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| sdezego:
Looking really nice. Yes, as John mentioned, a lot of early motors had a Breather gear that was timed. Harley Davidson used the pretty much the same engine case setup and timed breather setup from 1936 all the way up to the 90's (if you can believe it). ...and almost all earlier models were pretty much the same too. To give you an idea, the breather was a hollow cylinder about 3" long and 1" in dia and had a solid gear on the gear case side (driven by the cam) (Open end of breather cyl faced into crank case). It had a window on the side that lined up with a window in the gear case side when in time. The Breather slid into the case connecting to a pocket in the back of the crank case. When venting, the windows would align venting crank case pressure into the breather (inside the hollow cylinder) and out into the gear case. And then from a fitting/tube into the Primary chain side to mist oil the chain. I am sure I made it sound more complicated than it is, but you could certainly dumb it down for your needs. I am sure I could come up with some pictures if you need. Regards, Shawn |
| sdezego:
Most of my Harley pictures are pre digital camera :palm:, but I quickly dug some up on the web to illustrate. Notice the breather annulus? And the casting behind it on the left that serves the pocket in the crank case. and the breather gear Timed with cam |
| sdezego:
After some thought, I realized that you are probably looking for something more period correct (which I am not sure if this is or not). This type of design "I know" was in some of the 20's era, but I have no experience on motorcycle engine dating prior to that. Very interested in seeing what was used though... |
| tumutbound:
I think this shows what RusselT was talking about |
| DavidA:
Now that makes a lot more sense. Dave. |
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