KDX200 tickover problem!

[muckyduck]

I have a 1998 KDX200. On tickover the revs increase/decrease
on their own, also when coming to a halt when riding the revs stay high for a time. I've checked fuel, filter, air leak (sprayed with WD40 no effect)cleaned carb with no joy. She fires up ok and on full throttle goes fine....Its got the KDX 'rattle' which is a little quieter when pulling the clutch in, could it be mains seals leaking, losing vacuum causing bad carburation? Any ideas,thanks for reading... Muckyduck

 

[ebeck]

Compresion check is next. If you have bad seals it will suck in the oil from the crank case. Are you loosing oil?

 

[Bandit400]

Sound like it's running a little lean at idle, Try turning in the air screw

 

[John Harris]

Maybe its a carb boot leak, letting in varing amounts of stray air as the rubber flexes?

 

[Trigger1911]

Sounds like it is running lean