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Post by DOUG (gopher) on Mar 12, 2007 23:08:59 GMT -5
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Post by StewRoss on Mar 13, 2007 1:48:04 GMT -5
Hi, The spigot on the cases is about 19mm...personally I am more inclined toward a filter that pushes into a hose and then I extend the hose higher up under the seat... I have seen plenty of others put them straight onto the spigot though...your choice. Can't remember what I paid for the last one I bought... SR  |
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Post by wotavidone on Mar 13, 2007 17:08:50 GMT -5
Here's a suggestion.
I went to autopro and bought a Redline brand oil breather filter. Its got a chrome end cap and red filter fabric, so I reckon it looks cool. It cost $13.95.
It only has a 15mm rubber tube for mounting it.
I obtain about 1.5 inches of 19mm I.D. heater hose and two hose clamps from the same store. Then I went to the Thrifty link Hardware shop and bought a copper reducing nipple intended for joining 15mm pipe to 12mm pipe. This nipple has outside diameter of 19mm at one end and 15 mm at the other. Equipped with these bits, I was able to mate my 15mm I.D. filter to the 19mm O.D. spigot using the short length of 19mm ID heater hose. Looks neat enough to me.
My experience has been that you should follow Stew's advice. Mounted right down on the case looks cool, but you do end up slowly accumulating a thin film of oil over the outside of your casings. I reckon the long hose would see more of the fine oil mist settling inside and making its way back into the crank case.
Mick
PS, I am toying with putting a short length of 52mm steel tube in-line between the carb and my pod type air cleaner. I would put a 19mm tee on this and run a 19mm hose from the crank case breather. This would be going back to the original concept of breathing the engine into the filtered air side of the air box.
The only thing is I'm a bit leery of actually creating suction on the crankcase. I thought about running the pipe inside the 52mm pipe and facing the end in to the airflow, this would create dynamic air pressure due to the airflow on the end of the pipe, which should cancel the static pressure drop caused by the engine sucking air in.
Has anyone tried this? Facing a pitot tube into the airflow and measuring the dynamic head is the way flow measurements are done in my industry. And on airplanes too, I think, so I reckon I could use this to ensure I don't vacuum the crankcase too much.
Mick.
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Post by frankyb on Mar 13, 2007 19:16:15 GMT -5
Heres my dollars worth, follow Stews suggestion and mount it up high. You can always use one of those braided line sleeve kits that you see in the auto shops to dress it up. I run a piece of clear plastic tube on my dirt tracker that goes way up under the seat and has a lawn mower air filter on the end of it. I think that if you have a system that is free flowing then you wnt have a problem with vacuuming. Cheers Franky b.
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Post by hopwheels on Mar 13, 2007 19:28:47 GMT -5
I can't find the thread where Stew mentions mounting up high... why is that necessary again? Not doubting, just want to know. Thanks!
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Post by wotavidone on Mar 13, 2007 20:04:21 GMT -5
Stew's suggestion is in this thread. I assume he is suggesting it for the same reason I am.
When the filter is mounted right on the case, you get a bit of oil mist blown out of the filter and you wind up with a film of oil on your motor. I'm getting it with my XT, which is why I am looking at alternatives.
Nothing serious, but it doesn't look nice, and dust sticks to it.
So its good to run it high.
If looks are important, and they are to me, do like Frankyb says, you can put the filter right up out of sight and dress the line up with the braided sleeve kit to make it look pretty.
If I did a real show quality bike, I'd leave it right down low for looks, cause I wouldn't be riding it that much.
Mick
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Post by hopwheels on Mar 13, 2007 21:14:30 GMT -5
Thanks... mine has been blowing a small amount of what I thought was smoke out of that filter, but maybe it's this...
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Post by DOUG (gopher) on Mar 14, 2007 1:05:57 GMT -5
Wow thanks guys, I didn't really realise how many options I could play around with!! I guess that's why SRs are so cool.
I think I'll take a visit to my local hardware store and repco and see what I can come up with....
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