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Posted by: pauldog---------------------
hey everyone i have a 1993 kdx 250 i keep fouling plugs the manual says to run a b9es plug would it hurt to run a b8es i dont want to do any damage to the new piston or could this be a carburation problem thanks for any info.
Paul
Posted by: rethnal---------------------
an 8 should be just fine for that bike. My friend runs a 7 in his WR250 without a problem. I run a 8 in my 200 and I'm not very nice to it sometimes.
Posted by: Deputy25---------------------
I'm running a B8ES in my 91 KDX 250, no problems at all.
Posted by: Rhodester---------------------
I'd also be looking for rich jetting to be a major factor in your plug fouling.
Posted by: JasonWho---------------------
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Posted by: Dogz---------------------
my 250 fouls plugs only with stock jetting 165 main 42 pilot, A 158/38,clip second from top sets me up for 25-30 celcius and high humidity.
B9 plugs, the B8s were better before i got the jeting set up.
No idea where you'd start if your at altitude in Co.
FMF pipe no airbox lid and kx250 head gasket, stock gearing Sunoco Gold 94 fuel@50:1 Amsoil Dominator (formerly2000).
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