250 crankcase breather

[Parsnips]

Can anyone assist me with identifying what is the correct fitting to mate with the holes on the top of the timing gear case in the photo?






[embed image. 08Sep21 -Doug, Admin]

[Doug]

PDF file of sketch








-Doug

[Parsnips]

Many thanks Doug, it shouldn't be too difficult to make up something similar. You have also answered something else that has been puzzling me - how the primary covered is fixed is also shown in your photo.
Thanks again, Mark

[Tazmantic]

Nice to see another 250 owner, I made one for mine out of some steel square section and some copper pipe.

[Cliffy73]

Hi I have a spare 250 breather if you still require one.

[Parsnips]

Thanks but I managed to make one that does the job, I would be interested if you have any other 250 parts.

[Cliffy73]

I also have a 250 which I'm trying to source enough parts to build a spare engine. Finding a good crank is hard work.



Image converted to linked file - Dave,26Nov2021

[EW-Ron]

So remind us, why would you need a 'spare' engine.
That one looks superb enough as is ?

I always think that when you find every example is completely knackered,
they obviously had good use out of it  !

[Cliffy73]

It's always nice to have a spare unit as it will be covering a fair few miles. They are not the best unit and are very prone to sieving up due to the thickness of the cylinders . I've looked at making it a larger capacity but it not that easy.