KDXRIDER.NET

hey guys sometimes when i pull over at the side of a trail and pull the clutch in, my 2003 kdx 200 sounds funny. my friend says it is a lean surge cause it goes wah wah wah wah. i have a 48 pilot, 2nd clip needle and 160 main jet. also when i rev it in neutral the engine still spins pretty high for a second or two. the bike has an fmf gnarly pipe and sielencer and removed airbox. does anyone know any solutions to this or is this a normal thing to happen?

Whats the plug look like?

factoryX wrote:Whats the plug look like?

I'll second that and also add to check you're float height and needle and seat condition. That's pretty fat stock jetting. With a new top end I'm running a 48 like you and a 158. I'm still rich but don't foul plugs. My bike did the exact same thing but my needle seat combo was letting in too much fuel and screwing the float height up.

i measured the float hight when th ecar was of and it was at 17mm, so its in tolerance. i havent fould a plug yet but ill try and check my inlet needle tomorrow.

turner wrote:i measured the float hight when th ecar was of and it was at 17mm, so its in tolerance. i havent fould a plug yet but ill try and check my inlet needle tomorrow.

your friend could be right, you should do a plug chop or two and see what's going on in there...

Lean condition doesn't quite fit in with the jet sizes you've listed. I would suspect an air leak.

yeah i repacked my sielencer and after riding saturday, sploog has dripped down again. i am going to order some 155 and 45 jets tonight. I ride at 1700' so hopefully theyll be better.

Ditto what juliend said. You can check with spray of water, WD, etc spray all around intake/exh etc and see if idle changes(stabilizes).