no spark

[jeredlee]

i have a 2004 yz 450 im not getting any spark. i put a new plug and coil timing is good and still nothing.i went through the eletrical system and it all looks good im stumped:confused: .any help would be awsome

[desert-rat660]

did u check the grounds? cdi unit?

[desert-rat660]

also check the kill switch, ive seen problems with them, a simple way to check it if u dont have an ohm meter is to unplug it. then see if u get spark

[jeredlee]

i have checked the kill switch and its good ill check the ground. were is the ground

[desert-rat660]

close to the cdi unit

[bigred455]

i have checked the kill switch and its good ill check the ground. were is the ground

Just unmount the kill switch and see if you get fire.

[jeredlee]

ok thanks ill try both and let you guys know

[jeredlee]

unpluged the kill switch and still no spark .didnt find the ground for the cdi box.do you guys think the cdi box could be bad is there a way to check that

[desert-rat660]

easiest way is too swap it. is your pickup coil good?

[shortburb]

CDIs are not a common item to go bad.

Pull the ignition cover and check the flywheel/pickup.

My flywheel came apart and gave me a no spark symptom because the pickup ridge (I dont know what its really called) was no longer passing by the pickup therefore not initiating spark.

[jeredlee]

how do you check the pick up coil

[desert-rat660]

u can ohm it out with a multimeter

[rideout743]

mine done the same thing! it is brokein now and i cant fegger out what is on the go!

i have a 04 yamaha yz450f and the other day it stoped working, it had no

spark from the spark plug so i got a new plug and now it has a good plug in it and it still wont start. i cant kick it over it wont start, i

cant pick it up by toeing it behind my dads truck. it has loads of compretion and i checked the timeimg chain and

stator and it is all good. when i to toe it behind dads truck it makes this low sound and is almost like

it wont take aney gass cause it dont realy move. aneyone have aney advice? i am realy stumped... ?

[jeredlee]

i still cant find out whats wrong i think i might have to take it to the shop

[desert-rat660]

try disconnected the kill switch, if it fires up then u know the kill switch is bad

[arnego2]

Hi there

mine, a 2006 YZ450F went out quitely and after changing the plug without results we checked the stator which gives off energy so there are only a few items remaining. The CDI or the ignition coil, well the wiring too I suppose.

Lets hope that tomorrow I know more.

regards

Arnego2

[arnego2]

Hello there

In my case it was the stator, well at least they have it here in the country. Soon I can ? again on the YZ450F

regards

Arnego2

[jeredlee]

what is the stator and were is it at i looked in manual and didnt see anything called that:confused:

[arnego2]

Hello

here you can see one: its below the oil fill screw.

M-f-G

Arnego2

[grayracer513]

The manual refers to it as the magneto. Test is on page 6-8.