Regarding last post thanks Ian there was a worn depression on one corner of the mag platform very easy to miss. After fitting the new seal in the mag drive gear and retiming etc very pleased to see a first kick start. After a 5 minute ride a slight seep of oil seen in same area. On the second start oil is now coming out fast. With no power coming from the dynamo I checked the mag clutch lots of oil in there also. I checked the breather at the bottom of the crankcase it is solid in there nothing moves Are these repairable! I think this could be the problem. Bryon