Motorcycle crankcase breather tanks.

[Agemax]

these have been discussed on the site before, some like them some don't, some think they are a good idea, some think they are a waste of time.

either way, you look for them on ebay or wherever and all you seem to find is car orientated tanks which are far to big for motorcycles.

so, i decided to design a motorcycle specific tank.small, but with a 200Ml capacity they are plenty enough for most engines,(unless you have serious engine problems.
they come in 2 variations, upright or horizontal,



they have built in level sight glasses or the upright one can have an external level sight tube. there is a built in vent at the top and a drain at the bottom.
any amount of inlet fittings can be added (within reason)
mounting is easy, big jubilee clips, zip ties or make a decent bracket and pop rivet it on(see white one).
they are metal so can be painted,powder coated or chromed, which would look fab



drain valves are schrader valves with the guts ripped out so you can add extensions,angled adapters or flexi adapters to allow for easy draining.

what does everyone think?

[John Kat]

Looks great to me!
What would the dimensions be?
I suppose you need to add a breather kind of filter?

[Agemax]

Looks great to me!
What would the dimensions be?
I suppose you need to add a breather kind of filter?

they are 54mm diameter and approximately 120mm in length, they have a built in breather filter on the top but it can be replaced by a tube if you wish to fit a small k&n style filter on the top instead

[Whitedog]

Interesting and good looking project. Good luck with the marketing.

My '80 Honda XL had one from the factory. Not near as nice as what you have put together.

[gearhead13]

You might laugh, but I have a Coke bottle with a part of a rag and a big hole cut in it for breather filter. Been running it for 6 months or so and to my surprise the filter isnt even wet, some day I will buy a proper filter for it

[Agemax]

You might laugh, but I have a Coke bottle with a part of a rag and a big hole cut in it for breather filter. Been running it for 6 months or so and to my surprise the filter isnt even wet, some day I will buy a proper filter for it

the filter should not get wet, if it does you are in BIG trouble. the filter is there to allow fumes and and pressure build up to escape.
the bottle is there to collect any moisture/fluid then gets blown out the engine

[chuck hahn]

Adrian...I am not familiar with "ML" size..is this basically the size of a soup can I am guessing?

[Agemax]

Adrian...I am not familiar with "ML" size..is this basically the size of a soup can I am guessing?

200 ml = 6.76280454 US fluid ounces

[chuck hahn]

The reason I ask is this.

If you look at part 24 this is the breather hose for the TX I have. There are no fittings on the airbox for recycle like our GSs do.

So as a consiquence, it basically open vents right above the front flat area of the swing arm and oil splatters back onto the pipes. There seems to be some kind of plastic nipple broke off in the end but i can find any pics showing a vapor catch tank. This may be my fix for stopping the mess!!

http://www.bikebandit.com/houseofmotorcycles/1973-yamaha-tx750/o/m7788#sch219116

[Agemax]

The reason I ask is this.

If you look at part 24 this is the breather hose for the TX I have. There are no fittings on the airbox for recycle like our GSs do.

So as a consiquence, it basically open vents right above the front flat area of the swing arm and oil splatters back onto the pipes. There seems to be some kind of plastic nipple broke off in the end but i can find any pics showing a vapor catch tank. This may be my fix for stopping the mess!!


http://www.bikebandit.com/houseofmot...7788#sch219116

this is the exact reason these tanks are designed for Chuck, catch any fluid but vent any fumes or pressure build up.

All GS's have them as stock, it called the air box!

[chuck hahn]

As such that I stated...but what about the Yamaha TX? Why would there seem to be a broken plastic nipple in the end of the tube, but yet there isnt any catch tank in any of the fiches? This is what is perplexing me.

I will need a catch tank of some sort and your pictures have sparked some ideas.

[chuck hahn]

I also should add that there are no obvious mounts or brackets that would suggest there was an OEM mounting for any catch tank.

[Agemax]

I also should add that there are no obvious mounts or brackets that would suggest there was an OEM mounting for any catch tank.

are you sure it shouldn't go to a fitting maybe in the swingarm or frame maybe?
my only other guess is that the pipe is from a different bike, with the broken part still in the tube???????

[chuck hahn]

Adrain...look at the fiche I posted...its the OEM tube...but where does it go at the open end is the mystery. And as i stated earlier, there is NOT a nipple on the airbox for recycle of the vapor/ oil droplets.

[Agemax]

Adrain...look at the fiche I posted...its the OEM tube...but where does it go at the open end is the mystery. And as i stated eralier, there is NOT a nipple on the airbox for recycle of the vapor/ oil droplets.

yes i have looked. i only asked because i dont know if it is the OEM tube you have fitted or just any old pipe off another bike.
i know you said there is no nipple on the airbox........what about the oil tank?

i dont know because i know nothing about this bike!!!!!!