250-500cc WR 360 Powervalve leaking oil - what sealing?

Hello guys

I have a bit of a problem with my WR 360 - I had to remove the cover of powervalve to change a seal which was leaking and now its leaking all over the cover...

the cover according to manual has no gasket just 4 bolts and its metal to metal...some gasket silicone will solve the problem?

make sure the sealing surfaces are perfect and the cover is not warped. dont use silicone around anything that gets contaminated with fuel. the beads on the inside that squish out will gel up and fall off and go all over. make a gasket is suspect an imperfection. bolts are 3 finger tight...do not over do it.

Are you referring to the top or side cover?

on the attached picture I changed part # 23 which was leaking. now its leaking all over parts 24 - cover and body.

I cleaned the surfaces and inside of the powervalve very well with WD 40 and looked perfect when I put the cover on ...

As I recall the seal is to keep dirt out
Look at the gasket below the power valve where it seals the valves
What ratio are you running
Is there oil coming out of your pipe?

I put around 200 ml of oil at every 10 liters of gas - 40:1 ratio
oil is coming out of the pipe
gaskets look fine...

From the parts diagram, seems like you need a new PV shaft seal.

The last time l had oil weeping from the PV was due to an air leak and bad jetting - too rich and all that oil in the exhaust goes everywhere.