DERBI primary transmission spacer for DERBI Euro 3 & 4

Here is the DERBI Euro 3 and 4 primary transmission spare spacer. The gearbox sometimes jams. The symptom is that the motorcycle stalls at a stop sign, for example, while you are in the clutch. In this case the washer is involved, it tends to heat up if the gearbox oil changes are not done properly. If the problem persists do not advise you to change the complete transmission.