Creamy goo in rocker cover=?

[mogatron]

Hi team, I've been getting this creamy coloured goo in the rocker cover area, Whats that all about? Does that mean i'm getting water or exhaust gas in my oil or something? Do i need to go see a doctor about the problem?

[PSL184]

If its running OK chances are that its just caused by condensation whilst we are having all this cold weather. esp, if only doing short runs.....

[bmcecosse]

It's caused by inadequate crankcase breathing - exacerbated by low temperature running - and short run use. Best to remove the cover and clean it all out (check valve gaps while in there!) - check breather pipe is clear - and connection to carb (or filter casing) - and consider fitting a higher temperature thermostat (88 for winter). Also worth blocking off part of the grille - and taking it out for a good hard run now and again!

[mogatron]

the mogatron's been running fine but i have been keeping the heating on full. could this be affecting it? i'm doing runs of about 30 mins to and from work. i cleaned it all out already. Is there away to improve on crankcase breathing?

[bmcecosse]

The later HS2 carb with the breather connection on the side is FAR better than the pipe-into-air filter on the earlier engines. Otherwise - 88 stat and blank off the grille! And having the heating ON is fine.