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1982 kz440a
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Discussion Starter · #1 ·
TrialsRider educated me on the fact that it's not a good idea to run a hose from the crankcase vent to the ground because it's going to suck a bunch of crud into the engine so while I was waiting for a kit to come in I built a catch bottle using parts from home depot:
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I used a 1"x1/2"x1" pvc tee with a threaded cap on the bottom and a 1/2" plug to drain the oil. It works fine but I had some concerns about the temperature of the exhaust gasses that would pass thru it (pvc is only rated for 140 degrees) the other thing is pvc pipe is such a thick walled tube it has very little holding capacity to size ratio. Lastly, the total cost of buying all these fittings and the breather filter separately almost exceeded the cost of a professionally made unit. So it was a fun project, but I'm much happier with the aluminum can I got in the mail today. I mounted it to the frame with two hose clamps:
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I will eventually weld a bracket so it bolts on. The whole setup with the filter was about 26$ on Amazon and it actually looks and feels like a very well-made unit.
 

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lol I still think your home build would have worked pretty good.
The gasses are steam hot but not flame hot, or we certainly hope so because flame hot would mean you have a hole in a piston.
 

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Be careful with that fitting that you used to hose clamp it to the frame. Mine broke very easily.

I ended up with large hose clamps around the canister to secure it to the frame.
 

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1982 kz440a
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Discussion Starter · #4 ·
Be careful with that fitting that you used to hose clamp it to the frame. Mine broke very easily.

I ended up with large hose clamps around the canister to secure it to the frame.
Thank You for the heads up. I really wanted to weld a tab in place to screw it down, perhaps I should add a platform to support the weight from the bottom. BTW, does yours have two ports like mine? I used the one labelled "out" because it goes down through the canister before venting out the breather. Is ithis correct?
 

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Mine is similar. The in and out are side by side on mine. I run a hose from the "out" port into my belly pan because I am using it for road racing.
 

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I've always just run my breather hose into a soda can zip tied to the frame/battery box
 

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Depending on the racing org, some require a second hose from the catch bottle into the belly pan.

The heavy catch bottle here has a one way valve to keep from sucking back into the crank case.

My current race bikes just have a one way valve in the hose between the crank case and the plastic bottle.
 

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My current race bikes just have a one way valve in the hose between the crank case and the plastic bottle.
got a link to one you recommend?
 

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most everything i ride leaks oil
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I've always just run my breather hose into a soda can zip tied to the frame/battery box

i do more or less the same thing



this is a triumph 650, which used an open breather hose from stock that just ran to the end of the rear mudguard. the one here is a 0.75-inch tube 72 inches long, with an inner volume of 31 cubic inches. along with the catch bottle at around 29 cubic inches this gives 60 inches of shielded breather to match the 40 inches of tidal volume that the 360-degree engine produces. so there's little opportunity for road grit to be sucked all the way through to the crankcase. by the time any crankcase gases get to the end they're so cold that the oil mist turns to goo. there's also two smaller lines from the rocker boxes.

simple is better, to my way of thinking.
 
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