I have a 1964 Royal Enfield 250 which ran with Castrol R for a couple of seasons in classic racing. I want to change back to a mineral oil, as I plan to use it as a road bike and Castrol R is not really suited to that kind of use; normally being drained and refilled at each race meeting.
Castrol simply advise flushing the engine a couple of times with a mineral oil, should remove any residues but I am concerned as I have read numerous recommendations that the engine needs to be stripped and thoroughly cleaned to remove all traces of sludge and varnish before this comes into contact with mineral oil.
I guess that, since the castor will not dissolve in the mineral oil, it will circulate as a gloop and hopefully exit via the filter or drain plug, provided the oil ways are clear. But I am concerned as to how it will behave in the plain and roller bearings.Does anybody have experience of changing from castor based to mineral oils, either flushing or stripping ? Any recommendations as to a good flushing oil for caster oil ?
Castrol simply advise flushing the engine a couple of times with a mineral oil, should remove any residues but I am concerned as I have read numerous recommendations that the engine needs to be stripped and thoroughly cleaned to remove all traces of sludge and varnish before this comes into contact with mineral oil.
I guess that, since the castor will not dissolve in the mineral oil, it will circulate as a gloop and hopefully exit via the filter or drain plug, provided the oil ways are clear. But I am concerned as to how it will behave in the plain and roller bearings.Does anybody have experience of changing from castor based to mineral oils, either flushing or stripping ? Any recommendations as to a good flushing oil for caster oil ?