Author Archives: Declan Lee

Gear box oil disappearing- etz 250

Looking for some advice from the forum. I’ve been bothered by an increasing level of excess smoke from my etz 250 ( 1984 19k miles) but with no other running issues and no obvious cause.However upon checking the gear oil level yesterday I find most of it gone.It appears that I’ve been burning up the gear oil along with the 2t.Could this be anything other than Crankcase oil seal failure? My mechanical experience to date is confined to Top end and forks etc- is it a big Job? Can it be done with the motor in situ, do I need to split the engine? What about tools required?I’ve rooted around the web and got some conflicting info.Any help is really appreciated.Greta Thunberg would not approve the current situation!Thanks