Hi, signed up about a week ago and own a 1990 NSR 250 R7L ,I have owned this a couple months now and purchased it after a full rebuild? however on riding I found gear change was stiff and difficult to find neutral I put it down to incorrect clutch adjustment and stiffness after rebuild ,after further rides and adjustments no better so I took the gearbox out only to find that the oil/water pump drive gear has started to break up with the sheared teeth in the bottom edge of the gearbox and in oil filter, lucky I found it otherwise possible engine seize if it stripped completely, I am not sure if this could possibly be the cause of poor gear change but I am in the process of checking the gearbox and fitting new friction/steel plates, This brings me back to the oil/water pump drive Gear, I have been onto David silver and they say the drive is discontinued and gave me a part number 19215 KF3 770 I cannot seem to source one anywhere .
