yz 125 wont start.....

[xjs3667]

I just picked up a 2000 yamaha yz125  yesterday,  yes it is 2 stroke,   well it started on first kick for me when I got it, I stopped at my brothers on my way home to show him my new bike..... it started on first kick there too,  well I finally got home, unloaded it from truck and it fired on second kick, sputtered a little, and died, fired up again on first kick after that, then bogged down and died.... never could get it to start again, I've been trying for the past couple hours it pops a little, got it back fire once but still nothing.

things I've done, put fresh fuel in it... I realize now I mixed the wrong gas ... I used 87 octane instead of the recomended 92..... so that could be a problem?

I pulled the plug and it's soaked in fuel and pretty black and oily... cleaned it up still same thing....

I do know its getting spark cuz it will pop every once in a while.   I don't know much about 2 strokes other than if everything is in check it should fire on first or second kick... idk...   

Any help would be greatly appreciated   thanks guys

[burl]

Sounds like needle is sticking, clean the carb out and run seafoam in it afterwords, fresh plug and your good to go!

[michigan maniac]

Put a brand new plug in it, my yz250 don't like used plugs at all

[xjs3667]

Ill do both and will let ya all know, Im also guna drain the tank and put higher octane in...

[marshall]

hold it wide open, she'll start on the second kick! check the air filter, might have too much oil on it

[xjs3667]

hold it wide open, she'll start on the second kick! check the air filter, might have too much oil on it

Ive done that to, little harder to kick it lol but still a no go, the filter is a little dirty/ oily but it fire even with the filter off.

[old school truck dude]

Push start it, usually works when a 2stroke is bein stubborn, also take carb apart n spray it out get the little holes real good

[xjs3667]

yea I tried pushin it   I cant get goin fast enough... still kinda recovering from my broken leg, I'm guna try all the other stuff tomorrow if its still being a byTch then I might tell my brother to push me around lol

[4x4xdodgeman]

do a comperrsion test   the gas octane has nothing to do with it.

[xjs3667]

compression is fine...... got a new plug... freakin $9 for one plug, wtf?     and half ass cleaned the carb. lol   well it fired on first kick, was prollly the plug     thanks for all the help guys, this thing rips! my first 2 stroke, I love it 

[michigan maniac]

Yup once those yz foul a plug, throw it away and buy a new one, sucks they are pricey, I run either maxima or klotz in my bike and haven't fouled a plug in 2years good oil and gas help it stay beter longer

[fast78ford]

leave the petcock on when transporting it? crankcase could be full of fuel

[xjs3667]

leave the petcock on when transporting it? crankcase could be full of fuel

nope never... I never do on any of my toys , not since the first time I made that mistake a long time ago

[fast78ford]

leave the petcock on when transporting it? crankcase could be full of fuel

nope never... I never do on any of my toys , not since the first time I made that mistake a long time ago

haha it was worth a shot lol

[s10crazy]

not sure if you figured this out yet but heres a little thing i know about 2 strokes

you started it.....probably revved a few times and shut it down

same thing at your buddys house

2 strokes hate that......if youre going to start it you need to ride it....dont just rev it without a load and shut it down......guaranteed to foul the plug.

toss the plug and throw in a new one

just my opinion coming from years of experience

[xjs3667]

compression is fine...... got a new plug... freakin $9 for one plug, wtf?     and half ass cleaned the carb. lol   well it fired on first kick, was prollly the plug     thanks for all the help guys, this thing rips! my first 2 stroke, I love it 

not sure if you figured this out yet but heres a little thing i know about 2 strokes

you started it.....probably revved a few times and shut it down

same thing at your buddys house

2 strokes hate that......if youre going to start it you need to ride it....dont just rev it without a load and shut it down......guaranteed to foul the plug.

toss the plug and throw in a new one

just my opinion coming from years of experience