Sachs G3 1D - Bing 12mm Air Box

Hi all! First post, new here, just got my G3 yesterday.

I'm missing the back half of the air box on my Bing 12mm carb. Front half is there and functional, choke works fine. I'm trying to figure out how get an air filter on there so that it is functional and doesn't look awful. Can't seem to find many examples of people who have done that. Can anyone point me in the right direction? Thanks!

Re: Sachs G3 1D - Bing 12mm Air Box

post a wtb ad on buy/sell

Re: Sachs G3 1D - Bing 12mm Air Box

awakeby java /

Thanks! I don't really want to buy anything yet, I'm looking for options on getting a filter onto my Bing 12mm carb. The front half of the air box works fine, but other than sticking a stock filter into that and figuring out a way to make it stay put, I don't know what else to do. Most of the bikes I've seen are running alternate carbs.

Re: Sachs G3 1D - Bing 12mm Air Box

DrGeorgeTompson (Alan) /

It's the square bing right? Can't you just zip tie some foam over the end of the box?

Re: Sachs G3 1D - Bing 12mm Air Box

awakeby java /

That's a great idea for the time being. I'd like to find something more solid in the future though. I've been thinking about making up a cad file for an adapter that takes the front of the airbox into a tube that will accept a standard clamp on filter. I can probably get that milled at our local makerspace.

Re: Sachs G3 1D - Bing 12mm Air Box

Dr. Mantis Toboggan M.D. /

Treat's & Moped Junkyard both have reproductions of the original air box, filter and clip. Looks like Treat's is currently out of the air box though.

https://www.treatland.tv/category-s/98.htm?searching=Y&sort=5&cat=98&show=50&page=1&f-sachs=69

http://www.mopedjunkyard.com/sachs-air-box_c_525.html

Re: Sachs G3 1D - Bing 12mm Air Box

awakeby java /

Yes, Can't help but feel like $35-40 is a bit salty for a plastic box though. If I end up running this carb I'll consider it. Thanks for your help!

Re: Sachs G3 1D - Bing 12mm Air Box

> awake by java Wrote:

> -------------------------------------------------------

> Yes, Can't help but feel like $35-40 is a bit salty for a plastic box

> though. If I end up running this carb I'll consider it. Thanks for your

> help!

So , take the difference from what you think is a fair price and compare that difference to what it would take to end up with an adapter to accept a clamp on ...

Your time , finding material and buying it . Then the cost of milling .

Maybe you live in China or possibly India .

Re: Sachs G3 1D - Bing 12mm Air Box

Charles McCusker /

> awake by java Wrote:

> -------------------------------------------------------

> Yes, Can't help but feel like $35-40 is a bit salty for a plastic box

> though. If I end up running this carb I'll consider it. Thanks for your

> help!

injection molded parts are expensive when you don't sell thousands of units. why you don't see much injection molded parts for these old mopeds (or old cars) you'll never get your money back out of the cost of making the mold. Either that or the part is being cast in urethane from a soft tool, again per piece price is high.

That said, personally I'd CAD up that adapter in probably 5 minutes, and have it 3D printed on HP's new printer out of nylon. part cost would be low enough that you'd be in it for less than that air box and including a mesh filter.

Re: Sachs G3 1D - Bing 12mm Air Box

> Charles McCusker Wrote:

> -------------------------------------------------------

> > awake by java Wrote:

>

> > -------------------------------------------------------

>

> > Yes, Can't help but feel like $35-40 is a bit salty for a plastic box

>

> > though. If I end up running this carb I'll consider it. Thanks for

> your

>

> > help!

>

> injection molded parts are expensive when you don't sell thousands of

> units. why you don't see much injection molded parts for these old

> mopeds (or old cars) you'll never get your money back out of the cost of

> making the mold. Either that or the part is being cast in urethane from

> a soft tool, again per piece price is high.

>

> That said, personally I'd CAD up that adapter in probably 5 minutes, and

> have it 3D printed on HP's new printer out of nylon. part cost would be

> low enough that you'd be in it for less than that air box and including

> a mesh filter.

That's great , if you happen to have access to a multi-jet fusion printer .

Can't imagine every garage has one . ;)

Re: Sachs G3 1D - Bing 12mm Air Box

Charles McCusker /

> P D Wrote:

> -------------------------------------------------------

> > Charles McCusker Wrote:

>

> > -------------------------------------------------------

>

> > > awake by java Wrote:

>

> >

>

> > > -------------------------------------------------------

>

> >

>

> > > Yes, Can't help but feel like $35-40 is a bit salty for a plastic

> box

>

> >

>

> > > though. If I end up running this carb I'll consider it. Thanks for

>

> > your

>

> >

>

> > > help!

>

> >

>

> > injection molded parts are expensive when you don't sell thousands of

>

> > units. why you don't see much injection molded parts for these old

>

> > mopeds (or old cars) you'll never get your money back out of the cost

> of

>

> > making the mold. Either that or the part is being cast in urethane

> from

>

> > a soft tool, again per piece price is high.

>

> >

>

> > That said, personally I'd CAD up that adapter in probably 5 minutes,

> and

>

> > have it 3D printed on HP's new printer out of nylon. part cost would

> be

>

> > low enough that you'd be in it for less than that air box and

> including

>

> > a mesh filter.

>

> That's great , if you happen to have access to a multi-jet fusion

> printer .

>

> Can't imagine every garage has one . ;)

I mean I do have access to one, but that's not the point lol anyone can contact me and I can get you a quote, but alternatively, https://i.materialise.com/en and https://www.shapeways.com/ have them and are competitive on price. so if OP wants to print their 3D file, this isn't a bad option.

Re: Sachs G3 1D - Bing 12mm Air Box

Charles McCusker /

all that said, i really wish i had a printer at home. i hate having to wait on work to print me parts, and while discounted, still having to pay for them.

Re: Sachs G3 1D - Bing 12mm Air Box

awakeby java /

My CR-10 can theoretically print nylon, but that would be way more work than having shipways do it.

I'm just exploring options at this point.

Re: Sachs G3 1D - Bing 12mm Air Box

Charles McCusker /

nice thing about the HP fusion jet printer is it does not build using layers, so you have a SOLID nylon part like you would with injection molding, so there is no directional weakness like you would have with layers.

Re: Sachs G3 1D - Bing 12mm Air Box

Nylon panty hose secured with rubber bands zip ties or Velcro straps works OK.

Also hear rumor that the square ice tea plastic bottle is a good fit on the end if you want to mod something up.

The idea of 3D printing a back half that then effectively holds a quality aftermarket metal mesh filter would be the best option. I’m surprised there is not one made already out on treats as the stock air box is so restricting.

Re: Sachs G3 1D - Bing 12mm Air Box

^what he said

pure leaf tea cost ya like a buck at most convenience stores and comes with tea... cut the neck part off, fits over the box pretty close, clamp it on (hose clamps, zip tie, glue whatever) and make some holes by the other end. You can get filter elements for lawnmowers at any autoparts and hardware stores and fit something in. don't want much, needs to be minimallt restrictive. could just silicone in a section of folder paper air filter from like a car even, but probably not worth it.

I don't use a filter on there anyway, but that'll do it.

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