CB1100 Idle speed instability problem

[Speed_imp]

Another idea that comes to my mind Max is that the spool is made by two pieces:

- External or outer body (silver)
- Internal hub with the thread (golden)



If you force it you can make both parts slip in reference to the other with not much effort, so if it closes the valve and the spool goes to end of travel making phisical contact with the housing and the axle keeps on turning (if it has enough force to do it) it will probably loose the real position of the spool. It can produce a wrong positioning of the valve and probably a wrong fuel mixture. Actually when it starts failing every time you open throttle the idle speed goes lower and lower. Then if you set ignition off and on again it gets again the real position of the valve and idle speed goes to normal again. Pawel can check that with his own hands to check the force needed to make it slip. Just screw to the end the spool and once at the end try to keep on turning.

Actually I have been making slip the inner and outer parts with my hands with minimal effort when screwing clockwise the spool over the axle. I mean when you have screwed it till the end and supposedly you can not turn it further in that direction.