Hello all can anyone tell me the difference between weber magneti marelli iw724 injectors? The green one and the red ones. I know they are different colours ! Are they interchangeable. I have heard of different flow rates but cannot find anymore info. Harley Davison website USA ,and Zane laverda website also, informative as I believe they both used these injectors in the late 90's. I suspect the green injectors on my 748 are getting old and dribley. A bit like me really. The spark plugs keep fouling up. This could be another issue though. Please see pics, thanks.