milky goop

Status
Not open for further replies.
Joined
Oct 10, 2017
Messages
1,121
Country flag
well I cranked commando up today to stir the oil and when I took filler cap off saw milky goop on inside of filler neck obviously coming from crankcase breather pipe..i have mikes XS reed valve breather have noticed little beads of condensation on breather tubing too this have never happened before what is the matter now? weather? humidity? temperature?
 
well I cranked commando up today to stir the oil and when I took filler cap off saw milky goop on inside of filler neck obviously coming from crankcase breather pipe..i have mikes XS reed valve breather have noticed little beads of condensation on breather tubing too this have never happened before what is the matter now? weather? humidity? temperature?
I have a similar breather set up using a catch bottle I was surprised to find a dml amount of water, no oil in the bottle. I assume it's a little condensation whilst the motor is warming up.
 
milky crap is the result of water vapor condensing oil. Best to bring oil up to full temperature to evaporate the H2O
 
Alan , it is water , best method to clear is a nice backroad ride maybe extending ride further than usual , keeping revs up a little will help , should clear after 45 minutes of ride enjoyment .....
 
I had that same problem when I had the Mike's XS reed valve fitted to my 850. I placed it hidden way up under the battery compartment. "Not Smart" I don't have this now as I fitted Jim Comstock's design which I machined and bolted directly to the L/H engine crankcase when I rebuilt the engine, so this problem went away and so did my oil leaking problems.
I would suggest you get the reed-valve as close to the engine, so as to have the heat from the engine help to boil off the condensation of water, as much as possible.
Tom
 
  • Like
Reactions: baz
reed valve is on two inch long piece of tubing from engine I need to go for a decent ride for sure...will do next weekend.. too many bikes need to sell some and focus on a few rather than seven but wife says keep all of them for old age
 
"reed valve is on two inch long piece of tubing from engine"
There lies the problem Alan. The tubing is acting as an insulator. It would be best to directly fix the reed valve to the engine. Three members who worked this out were Comnoz/cNw, ludwig and JS motorsport, Look at their designs.
Cheers
Tom
 
cNw website, JS motorsport website and for ludwigs: I'll try and find the old post. or maybe someone else can. https://www.accessnorton.com/NortonCommando/my-cool-750-commando.17781/#post-263446
Edit: unfortunately I think the pictures are fotof#kit. and will not display but ludwig placed his reed-valve in the timing case. PM ludwig.

there you go.
Cheers,
Tom
 
Last edited:
Status
Not open for further replies.
Back
Top