Ok i have tried my hardest to sort this out but i cannot solve. My 04 EC200 has been running rich and won't idle. Hers the setup as I know it:
Main jet 175
Pilot Jet 40 (was 52)
Needle clip position 2 (Don't know type of needle, can't read whats stamped on it)
Float set at 16mm corresponding with seam of float to be level with edge of float bowl. However, the float has very little to move before it hits top of carb (about 2mm) , so wondering if it's set too high even though consensus seems to be the 16mm/alignment with edge of bowl is correct. The float valve looks ok but i can't really tell.
As far as the airscrew goes, it is currently at 3 turns out which helps it nearly idle with the idle screw nearly all the way screwed in. I notice when i blip the throttle it takes a long time to return to idle (and then for the engine to stop) but there is nothing impeding the throttle cable and the return of the slide when you snap the throttle with the engine off is pretty good I believe.
Once warm, bike responds to choke i.e. if you pull choke on when idling (holding it idling as it won't idle by itself) it loads up an dies.
Running 32:1 for the new piston/rings but was previously running 40:1 and having same issues
I've repacked the muffler, decarboned the pipe (standard gas gas pipe), put in new plug and cleaned the carb thoroughly. Air filter is new and clean, lightly oiled. Also has brand new piston and rings so compression is good. I've attached a shot of the plug today after a plug chop, looks pretty grim . Insulator is nearly white yet threads of plug are all oiled up! Bike is a bit boggy at the low end (0 to 1/4 throttle) but seems to run clean after that. Smokes a lot and pipe is oily at the end already even though i have just cleaned and repacked it.
And finally, bike suddenly started making a clattering noise at various revs (mainly lower). I presume thats the powervalve clatter spoken about but while i was doing the piston and rings i checked it out and seemed fine to me just a little slack. If I put my finger through the exhaust header i can "rattle" the power valve considerably with my finger. Not sure if thats normal or not.
Anyway, the bigger issue is the richness and inability to make it idle, and now potentially running lean at higher revs according to plug chop picture.
Any ideas anyone???
