Sp1000 crankcase pressure

Technical Big Block Tonti and Loop Frame models
1

Hi all
What crankcase pressure is acceptable coming from dipstick tube,mine is quite excessive engine breathers clear ect.:thinking:

2

Theres a valve in the beather, “The Top Hat”, which creates something of a vacuum. It stops pumping air. Of course if you unplug the dipstick you undo this effect and thecrancase will suck and blow.

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3

Good answer. Plus, that ‘top hat’ can gum up. Easily removed, as I recall, and ? Just a circlip holding a ball bearing in place?

4

Yup just a ball bearing. As the breather pipe sits over it , its not always obvious its there.

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5

Hi not sure if I have that🤔 will have to rummage.

6

Easily done. I lost mine many years ago when I threw it away with a perisheshed breather elbow. You live and learn.

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