Harley VL transmission vent?

[Buster]

I rode my 1931 VL 70 miles and then opened trans filler snout to check oil. When I removed filler top. a fair amount of oil flowed up out of the filler snout. I believe I had the trans overfilled and the heated oil expanded. Is there a vent in this transmission that should have relieved this pressure? I am wondering if I have a clogged vent. Thanks.

[Buster]

I have solved why the oil ran over when I removed cap. When I overfilled trans, the bike was on sidestand. When I removed cap and it overflowed, the bike was on centerstand. Still curious as how the trans is vented, if it is.

[Peter Cooke]

It vents through the plunger Buster.

[Steve Slocombe]

Be careful when assembling a box from loose parts, as the earlier 2251-15 plungers do not have the vent hole in them. Also check the vent holes in the top cover are not blocked by rust or paint.

[Buster]

Thanks Peter and Steve.

[Steve Swan]

It vents through the plunger Buster.

Peter, if possible, i would very much appreciate if you could provide a picture of that detent spring and even better if you could tell me the length, o.d., number of coils and the diameter of the wire. Thanks in advance for any information you can provide.

[Peter Cooke]

Pics attached Steve,
I counted ~14 1/2 coils plus the ends.

[Steve Swan]

Pics attached Steve,
I counted ~14 1/2 coils plus the ends.

Thank you, Peter!!! This is a big help and further confirms what i have been learning about these springs thus far!!!!