Question about Yamaha YZ 250 Motorcycles

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Is there a way to check the CDI box on 2007 yz250 2-stroke?

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Pull out the spark plug and kick it, if the plug sparks its working. they either do or dont, it wont ever be "out of adjustment" or intermittant.

Posted on Aug 23, 2010

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Posted on Jan 02, 2017

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Do you have a wiring diagram for a Yamaha 1300, 2007 model. I have one plug not firing I need help!!


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
2007 FJR1300 Low speed misfire
Yamaha 1300 Tourer Yamaha 1300 Tourer Fansite
YAMAHA FJR1300 2006 2007 REPAIR SERVICE MANUAL DOWNLOAD Download Manuals...
OEM parts for Yamaha
https://www.yamahamotorsports.com/assets/service/manuals/2008/LIT-11626-21-63_FJR1300A_1543.pdf

May 02, 2014 | 2007 Yamaha FJR 1300 A

1 Answer

No spark on 110cc chopper four stroke what wire is for the spark


The blue with white stripe will go from stator to cdi box. Then black with yellow stripe goes from cdi box to coil will give you spark. If u have no spark and u u haven't changed cdi box or checked coil I'm going to bet that's ur problem. Hope this helps.

Apr 13, 2014 | Golden Technologies Companion II Travel...

1 Answer

How do i change a cdi 125 top end


A CDI is the BRAIN BOX, all you have to do is Un plug it, Unbolt it and install the new Box

Apr 06, 2013 | Pit Bike 125cc 4 Stroke Dirt Bike

1 Answer

02 yz 250 not reving up


Check the compression. It should have at least 100 psi,..if not,then its time to rebuild the top end..IE piston,rings,bore cylinder. If compression checks out,i would start with the power valve. Two stroke dirtbikes power valves are notorius for gumming up and sticking,causing them to not rev correctly.

Aug 31, 2012 | 2003 Yamaha YZ 250

1 Answer

Would a cdi box cause a 2003 yz 250 to miss fire


Not likely. would cause it to not run. you if this is a 2 stroke you may need to adjust your oil mixture. manual says 30;1 But 40:1 is much better.

Jan 15, 2011 | 2003 Yamaha YZ 250

1 Answer

Where do you find the spark plug and CDI on a 50cc Chongqing Bashan scooter? And how do you replace the sparkplug and CDI?


The spark plug is located on the cylinder head of the engine. Look for a really thick wire from the ignition coil. The plug is on the other end. Your plug, if a four stroke engine, is a CR7HSA, which takes a 5/8 deep well socket to remove. The CDI is a black box, sometimes in the battery box, most often under the seat bucket after its removed.

Nov 23, 2009 | RTO Gas Motor Scooter

2 Answers

Fuse box chart for ml 320 cdi


hi,main fuse box or e-box is located in right side,standing in front of your car,you can use the remover for busted fuse,some ml model one fuse is under the fuse box(cdi management)ty

Mar 26, 2009 | 2007 Mercedes-Benz ML320 CDI

2 Answers

Backfire


the bike will like backfire/misfire and if i hold the throttle steady it will backfire like 2 times again....and it does this while riding at a steady pace too...it just started it didint do it a week ago. i didnt change anything except a new air filter..fuel screw is 2.5 turns out . the timing valve clearances and everything is in spec. is this a sympton of it being rich or lean? and it doesnt do it on chokeYes, it could (and probably is) be an air leak. Check to be sure the carb is tight in the intake manifold, and make sure the hot-start isn't loose and is sealing properly. Also make sure all of the exhaust system joints are tight, an air leak in the exhaust will make a four-stroke pop and backfire like an old work truck with no muffler...,,,

Nov 10, 2008 | 2002 TM Racing Mx 530

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