ORIGINAL: rlmcnii
I think we have to dispel the misconception that oil from the breather being recycled into the inlet causes loss of power.
It does not.YS engines do it.Oil ratio goes up and you adjust for it..If breather oil is dirty and contains dangerous impurities, then the oil is substandard or the engine has tremendous wear.
If it is the case then YS , OS, ASP, Magnum and full sized engine manufacturers should be sued for poor engineering.In fact the good thing is that residual fuel left over is recombusted and blown out thru the exhaust
By what method does one re-combust that which has been combusted?
You must remember that not all fuel is burnt the first time round,minute amounts escape being burnt due to leakages, incomplete combustion etc, this portion including combustion byproducts which are not neutralized are the culprits in causing corrosion,oil alone does not cause corrosion.
The presence of swarf in the crankcase signals a breakdown of the engine if it is present in 4strokers, it also means YS engines would be destroyed in no time and we should avoid buying these engines! In actual fact,swarf inevitably ends up causing massive damage to the piston and liner as it thrown up by the vortices present in the crankcase without it being drawn into the combustion chamber.
I think we're getting off topic here anyway!! A quick recap,I think we're all trying to help Highside and I hope he resolves his engine anomaly soon,I'm curious if the solution is the same as mine. Cheers and compliments of the season!!