Maybe of use to others, here's what I run on my own engine.
In my view the reed valve pulses which allows oil thrown from the crank/rods to get past it and into the breather chamber and therefore escapes into the airbox far too easy, by sealing the reed valve and making the engine breath via the side covers there is less chance of oil getting carried into the chamber.
I sealed off the reed valve in the crankcase by flattening the limiter plate and enlarged the hole into the breather chamber from the generator side of the engine and drilled a new hole into the clutch side of the engine.
There is also a small 3mm dia hole added to allow the chamber to drain of oil into the clutch side.
I did consider filling the chamber with a pan scrubber too but didn't have enough trust in anything suitable :laugh
I also run an SV1000 front cam cover with the reed valve removed from the pair valve. The radiator mount is handed differently so you need to move the rad mount.
In my view the reed valve pulses which allows oil thrown from the crank/rods to get past it and into the breather chamber and therefore escapes into the airbox far too easy, by sealing the reed valve and making the engine breath via the side covers there is less chance of oil getting carried into the chamber.
I sealed off the reed valve in the crankcase by flattening the limiter plate and enlarged the hole into the breather chamber from the generator side of the engine and drilled a new hole into the clutch side of the engine.
There is also a small 3mm dia hole added to allow the chamber to drain of oil into the clutch side.
I did consider filling the chamber with a pan scrubber too but didn't have enough trust in anything suitable :laugh
I also run an SV1000 front cam cover with the reed valve removed from the pair valve. The radiator mount is handed differently so you need to move the rad mount.