new sump breather combination

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jseng1

jseng1

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Here's an interesting idea. I found this photo on the net. I'm familiar with this brand of breather but I've never seen it located beneath the sump before. Its attached to the sump plug and has a snorkel tube. Creative thinking for a do it yourselfer.

new sump breather combination
 
Looks too vulnerable to damage for my liking. Best on the back of the crankcase.
 
Matchless said:
Looks too vulnerable to damage for my liking. Best on the back of the crankcase.
Click to expand...
Yep, especially if you must cross thru school / hospital / other parking lots with tall speed bumps. Cross at a minimum angle!
 
I like it too but doesn't it stick down too much? The NYC Norton breather and the Combat cases one supplied now by Maddass in the Philippines are my choices so far.
 
Not an argument just a silly observation.

My exhaust runs under the sump plug, is lower than this reed valve solution, and has never hit anything riding my Norton on the street including speed bumps. If I hit something large enough to dent my exhaust on the road, I think I'd have other problems like being dead, or at least unconscious. :)
 
Cool find jseng1, thanks for sharing it.
One of the great things about this site is the sharing of creative and interesting ideas/solutions.;)
 
The breather is mine, the depth does look a lot but the frame and centre stand will hit the ground first. So if it ever makes contact with the ground you have bigger issues. What the picture does not show is the engine tilted forward 15 degrees in the frame, so the lowest bit is actually pulled up by the 15 degree tilt.

new sump breather combination


new sump breather combination
 
This is my version..

www.accessnorton.com

Installed CNW Comstock reed valve breather off timing chest

I installed a CNW/Comstock reed valve breather on my P11 timing chest in place of my hack job PCV breather. I'm hoping the CNW reed valve breather works better somewhere in the power delivery. First and foremost the CNW reed valve breather is not designed to be installed off the timing chest...
www.accessnorton.com www.accessnorton.com
 
kommando
What did you use for a screen? How far does it hang down from the case?
 
jseng1 said:
What did you use for a screen?
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The original brass folded screen is there inside the sump plug, the upward projecting screen is some stainless braid tube cover (tube removed) with epoxy covering the cut end to keep it in shape, its flexible as its going into a set of 850 cases with the ledge in the way. I will have to measure the projection tomorrow. I have never posted details as it is a rip off of previous designs and a one off anyway. The aluminium intermediate plate has 6 holes for locating on the sump plug so there are 6 possible positions so you can ensure the tube points backwards.
 
kommando said:
The original brass folded screen is there inside the sump plug, the upward projecting screen is some stainless braid tube cover (tube removed) with epoxy covering the cut end to keep it in shape, its flexible as its going into a set of 850 cases with the ledge in the way. I will have to measure the projection tomorrow. I have never posted details as it is a rip off of previous designs and a one off anyway. The aluminium intermediate plate has 6 holes for locating on the sump plug so there are 6 possible positions so you can ensure the tube points backwards.
Click to expand...

As I mentioned on the other thread, I had already purchased one of Comnoz breathers from Jim but found that the third ISO on my bike would not allow it’s figment, so with Jim’s permission I made my own and sold on the other one on.
 
jseng1 said:
How far does it hang down from the case?
Click to expand...
Below the sump plug its lower by 30mm front 45mm rear if as fitted to Featherbed, but tilt the engine 15 degrees and both front and back are 15mm below the lower front engine mount stud.
 
I always thought that a drop-in, one-way valve insert for the '72 rear case breather would be the ultimate solution for '72 models.

Simply remove the plastic mesh stuffing and drop in a small insert...
 
I did my version of the reed valve breather, also using the Mike's XS valve shown. I drilled and tapped a hole in the rear of the crankcase, the idea being to place the valve between the crankcase and the gearbox. This is not really a good idea, since the amount of space available is rather limited (= bugger all). The current bodge (aka workaround) uses a hose barb threaded into the crankcase and a length of hose up to the valve which is about level with the top of the engine plates. This does tend to kink though due to the limited space, so is not ideal.
The next version will use an alloy block to create a 90 degree elbow, thus avoiding the kinky hose problem. This does place more oil between the crankcase and the valve, but I don't think its a problem.
On reflection though, much time and agony could have been saved by using one of the several off-the-shelf versions.

Oh well, on the next project....
 
kommando said:
Below the sump plug its lower by 30mm front 45mm rear if as fitted to Featherbed, but tilt the engine 15 degrees and both front and back are 15mm below the lower front engine mount stud.
Click to expand...
So - in comparison - how far down does the JC design hang down if it were on a vertically mounted Atlas motor?
 
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