Waking up an old post with my take on the Final Drive breather mod.
After getting leaking seals front and side from a blocked breather hole due to many kms of red desert dust and years of crusty gravel roads, I decided to install a remote breather up under the seat.
Using 4mm hard tough PE pressure line and push in fittings it was surprisingly easy.
Parts list: 1 x1/8" BSP right angle and a 1 x 1/8" BSP 4mm straight push in fittings, 2m of line to suit the fittings, and maybe a thread tap to suit as well, but you could probably just force the fittings in the right size hole as it is kinda thin gauge metal and cable ties.
Getting the old breather out was a pain, the top cap screwed off in no time, so that left a conical stub that is difficult to grip, but I managed to get it out without distorting it. Upon inspection, it was confirmed that the tiny little pin hole in the stub post body was blocked and that was why both seals let go together.
So I carefully bored a hole over the same area of the original pin hole consuming it with the new bigger hole to accommodate the new 90 degree hose fitting, threaded it, and gently screwed it into place.
I used the cap that was twisted off as the upper cup with oiled foam in it retained by a wire pin and the straight hose fitting installed into the bottom of it.
Routed the pipe as you can see in pics, with a small hole drilled into one of the fins on the FD to use a cable tie.
Under the seat is about as high as the air box intake, so if water gets that high, I will have other things to worry about I reckon!
Now I can forget about any dust blockages and water ingress, one less to worry about in the middle of nowhere and a long way from home.
Oh, and I used clear pipe only because I couldn't get black at the time, but I will replace it with black when I find some so it will hardly be noticeable, so easy with push in fittings!