Rpm drops on idle

[Jakobi]

You can use your ear to set the slide height too. By opening and closing the throttle you can hear when the slide bottoms out. If you back the idle screw out until you hear it bottom metal on metal you know its closed fully. Then slowly turn it in until you hear the pitch change as it contacts the plastic idle screw.

Always make sure the throttle is open (slide up) a bit when adjusting the idle screw. Takes all the load off it and makes it much easier to adjust and reduces any chance of damaging the tip.

[kyton]

How does 1 set the 1mm gap. With idle screw or the nut on top of carb to pull slide up.

[Jakobi]

Use the idle screw to set the slide height, and the adjusters (at throttle housing and carb top) to set the free play in the throttle.

[kyton]

I have idle screw all the way in now. Put a 38 pilot in. Idles now when warm. Feels like it bogs a tad from 1/4 to 1/2 throttle and then lets rip. N1ec needle 2nd clip. 175 main. Sealevel

[Jim Cook]

Originally Posted by kyton

I have idle screw all the way in now. Put a 38 pilot in. Idles now when warm. Feels like it bogs a tad from 1/4 to 1/2 throttle and then lets rip. N1ec needle 2nd clip. 175 main. Sealevel

Those are typical symptoms for your jetting (needle especially). You have raised the needle with the throttle stop screw to get it to idle.
The N1EC and N1ED needles that came on the bikes helped Les Tinius sell a lot of his jetting kits.
The factory riders seldom let the engine rpm drop back to idle. I was told that the N1Ex series needles were Kawasaki MX needles.


The difference in what a different (proper) jet needle will make will amaze you.

[kyton]

I have the only adjusted with idle screw. The nut on the top of the carb is all the way down now. Needle that was in there was a nbwh. Don't know I I put a 172 main in if it will make a difference or move the clip from 2nd to 3rd
Mine is a 04 200ec

[swehollow]

Guys im just stumped. Put the n1eg needle in, 38 pilot and 175 Main. Still cant have a decent idle. It just fucking drops randomly and kills the engine.

It can idle fine sometime 2, sometimes 15 secpnds, but eventually something happens and the bike rpm just goes way down to something That sounds more right to begin With, a calmer better sounds, but eventually dies. Im at my wits ends With this piece of shit.yeah i Said it. Nothing but trouble With this bike since day 1.

[Jakobi]

Am I allowed to laugh? That would be insensitive.

Can be frustrating as. More things. When you rebuilt it, what was your squish clearance? and.. who cares if it won't idle for more than 15-30 seconds. Ride it with the throttle open.

[swehollow]

Laugh all you want but there is something wrong. Its more often then not 2 seconds. Never 30.

I dont know what squish is.

[kyton]

Mine idles now with new settings. Seems to be a little rich still. find the bike very easy to kick & you can push the kick lever from top to stop position by hand going to do a compression test and in the process of getting another piston and rings. Must also replace the idle screw as the screwhead is worn badly, amongst the other items to replace.