Question about 2002 Yamaha YZ 426 F

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Yz hard to start

I have got a Yz 426f and it`s hard to start even when it`s been running. I`ve gone to a cr7e instead of the cr8e sparkplug,but it is still hard to start even after running.

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Posted on Oct 05, 2009

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Sparkplugs


Having trouble starting? Take out the factory supplied (cr8e) & replace with a cr8ek! Has twice the spark & halves the time it takes for your rubber leg to come right!

on Apr 25, 2009 | 2001 Yamaha YZ 426 F

1 Answer

New to the whole 4 stroke thing so I figured I'd


Hi, Duke_fan31 for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. 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.
Yamaha YZ426F Owner Service Manual
OEM parts for Yamaha
Yamaha YZ450F Owner Manual Page 3
What are the top 5 mods to get for yz426f YZ 400 426 450
Yamaha YZ 426 FN 01

Apr 18, 2012 | 2001 Yamaha YZ 426 F

1 Answer

Hi need help I've got a 2002 wr 426f but need new frame I can buy a yzf 250 2002 frame but not sure if it will fit I know ill lose my kick stand


Yes the YZ frame will work perfect.
The main difference in a WR to a YZ is the extra weight that the flywheel has on the WR's engine,other than that the bikes are about identical.
Good luck,Gary

Sep 21, 2011 | Yamaha WR 426 F Motorcycles

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

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

2 Answers

How do i start a 2001 yamaha 426 motercycle


pull trigger press crank down till it stops let it go all the way back to the top pull trigger push crank just one click then kick it down hard also keep hand off throttle hold brake cylender instead choke once then repeat unchoke should start right up

Apr 25, 2009 | 2001 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


I have a tzr 125 belgado the high beam warning light is on even when i have low beam on could the fault be in the mag or the wiring,thanks dave

Jan 01, 2009 | 2002 Yamaha YZ 426 F

3 Answers

Spark plug


have a look in the owners manual or i a workshop manual and somewere in there it will tell u the best plugs that should be put in the bike. if it continues in my experiences burnt out plugs means the engine is running to hot which means it is iver fuelling. if this is the case try turning the mixture screw down half a turn

Jan 01, 2009 | 2002 Yamaha YZ 426 F

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