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Old 11-29-2012, 05:17 PM   #46
bgoodsoil
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Thanks, Thomas. I guess I'll stick with the high pipe. Now if I can find an aluminum version maybe I could drop a few pounds.
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Old 11-29-2012, 07:04 PM   #47
disston
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The two small holes are breather holes. If you look inside the float bowl area up into the main body of the carb right below where these holes are yo see two more holes inside the main carb body. One of these can be plugged inside the float bowl area and the other vented to your hose. You should be OK with just one.
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Old 11-29-2012, 07:52 PM   #48
Box'a'bits
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Here's some photos of variants in the 40mm carb. These come from here. Ironically it was Igormortis who made me aware of this site when I was having jetting issues & was considering using an air fuel meter.


Bing - 123, no idea where the breather vent is, sorry. Might still be the bottom of the float bowl?
Bing - 123a, vent is just below the plastic bing cover


Bing - 123a2. Breather port is the big cap above the riveted bing plate, & near the inlet. Looks like it would be relatively easy to take the cap off, & put a breather tube on that, or to create a spigot to take the breather much higher on the bike.
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Old 11-29-2012, 11:18 PM   #49
Thomas B.
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Hay Prutser,
another question. When you drown your bike on the Sibirsky trip your air filter probably got soaked. Were you using the standart paper one? Did you change and dry it? Or just ran the wet one?
Never had my bike that deep in the water yet so I'm curiose.
thanks for the answer.
cheers Thomas

P.S. My carbs are 32s from a R80G/S so I have the breathertube in the float bowl.
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Old 11-30-2012, 03:11 AM   #50
Prutser
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Quote:
Originally Posted by Thomas B. View Post
Hay Prutser,
another question. When you drown your bike on the Sibirsky trip your air filter probably got soaked. Were you using the standart paper one? Did you change and dry it? Or just ran the wet one?
Never had my bike that deep in the water yet so I'm curiose.
thanks for the answer.
cheers Thomas

P.S. My carbs are 32s from a R80G/S so I have the breathertube in the float bowl.
After succesfully drowning my old gs i learned NOT to use the paper filter. Since soon after the drowning mushrooms start to grow in there. And sand wil wear through the paper.

I was using a uni filter (foam) ! The problem with those is that they don't seal very well. Dirt is being sucked through between the airbox and the filter. To solve this I used a original filter, took out the paper and mounted the uni on top of the original filter. Made some longer clips to lock them together.

Now my air intake was against the bottom of my fuel tank.

A big problem that I would like to take care of is the water getting in when you make a big bow wave.
That was washing the dirt through the filter.
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Old 11-30-2012, 03:10 PM   #51
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Just noticed this in the Baja GS replica thread:

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Old 11-30-2012, 04:11 PM   #52
Phreaky Phil
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Here's my filter setup. Made for me by these guys http://www.uniflow.com.au/

Yes I know, its a bit dirty

With the top lifted off. Still nice and clean underneath.

The underside. They use your old paper filter, cut the guts out of it and fit their own. As the fillter is flat, spares can be carried without taking up much space. I used to find with the paper filters there would always be a fine layer of dust on the inside of the airbox. Not so with the foam type.
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Old 12-02-2012, 02:55 PM   #53
Prutser
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Quote:
Originally Posted by Phreaky Phil View Post
Here's my filter setup. Made for me by these guys http://www.uniflow.com.au/
They use your old paper filter, cut the guts out of it and fit their own. As the fillter is flat, spares can be carried without taking up much space. I used to find with the paper filters there would always be a fine layer of dust on the inside of the airbox. Not so with the foam type.
That's a much better set-up than the ones for sale over here. Really like the pre-filter and easy to wash top.
The ones they sell over here have a soft rubber outside that slides of the edge of the air box.

I'm thinking about trying this.


And put some waterproof pre-filters over them when doing river crossings to deal with the splashing of a bow wave.
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Old 12-02-2012, 04:25 PM   #54
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Some good ideas here.

Does anyone know if the standard airbox is the tuned, resonant type? Some reports seem to suggest that it is, due to loss of midrange torque when you start hacking holes in it.

I would be keen to modify the airbox to better deal with water, so long as the original characteristics can be maintained, or improved!
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Old 12-02-2012, 04:25 PM   #55
hardwaregrrl
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Quote:
Originally Posted by Prutser View Post
After succesfully drowning my old gs i learned NOT to use the paper filter. Since soon after the drowning mushrooms start to grow in there. And sand wil wear through the paper.

I was using a uni filter (foam) ! The problem with those is that they don't seal very well. Dirt is being sucked through between the airbox and the filter. To solve this I used a original filter, took out the paper and mounted the uni on top of the original filter. Made some longer clips to lock them together.

Now my air intake was against the bottom of my fuel tank.

A big problem that I would like to take care of is the water getting in when you make a big bow wave.
That was washing the dirt through the filter.

I've got the same problem with the UNI. Always wondered if there was a way to turn the horns, maybe with some vinyl hose and some how make it bend 90 degrees out to the sides, maybe put a bologna slice on the end so it will keep the water out. Rooney made it look very complicated....

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Old 12-02-2012, 04:30 PM   #56
igormortis
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Always wondered if there was a way to turn the horns...
I keep meaning to check if there's space for the cover to be mounted backwards.
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Old 12-02-2012, 07:44 PM   #57
bgoodsoil
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I want to see the pics when somebody sinks their G/S so deep that they need their air filter that high.
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Old 12-02-2012, 07:57 PM   #58
igormortis
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Quote:
Originally Posted by bgoodsoil View Post
I want to see the pics when somebody sinks their G/S so deep that they need their air filter that high.
In case you missed it...

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Old 12-02-2012, 08:12 PM   #59
hardwaregrrl
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Brad, you've got to check it out. I just realized I've suprassed your post count..... I seriously need a job!!!

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Old 12-02-2012, 08:17 PM   #60
igormortis
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I seriously need a job!!!
Come and help me paint my house so I can work on my bike so I can go to Siberia!
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