problem with my yfz

[sct450]

i was riding the other day and it just died on me.tried to start it but it would just turn over but never fire up.checked the gas had plenty but now my battery is dead from trying to many times i guess.
if anyone could help i would appreciate it.

thank you,Scott

[53yfz450]

do you have the lights on. or did you take them off.

[2006YFZ450]

Well sounds like the YFZ headlight problem

[Pat]

Same EXACT thing happened to me...never quite figured out why.
Pat

[sct450]

lights are still on.
did you ever get running again?

[53yfz450]

1. Are you getting fuel flow out of the tank? Tried it on reserve?
2. Are you getting spark?<----no spark may be caused by alot of things.
3. If you are getting spark is it stong?<--may be a weak battery.
4. Do you have a kill switch and has it been eliminated?
5. Have you gone through the troubleshooting guide on the ignition system?

Three things I would check next.....

1. TORS switch
2. Carb switch
3. CDI

The TORS switch is on the throttle housing. It's the black insulated wire coming from the throttle body itself. The switch is the little red dot that when the throttle is in the closed position it makes contact with the switch. Make sure that's not binding up and it moves freely when the throttle is open and closed.



The carb switch is located on the shifter side of the quad tied to the frame above the carb...kinda near the fuel shut-off....it's the white plug on the left of the pic.



Try and jump out the other end of the plug with a small wire. It should be the female end of the plug and you can see two prongs inside the plug.

The CDI could be the culprit.....best thing to do is find another YFZ and try his/her CDI in your quad if possible.

One other thing to check is this little wire near the negative wire to the motor..it actually runs with the battery ground. Make sure it's not corroded or unplugged.

[trx#9]

sell that thing and get a honda!!!!!!!!!!!!!  THATS HOW YOU FIX IT 101 FROM TRX#9

[53yfz450]

speaking about honda. it may be my next quad. tired of the yammi breaking all the time.

not any time soon though.

[trx#9]

 :bow.gif

[sct450]

thanks for the info.

i was doing stoppies and flipped it over a few mins before that i'll check the wires first

[sct450]

would it be smart to take the lights off?

don't think i'll be trading for a honda no time soon

[53yfz450]

if you dont race mx then no.

[sct450]

went out there to try.battery is dead