Need help to figure out whats wrong, done almost anything I can imagine and problem is still going on...
3rd cylinder is so rich that spark plug brokes approx. every 1500km. Also 4th cylinder is leaner than 1st and 2nd cylinders. Picture from plugs attached. Bike is running and pulling smoothly until spark plug gets broken. Doesnt loss coolant or engine oil, I have owned bike for little over 3000km.
Done so far:
Synchronised throttle bodies,
Cleaned fuel rail and lines,
Changed injectors,
Checked for vacuum leakages
Mixed ignition coils between cylinders.
Next step would be to measure compression pressures. Any thoughts or other hints?