HELP!

i took my yz125 for a ride today and i shifted with the clutch to 3rd from 2nd gear and it bogged out and the motor died today and It wont restart! What do i ***

These might be why
1. I turned it on with choke and let it idle for 15 sec. then turned choke off and let it idle for 5 sec and didnt let it warm up
2. I used octane booster
3. i am using yamalube 2s i know im not supposed too
4. i used honda hp2 gear oil Half 20w50 half 10w30 oil
5. Has been sitting with old gas
6. Ratio is too lean
7. I fouled the plug
8. the killswitch is stuck on
9. needs new top end
10. needs carb cleaned  

Fix all the things on your list  
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Stand in the place where you are, think about direction and wonder why you haven't
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lol   lol   hahhahahahahahhahaaaaa   good one  

im saying those might be the causes chud i need help  

Chud said what he did because all of those are problems! you cant mix 20-50 & 10-30? what were you thinking? drain it before you burn something up.
BEEN SITTING WITH OLD GAS you clogged a jet clean your carb

warm it up or you will cold seize it
change the plug
un plug the kill switch if you arent getting spark to see if that gets you spark
what was your ratio? unless you locked it up or holed a piston i doubt your ratios to lean
clean the carb any ways it probably has old gas in it
get a compression tester & check your top end PSI if its below 130 rebuild top end checking all clearances along the way


did you really need some one to tell you that? thats the un abridged version of what chud said
DavidS  
i take a lot of pride in what i am

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ride: 02yz426
local: north east Oregon

terrain type woods with lots of roots & rocks

im with sanders  
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1998 cr125
its better to own nothing worldly and still have your identity
then have the world and no identity
---------------------------------------"We were born of the night. We live in it. We will die in it. But tomorrow there will be light, for those now crying in the night. For those to whom day is denied. To whom death is a gift. To whom life is forbidden."

Is this for real?  
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The King Of Crumpets - Crumpet Boy!

- 1991 RM125

Is this for real?  
------------------------------------------------------------
The King Of Crumpets - Crumpet Boy!

- 1991 RM125

sounds like you answered your own question. get busy.lol  
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"Every time I start thinking the world is all bad, then I start seeing some people out there having fun on motorcycles. It makes me take another look." -Steve McQueen

ok i had a half a bottle of hp2 10w30 and a half bottle of 20w50 so i mixed them which are the same thing only thicker
how do i drain old gas?
plug is at a hard angle to take off
the guy sayed it was at 44:1 ratio
it is not siezed it kicks over and doesnt skid in neutral when pushed
i am pretty sure it wasnt warmed up or it fouled plug but i dont know why it would foul the plug when i accelerate  

i was just asking like are any of those the possible problem  

Dude all of those are problems. You have a list made, get to work lol  

but those might not be the problem i dont have any tools to take off the spark plug i have some gear oil but thats not it i dont know how to drain the old gas if someone can tell me that would be great  

Turn your fuel off, take the hose off your petcock, have something to drain the fuel into and turn the fuel back on and it should come out. NOTE: you may want to leave the fuel hose on the petcock and take off the other end that way it's easier to drain.

And if you can't take the spark plug off, how do you know it's fouled out???

 

here.

to remove the spark plug grab a small crescent wrench and loosen it up. if it's like mine it's easiest on the right side. it's gonna be a tight fit but you'll get it. if it's black get a new one.

the carb is easiest if you first drain the bowl. take out the drain plug on the bottom. on my minuki i can get the main jet out through this opening.

Casey was right on the gas tank.


kill switch i kind of doubt but it's a possibility

top end is the last thing i would do. it's probably something stupid and you might as well try the cheap stuff.

drain that tranny oil and get one viscosity of oil. don't mix them and don't use below 10W40.

make sure you let the bike warm up properly. i let mine run with the choke on until it quits running then i turn off the choke and just give it a little gas. then when it revs smoothly and right as soon as i hit the throttle i know it's ready to go.


worst comes to worst you might need a top end.  
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03 rm125

2stroke eff tee dubba u