Yz-125 fouling plugs!!

[flashg]

After thinking about what bob said, I read the OP again. It would appear I didn't read it correctly. He said "fouling plugs" and for some reason (I don't know why) I thought he said "fouling plugs and smoking really badly" Thats why I was thinking extra oil creaping into crankcase area.
My apologies to all for running off in the wrong direction.

[sidecar bob]

You're so right bob, leave the cheapest option till last haha
Because this is KB.

You mean leave what's actually wrong with it until last.
Drop one number on the plug if it's an NGK, so, if it's got a 9 in it, go to the same number, but with an 8 in it & the problem will disappear.
Also, ignore the subsequent posters that don't know how spark plugs work that are going to tell you that you will melt your piston by doing that.

[scott411]

i would check he was mixing the fuel correctly first,

40 : 1 does not mean 250ml to 10 litres to some people,

[husaberg]

You mean leave what's actually wrong with it until last.
Drop one number on the plug if it's an NGK, so, if it's got a 9 in it, go to the same number, but with an 8 in it & the problem will disappear.
Also, ignore the subsequent posters that don't know how spark plugs work that are going to tell you that you will melt your piston by doing that.

The way i read it he has replaced plugs so unless he has used an incorrect grade or is a total bunny going to a hotter plug will only mask the underlying issue.

[sidecar bob]

The way i read it he has replaced plugs so unless he has used an incorrect grade or is a total bunny going to a hotter plug will only mask the underlying issue.

That it's being putted about on with the wrong grade of plug in it?
Why do people always go for the most difficult fix?
Even your latest link on ESE thread says that putting around on premix causes fouled plugs.
http://www.dansmc.com/2_stroke_oilpump.htm

[husaberg]

That it's being putted about on with the wrong grade of plug in it?
Why do people always go for the most difficult fix?
Even your latest link on ESE thread says that putting around on premix causes fouled plugs.
http://www.dansmc.com/2_stroke_oilpump.htm

I personally wouldn't go any hotter than a 8 even if it was a 1955 villiers.

but yes 8 will be fine if he is a bunny.
the link was posted for the pics of a pump for Neil, rather than its content
PS there is a nice pic on the ese thread of what a NGK6 did to a piston.
But its almost imposible to diagnose issues via the internet because you never get all the inormation