it back .. work should be under warranty of some sort. Also if the engine is running but stalling due to fouled plug then maybe the oil injector is not adjusted properly or the oil/fuel mix is not right for some reason.

Dec 22, 2010 | 2001 Yamaha YZ 426 F

2 Answers

My 2002 yz 426f wont idle

If the service and tune-up basics have been covered (especially valve clearance, spark plug, filters) you may have crud in the carb pilot circuit. You can save time and skip the battery service since it doesn't have one.

Jan 29, 2010 | 2002 Yamaha YZ 426 F

1 Answer

What are the valve clearence specifications on a 2001 yamaha yz 426f?

1/1000 inch : inlet= 6-8 cold exaust= 10-12 cold. hope this gets u outta trouble AJ.

Nov 10, 2009 | 2002 Yamaha YZ 426 F

1 Answer

2002 yz 426f has a slight miss fire in 5th gear only have tried plug,leed,cap,fuel and cleaned the carb out

maybe could be lack of fuel at top end on carb will be a screw the mixture screw you need just fiddle with it till it runs ok if it makes no difference get back to me 362ba0b.jpg

Oct 24, 2009 | 2002 Yamaha YZ 426 F

1 Answer

Is there a drain plug for the water pump on a 2000 yz 426f. I want to drain the system, and change it to engine ice. I don't know if there is a plug or if you have to take the pump off

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Jan 01, 2009 | 2002 Yamaha YZ 426 F

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